Category: Monthly Reviews

                                                    Changeable and Wet

Temperatures

The average maximum temperature during May 2024 in Shoreham was 18.4 Celsius (65F), and that was close to the long-term average.  The  average minimum temperature was 10.7 Celsius (51F), and that was close to 1.5 Celsius (<3F) above the May normal.  Average night-time temperatures in May were the highest in the area for 16 years.  

The highest temperature recorded during the month was 25.1 Celsius (77F) on the 11th, but 24.3 Celsius (76F) occurred on the 12th, and a further 6 days had maxima above 20 Celsius (68F). All of these warmer days were sandwiched between the 7th and 20th.  On many days (15) maxima ranged from 15 to 18 Celsius (59-64F), but 2 cooler days occurred. On the 2nd, the high for the day was 14.9 Celsius (59F), but the following day was cooler with a top temperature of just 14.4 Celsius (58F).    

An above normal number of cloudy nights was responsible for keeping minimum temperatures well above average, although no individual records were broken. On the 12th, a minimum of 13.8 Celsius (57F) occurred, and 3 other nights, the 14th, 26th and 29th, had minimum temperatures above 13 Celsius (55F).  A further 14 nights recorded lows between 11 and 13 Celsius (52-55F), with the majority of these milder nights occurring after mid-month. No particularly cool nights occurred during May, but the temperature fell below 10 Celsius (50F) on 10 nights. Only 3 of these cooler nights occurred after mid month, with the coolest of them, the 24th, having a low of 6.6 Celsius (44F). A minimum of 6.7 Celsius (44F) occurred on the 4th, with 7 out of the first 10 days of the month having minima below 10 Celsius (50F). The only other temperature below 7 Celsius (45F) occurred on the 5th, when 5.4 Celsius (42F) was recorded.   

The sea temperature rose steadily from 12 Celsius (54F) at the beginning of the month, to 15 Celsius (59F) during the last week of May.

Frost

There were no frosts in May. The lowest grass temperature was 1.7 Celsius (35F) on the 5th. 

Rain

Rainfall in May amounted to 68.8 millimetres (2.7 ins.),  which was around 80% above  the monthly average.   It was the wettest May in the area for 10 years. Measurable rain fell on 15 days, which was 4 days above the average, and  wet days (when 1 millimetre (0.04 ins.), or more, of rain falls) numbered 11, which was also 4 days above the average.  The opening week of the month had some heavy rain. On the 1st, there were 4.2 millimetres (0.17 ins.), and on the 5th and 6th there were 10.2 and 13.2 millimetres (0.40  and 0.52 ins.) respectively. This was followed by 6 dry days, but 7.0 millimetres occurred (0.27 ins.) occurred on the 13th, and although there were several dry days, further rain fell, with 8.2 millimetres (0.32 ins.)  on the 16th, and 5.0 millimetres (0.2 ins.) on the 22nd. The 23rd and 24th were the last completely dry days of the month. On both the 25th and 27th, there were 5.0 millimetres (0.2 ins.) of rain, with 5.2 millimetres (0.2 ins.) on the 28th, and 3.4 millimetres (0.13 ins.) on the 30th. 

Hail

No hail was observed in this part of Shoreham during the month.  

Thunder

A series of intense thunderstorms affected the area in the early hours of the 2nd. The storms lasted for almost 2 hours, and although rainfall was only briefly heavy, lightning and thunder were almost continuous.

Snow

No sleet or snow was observed in Shoreham.

Wind

Winds were predominantly from between southwest and northwest,  with winds from  these quadrants accounting for over 60% of the daily observations. East or southeasterly winds blew on several days. Usually, these were precursors to rain-bearing Atlantic frontal systems. Overall, it was not a windy month, with the strongest breezes generally  occurring during the first and last weeks of May.  At  Shoreham Airport,  there was an isolated gust to 31 knots (35 mph) during the severe thunderstorm that occurred in the early hours of the 2nd, otherwise, the only gusts above 30 knots (34 mph) were on the afternoon and evening of the 28th. The southwesterly wind was at its strongest early in  the afternoon  when 32 knots (36 mph) were measured. 

Fog

Early fog occurred on the 1st,  with misty low cloud shrouding local hilltops on several occasions during the month.

Statistics for May 2024

• Rainfall totals unreliable for all English stations

                                                Very Mild and Wet

Temperatures

The average maximum temperature during March 2024 in Shoreham was 12.3 Celsius (54F), and that was around  1 Celsius (<2F) above the long-term average.  The  average minimum temperature was 6.6 Celsius (44F), and that was close to 1.5 Celsius (<3F) above the March normal. Only 1957 and 1959 appear to have had milder nights during March according to local records dating back to 1880.  

The highest temperature recorded during the month was 16.4 Celsius (62F) on both the 20th and 31st. A further 4 days had maxima above 14 Celsius (57F) with the earliest very mild day occurring on the the 14th, and the other 3 very mild days occurring after the 23rd. On most other days highs ranged from 10 to 14 Celsius (50-57F), but there were 4 exceptions. The first 2 days of the month had maxima of 9.9 Celsius. A high of 9.1 Celsius (48F) occurred on the 5th, with the 11th only 0.1 Celsius (<0.2F) less cool.   

Many mild nights occurred during March, and on 3 occasions the temperature stayed above 10 Celsius (50F).  The minimum  on the 13th was 10.1 Celsius (50F), with 10.6 Celsius (51F) on the 15th, and 10.3 Celsius (50F) on the 19th. A further 9 nights had lows between 8 and 10 Celsius (46-50F). Although 10 nights had minimum temperatures below 5 Celsius (41F), only 4 nights had lows under 4 Celsius (39F). All of these colder nights occurred during the first week of March, but just 2 nights had minima below 3 Celsius (37F). The lowest temperature was 0.4 Celsius (33F) with 1.9 Celsius (36F) occurring on the 4th.   

The sea temperature slowly rose from 9 Celsius (48F) at the beginning of the month,  to 10 Celsius (50F) by the end of March.

Frost

There was no air frost during March, which was 2 below average.  Grass frost occurred on 5 nights, and that was 5 below average. Apart from on the 24th, when the grass temperature briefly dipped to minus 0.6 Celsius (31F), the grass frosts were confined to the first week of the month. Very slight grass frost occurred on the 1st and 7th, but on the 3rd and 4th, grass minima were minus 3.3 and minus 3.9 Celsius (27-26F) respectively. 

Rain

Rainfall in March amounted to 105.0 millimetres (4.1 ins.),  which was over 70% above  the monthly average. Although March 2023 was wetter, only 9  Marches have been wetter according to local records commencing in 1880.  Measurable rain fell on 22 days, which was 6 days above the average, and  wet days (when 1 millimetre (0.04 ins.), or more, of rain falls) numbered 19, which was 7 days above the average. Showers gave 7.2 millimetres (0.3 ins) of rain on the 1st, and in  a very unsettled  month, there was only 1 completely dry day between the 1st and 19th, namely the 7th. Daily rainfall exceeded 5  millimetres (0.2 ins.) on 7 occasions during this period, and included totals of 10.0 millimetres (0.4 ins.) on both the 5th and 11th.  There were more in the way of dry days after the 19th, and only 3 days had totals in excess of 2 millimetres (0.08 ins.). The 26th had 14.4 millimetres (0.57 ins.) of rain, with  the 27th and 28th having 7.0 millimetres (0.28 ins.) and 6.2 millimetres (0.24 ins.) respectively. 

Hail

Small hail fell in 5 showers on the 1st. The earliest shower was mid-morning, with the last one occurring mid-evening. Small hail also occurred in showers during the afternoon of the 23rd.  

Thunder

No thunder was heard in this part of Shoreham.

Snow

No sleet or snow was observed in this part of Shoreham.

Wind

Winds were predominantly from the southwest and accounted for about 40% of the daily observations. The cyclonic nature of the month (mean pressure was almost 9 millibars below average) produced winds from a wide variety of directions. The month was not especially windy, although some strong gusts occurred during the first, and again towards the end of March. At  Shoreham Airport,  southwesterly winds gusted to 41 knots (47 mph) on the morning of the 1st, with southerly gusts peaking at 38 knots (43 mph) early in the morning on the 2nd. There were no further gusts above 30 knots (34 mph) until the afternoon of the 23rd when northwesterlies gusted to 32 knots (37 mph)  in showers. Southwesterly winds peaked at 31 knots (34 mph) early in the afternoon on the 27th. The 28th was windy all day, and southwesterly gusts in the evening reached 44 knots (50 mph). The strong winds continued into the early hours of the 29th, with 36 knots (41 mph) recorded just after midnight. The last 2 days of the month were much less windy. 

Fog

Fog, dense at first, lasted until late morning on the 6th, and sea fog occurred at times from late morning until evening on the 18th.

Statistics for March 2024

• Rainfall totals unreliable for all stations

                                                         Wet, Cool and Windy

Temperatures

The average maximum temperature during July 2023 in Shoreham was 21.2 Celsius (70F), and that was more than 2 Celsius (4F) below normal for the time of year.  The average minimum temperature was 14.4 Celsius (58F), which was less than 0.5 Celsius (<1F) below average for July.  Overall, it was the coolest July for 11 years. 

The highest temperature recorded during the month was 28.9 Celsius (84F) on the 7th, but the next warmest day was the 8th, with a high of 24.7 Celsius (76F), followed by the 1st and 10th,  with these days both having highs of 23.3 Celsius (74F). Only 2 more days had maxima above 22 Celsius (72F),  with the vast majority of days having highs ranging from 19 to 22 Celsius (66-72F). There were  3 exceptions, these all occurring during the last week of the month.  On the 27th, a maximum of 18.3 Celsius (65F) occurred, with 18.5 Celsius (65F) and 18.4 Celsius (65F), on the 30th and 31st respectively. 

There were no especially warm nights during July, although the temperature on the 8th only fell to  19.8 Celsius (68F), and for much of that night the temperature stayed between 22 and 24 Celsius (72-75F).  The next warmest night was on the 28th with a low of 17.4 Celsius (63F),  but there were a further 13 nights with minimum temperatures above 15 Celsius (59F).  The remainder of the nights had minima between 11 and 15 Celsius (52-59F) but 4 exceptions occurred. The 5th, 7th and 18th each had minima between 10 and 11 Celsius (50-52F), but the 26th had a low of 9.4 Celsius (49F), making it the coolest night of the month.  

The sea temperature was 18 or 19 Celsius (64-66F) throughout the month.

Frost

There were no air or grass frosts during July. The lowest grass temperature was 6.1 Celsius (43F) on the 26th. 

Rain

Rainfall in July amounted to 88.4 millimetres (3.5 ins.),  which was around double  the monthly average.  It was the wettest July in  the area since 2012. Measurable rain fell on 14 days, which was 5 days above the average, and  wet days (when 1 millimetre (0.04 ins.), or more, of rain falls) numbered 8, which was 1 day above the average. The first 2 days of the month were dry, but light showers on the 3rd gave 0.2 millimetres  (0.01 ins.), followed by heavier showers and some more prolonged rain on the 4th which yielded 8.4 millimetres (0.3 ins.).  Showery bursts of rain gave 4.6 millimetres (0.2 ins.) on the 8th, and heavier rain on the 14th produced 11.4 millimetres (0.45 ins.) No significant rain fell during the following week,  but heavy rain and drizzle occurred at times on the 22nd to give a total of 20.0 millimetres (0.79 ins.). Although some dry weather occurred, the remainder of the month was changeable and, at times, wet. On the 24th, rainfall amounted to 6.4 millimetres (0.25 ins.) , and another 28 millimetres  (1.1 ins.) were measured on the 26th. Further, mostly light, rain fell during the rest of the month. On the 30th  5.4 millimetres (0.2 ins.) were measured, with 3 millimetres (0.12 ins.) on the last day of July.  

Hail

No hail was observed in this part of Shoreham.  

Thunder

Thunder occurred from around mid morning until early afternoon on the 8th, although amounts of rain associated with the storm cells were mainly small.

Snow

There was no sleet or snow observed in this part of Shoreham.

Wind

Apart from 2 days during the first week, winds during July blew from between southwest and northwest,  and southwesterly winds outnumbered the northwesterlies by a ratio of 2 to 1.  Winds were unusually strong for the time of year, and even on fine days, fresh or strong sea breezes occurred on many afternoons. At Shoreham Airport, southwesterly winds gusted to 37 knots   (42 mph) in the afternoon on  the 3rd, with gusts to 31 knots (35 mph) from a similar direction on the afternoon of the 5th. Although, breezy on  most afternoons, the next gusts above 30 knots (34 mph) did not occur until the 12th, when 32 knots (36 mph) were recorded during the afternoon. A gust of 33 knots (38 mph) occurred on the evening of the 14th, with 43 knots (49 mph) on the following evening, again from the southwest. The strong winds continued into the 16th with 36 knots (41 mph) occurring in the early hours. Southwesterly winds gusted above 30 knots (34 mph) during the afternoon and evening on the 22nd, peaking at 36 knots (41 mph) at midnight.    It remained breezy, but gusts stayed below 30 knots (34 mph) until the 27th, when overnight gusts reached 32 knots (37 mph). The  29th was mostly sunny, but the southwesterly sea breeze spoiled the  day, with gusts in the afternoon reaching 31 knots (35 mph). The windy theme continued until the end of the month with gusts reaching 34 knots (39 mph) in the evening of the 30th,   and 35 knots (40 mph) in the early hours of the 31st.   

Fog

It was often  misty with low cloud covering hill tops in association with the drizzly spells.

Statistics for July 2023

• Rainfall totals unreliable for all stations

Mild and Very Wet, then Dry and Rather Cold

Temperatures

The average maximum temperature during January 2023 in Shoreham was 8.7 Celsius (48F), and that was almost 0.5 Celsius (1F) above normal for the time of year. The average minimum temperature was 3.8 Celsius (39F), and that was around 0.2 Celsius (<0.5F) above average for January.

The highest temperature recorded during the month was 12.1 Celsius (54F) on the 4th, but the temperature reached, or exceeded, 11.0 Celsius (52F) on 11 further occasions, including 11.7 Celsius (53F) on both the 10th and 14th. The maximum reached 11.6 Celsius (53F) on both the 1st and 5th, a value shared with the 31st. However, the maximum on the 31st was the only high above 10 Celsius (50F) between the 15th and the end of the month. Whereas, between the 1st and 14th, there were only 2 days with maxima below 10 Celsius (50F). The coolest of these was the 9th with a high of 9.4 Celsius (49F). The cold weather arrived quickly after mid-month. A high of 5.6 Celsius (42F) on the 16th was followed by a maximum of 1.4 Celsius (34F) on the 17th. The temperature then stayed below 7 Celsius (45F) until the 26th and included highs of 4.4 Celsius (40F) on the 23rd, and values between 5.0 and 5.3 Celsius (41F) on the 18th, 19th, 24th and 25th.

There were several mild nights during January, with all of them, bar 1,  occurring before the 14th. On 4 nights the temperature stayed above 10 Celsius (50F) . The minimum was 11.2 Celsius (52F) on the 4th, the mildest night of the month, but 10.6 Celsius (51F) was recorded on the 1st, and 10.3 Celsius (50F) occurred on both the 7th and 12th. A further 5 nights had minima above 7 Celsius (45F), but only 1 of these milder nights occurred after the 13th. That night was the 30th when 7.1 Celsius (45F) was recorded. Almost all the cold nights were during the second half of January. A minimum of 2.7 Celsius (37F) was measured on the 10th, but this was the only cold night before the 16th. From the 16th until the end of the month there were 12 nights with lows under 3 Celsius (37F). It was particularly cold at night from the 17th to the 23rd with minima of minus 3.5 Celsius (26F), minus 4.3 Celsius (24F) and minus 3.2 Celsius (27F) on the 17th, 18th and 23rd respectively. 

The sea temperature was around 9 Celsius (48F) until mid month, then 7 or 8 Celsius (45-46F).

Frost

There was air frost on 7 nights during January,   around 2 nights above average. All of the air frosts occurred between the 17th and 23rd and they were slight or moderate with night temperatures ranging from minus 0.7 Celsius (31F) on the 21st to minus 4.3 Celsius (24F) on the 18th. A total of 12 ground frosts occurred, and that’s 1 below the average. Each night between the 17th and 23rd  had  air frost and grass frost, with 6th, 10th, 26th,  28th and 31st also having grass frosts. The cold spell around the third week had the lowest grass minima, with minus 5 Celsius (23F) on each night. The lowest value was minus 7.2 Celsius (19F) measured on both the 17th and 18th. 

Rain

Rainfall in January amounted to 115.8 millimetres (4.6 ins.), which was double the monthly average. It was the wettest January for 6 years.  Measurable rain fell on 17 days, which was 1 day below the average, and wet days (when 1 millimetre (0.04 ins.), or more, of rain falls) numbered 14, which was 1 day above the average.  Steady rain fell during the afternoon and into the evening of the 1st producing a total of 5.8 millimetres (0.23 ins.). Rain then fell  at times on each of the following 14 days. Some of the rain was quite heavy,  with 8.2 millimetres (0.32 ins.) measured on the 3rd and 5.8 millimetres (0.23 ins.) on the 7th. However, the heaviest rain of the month occurred during the 6 day period commencing on the 10th. A total of 80.6 millimetres (3.2 ins.) were recorded with 5 of the 6 days having over 10 millimetres (0.4 ins.) of rain. The highest daily totals were 17.0 millimetres (0.67 ins.) on the 13th, and 28.6 millimetres (1.13 ins.) on the 15th. The second half of January was completely different. Pressure rose steadily from the 16th and measurable rain only fell once, although melted frost added 0.2 millimetres (0.01 ins.) to the total on the 20th. The only day with measurable rain  was the 25th when a wet evening gave 2.8 millimetres (0.11 ins.).  

Hail

Small hail fell on 3 days during January. On the 8th, showers were accompanied by hail mid-afternoon and again in the late evening. A heavy, squally shower late on the evening of the 12th contained hail, and hail was also observed in  a mid-afternoon shower on the 15th.  

Thunder

There was heard on 2 days during January. A short-lived thunderstorm occurred on the afternoon of the 11th, and on the 12th, there were 2 rumbles of thunder in the late evening.

Snow

There was no sleet or snow observed in this part of Shoreham.

Wind

In the first half of January, southwesterly winds dominated on every day  except the 2nd,  when northwesterlies blew. During the second half of the month, winds were more variable with a slight dominance of winds from the northwest. The first half of the month was often very windy, whereas in the second half of the month winds were much lighter. At Shoreham Airport, the 1st was breezy, but the first gusts above 30 knots (34 mph) occurred on the afternoon of the 3rd, these peaking at 36 knots (41 mph) in the early evening. The brisk southwesterlies continued through the 4th with 37 knots (42 mph) recorded just before dawn. After somewhat of a lull during the 5th, a gust of 31 knots (35 mph) was registered early  on the 6th. The 7th was windy all day, with the southwesterlies producing a peak gust of 44 knots (50 mph) in the early evening. Many gusts over 30 knots (34 mph) occurred on the 8th, with the highest of 36 knots (41 mph) occurring in the late evening, followed by a gust of 34 knots (39 mph) occurring just after midnight on the 9th. Gusts of 34 knots (39 mph) occurred again in the afternoon and evening of the 10th. A gust of 46 knots (53 mph) occurred early in the evening of the 11th, with 45 knots (51 mph) measured early on the 12th during this especially windy spell. The 13th was breezy until late afternoon  with several gusts of 33 knots (38 mph). The 14th was windy, particularly during the morning with gusts of 40 knots (46 mph) observed. Early on the 15th, southwesterly gusts of 33 knots (38 mph) occurred, but winds veered westerly in the afternoon and became much lighter. As pressure built rapidly on the morning of the 16th, northwesterly increased to strong for a while with gusts peaking at 31 knots (35 mph), but during the rest of the month there were no further gusts above 30 knots, (34 mph) and not that many over 15 knots (17 mph).       

Fog

There was mist and morning fog on the 5th, and it was also very misty at times on the 25th.

Statistics for January 2023

* Totals unreliable

Exceptionally Mild

Temperatures

The average maximum temperature during October 2022 in Shoreham was 18.8 Celsius (66F), and that was around 3 Celsius (>5F) above normal for the time of year. The average minimum temperature was 12.0 Celsius (54F), and that was more than 2 Celsius (4F) above average for October. Overall, it was the mildest October in the area for at least 142 years. The only October that approached this October in warmth was that of 1948, when the temperature, using statistics from Beach House Park Worthing, was around 0.3 Celsius (<1F) less mild.

The highest temperature recorded during the month was 21.1 Celsius (70F) on the 29th. This was the highest known temperature in the area so late in the autumn. On 4 other occasions, the 3rd, 18th, 19th and 23rd, maxima reached, or exceeded 20 Celsius (68F), with the highest value of 20.8 Celsius (69F) recorded on the 18th. In a very consistently mild month, all other days, bar 2, had maximum temperatures between 17 and 20 Celsius (63-68F). The 2 slightly less mild days were the 14th, with a high of 16.8 (62F), and the 30th with a maximum of 16.7 Celsius (62F). These 2 less mild days still had maximum temperatures around 1 Celsius (<2F) above the October average.

There were many mild nights during October, and on 3 occasions the temperature stayed above 16 Celsius (61F). On the 5th, a low of 16.7 Celsius (62F) was recorded, and on both the 23rd and 26th a minimum of 16.2 Celsius (61F) occurred. A further 4 nights had minima above 15 Celsius (59F). On  many nights (11) minimum temperatures were between 12 and 15 Celsius (54-59F), but there were some cooler nights, these mainly occurring during the first half of October. On 8 nights the temperature dipped below 10 Celsius (50F), but only 1 of these cooler nights occurred after mid month. On the 18th, a minimum of 7 Celsius (45F) occurred, but between the 6th and 12th there were 4 nights with minima below 7 Celsius (45F), and 2 of these nights had temperatures under 6  Celsius. The 12th had a low of 5.8 Celsius (42F) and 5.7 Celsius (42F) was recorded on the 9th. 

The sea temperature decreased erratically from 17 Celsius (63F) at the beginning of October to 16 Celsius (61F) at the end of the month.

Frost

There was no frost in Shoreham during October. The lowest grass temperature was 3.3 Celsius (38F),  recorded on the 12th. 

Rain

Rainfall in October amounted to 81.4 millimetres (3.2 ins.), which was about 30% below average.  Measurable rain fell on 21 days, which was 2 days above the average, and wet days (when 1 millimetre (0.04 ins.), or more, of rain falls) numbered 14,  which was 1 day above the average.  The first 11 days of the month were changeable,  but 4 days were completely dry, and the total for the period was only 8.8 millimetres (0.35 ins.) The highest daily total during this period was 3.0 millimetres (0.1 ins.) on the 1st. On the night of the 12th/13th there was heavy rain and this amounted to 14.6 millimetres (0.57 ins.), making the 12th the wettest day of the month. A further 13.2 millimetres (0.52 ins.) was recorded on the 16th, and during the second half of October there was only 1 completely dry day, that was the 18th. However, on most days, amounts were quite small. The exceptions were the 20th with 6 millimetres (0.24 ins.), the 22nd with 5.4 millimetres (0.21 ins.) and the 23rd with 12.4 millimetres (0.49 ins.). Both the 29th and 31st each had 4 millimetres (0.16 ins.)  

Hail

No hail was observed in this part of Shoreham.

Thunder

Thunderstorms occurred on 2 days during October. On the 20th a storm lasted for about half hour around mid-morning. On the 20th there was thunder and lightning for 20 minutes before dawn.

Snow

No sleet or snow occurred in Shoreham.

Wind

Pressure was close to average for October with the main centres of the anticyclones to the south and east of the British Isles. As a result, southwesterly winds prevailed and accounted for over half the daily readings. Winds were often quite brisk, except during the second week of the month when they were lighter and more variable in direction. At Shoreham Airport,  southwesterly gusts reached 39 knots (45 mph) on the afternoon of the 5th, and 31 knots (34 mph), also from the southwest, was recorded in the evening of the 7th. After the spell with lighter winds, southwesterly gusts of 34 knots (39 mph) were recorded on the evening of the 15th, and 36 knots (41 mph) on the evening of the 21st. The late evening of the 23rd  and the early hours of the 24th were particularly windy with southwesterly gusts rising from 39 knots (45 mph) at 2200 UTC ,  to 47 knots (55 mph) at 0200 UTC. A southwesterly gust of 31 knots (34 mph) was recorded late in the morning on the 26th, and on the last day of the month the final 2 hours of the evening became windy with southwesterly gusts reaching 42 knots (48 mph).       

Fog

No fog was observed in this part of Shoreham.

Statistics for October 2022

Very Wet

Temperatures

The average maximum temperature during September 2022 in Shoreham was 20.4 Celsius (69F), and that was less than 0.5 Celsius (<1F) above normal for the time of year. The average minimum temperature was 12.1 Celsius (54F), and that was average for September.

The highest temperature recorded during the month was 25.8 Celsius (78F) on the 1st. The temperature reached 25.1 Celsius (77F) on the 2nd, and highs exceeding 24 Celsius (75F) occurred on the 4th, 5th and 12th. A further 4 days had maxima above 22 Celsius (72F), with all of these warmer days occurring before the 13th. Temperatures also topped 20 Celsius (68F) on the 10th, 14th, 19th, 21st and 22nd. There were no particularly cool days during September, but on 8 occasions the temperature failed to reach 8 Celsius (64F). The 16th had a maximum of 17.9 Celsius (64F), but the remainder of these less warm days occurred after the 22nd. On 3 of these days, the temperature stayed below 17 Celsius (63F) with highs of 16.2 Celsius (61F), 16.7 Celsius (62F) and 16.5 Celsius (62F) on the 26th, 27th and 28th respectively.

There were several pleasantly warm nights during September, and on 10 occasions, all before mid-month,  the temperature stayed above 15 Celsius (59F). On 2 of these nights the temperature remained above 17 Celsius (63F). On the 4th, a low of 17.4 Celsius (63F) occurred, with 17.9 Celsius (64F) recorded on the 13th. During the first half of September, the lowest minimum was 12.2 Celsius (54F) on the 12th,  but nights were generally much cooler after mid month, with only 1 night, the 23rd with a low of 14.1 Celsius (57F), having a minimum temperature above 12.2 Celsius (54F). and on 10 nights the temperature dipped below 10 Celsius (50F). Minima below 7 Celsius (45F) occurred on 3 of these nights, with lows of 4.9 Celsius (41F), 4.7 Celsius (40F) and 5.2 Celsius (41F), on the 17th, 29th and 30th respectively. 

The sea temperature was around 21 Celsius (70F) at first, steadily descending to 17 Celsius (63F) by the end of the month.

Frost

There was no frost in Shoreham during September. The lowest grass temperature was 1.1 Celsius (34F),  recorded on the 17th. 

Rain

Rainfall in September amounted to 118.6 millimetres (4.7 ins.), which was more than double the average for the month. It was the wettest September in the area for 22 years.  Measurable rain fell on 14 days, which was 2 days above the average, and wet days (when 1 millimetre (0.04 ins.), or more, of rain falls) numbered 12,  which was 4 days above the average. A total of 8 millimetres (0.3 ins.) of rain fell on the evening of the 1st, and although the following 2 days were largely dry, a spell of very wet weather ensued. Between the 4th and 8th (5 days) almost 65 millimetres (2.5 ins.) of rain fell, and included daily totals of 31.6 millimetres (1.2 ins.) on the on the 7th, and 17.6 millimetres (0.7 ins.) on the 8th. After 3 mainly dry days, light rain on the 12th was followed by 11 millimetres (0.4 ins.) on the 13th. No measurable rain fell between the 15th and 21st, but although the second half of September was drier than the first half, there were 6 millimetres (0.25 ins) of rain on the 22nd, another 10 millimetres (0.4 ins.) on the 23rd, and the month ended with 13 millimetres (0.5 ins.) on the 30th.  

Hail

No hail was observed in this part of Shoreham.

Thunder

Thunderstorms occurred on 5 days during September. Showers turned thundery for a while on the evening of the 1st, and there was quite intense thunder and lightning during the evening of the 4th. Although these storms moved away soon after midnight, further storms broke out during the evening of the 5th. Thunderstorms occurred mid-evening on the 7th and 1 rumble of thunder was heard mid-morning on the 8th.

Snow

No sleet or snow occurred in Shoreham.

Wind

Pressure was lower than average across Britain, but winds were not particularly strong, except occasionally during the second and last weeks of the month. Southeasterly winds were absent, with breezes from the northwest and southwest quadrants dominant, although a few days with northeasterly winds occurred early in the month. At Shoreham Airport, a southwesterly gust of 30 knots (34 mph) occurred in association with thunderstorms around midnight on the 5th, and early in the evening of the 6th, there was southwesterly gust of 41 knots (47 mph). The 8th was a breezy day with gusts in the afternoon peaking at 33 knots (37 mph). No further gusts above 30 knots (34 mph) occurred until the evening of the 30th, when several gusts from the southwest reached 40 knots (46 mph).      

Fog

No fog was observed in this part of Shoreham.

Statistics for September 2022