Very Warm and Exceptionally Dry

Temperatures

The average maximum temperature during June 2018 in Shoreham was 22.1 Celsius (72F), and that was around 4 degrees Celsius (7F) above normal for the time of year. The average minimum temperature was 12.7 Celsius (55F), and that was  about 0.5 degrees Celsius (<1F) above  the June normal. 

The highest temperature recorded during the month was 28.6 Celsius (84F) on the 30th, but there were 3 other days when the temperature rose above 25 Celsius (77F), All the very warm days were at the end of the month,  with highs of  26.9 Celsius (80F), 27.7  Celsius (82F) and 27.4 Celsius (81F) on the 27th, 28th and 29th respectively. It was pleasantly warm on many other days, with a total of 17 days having maximum temperatures between 21 and 25 Celsius (70-77F). There were no particularly cool days during June, although on 4 occasions the temperature failed to reach 19 Celsius (66F). On 2 of these cooler days the temperature stayed below 18 Celsius (64F).  On the 5th a high of 17.9 Celsius (64F) was recorded, but the first day of the month was the coolest with a high of  17.0  Celsius (63F).

Many nights had clear skies and light winds, and this allowed  temperatures to fall steadily. However, there were a few fairly warm nights, but only 1 had a minimum above 15 Celsius (59F). On the night of the 18th/19th a low of 16.1 Celsius (61F) was recorded. On most nights (26), the minimum temperature was between 11 and 15 Celsius (52-59F), but there were a couple of chilly nights. On the 21st/22nd a minimum of 9.9 Celsius (50F) occurred, but the coolest night of the month was the 12th/13th with a low of 9.1 Celsius (48F). 

The sea temperature rose from around 16 Celsius (61F) at the beginning of June, to 18 or 19 Celsius (64-66F) at the end of the month.

Frost

There were no frosts during June. The lowest grass temperature was 5.6 Celsius (42F) on the night of the 12th/13th.   

Rain

There were 1.2  millimetres (0.05 ins.) of rain during June and that was less than 3% of the monthly average. It  was the driest June in the area since 1921, or perhaps since rainfall records began during the 19th Century. In June 1921, there were only a limited number of authenticated measuring sites in Sussex, but at Victoria Park in Worthing a total of 1.8 millimetres (0.07 ins.) fell, and at Balcombe only 0.5 millimetres (0.02 ins.) of rain were recorded. In June 2018, there were only 3 days with measurable rain , and that was 7 days below normal. However, the first of these so-called rain days,  had no conventional precipitation. Overnight sea fog persisted through the morning and 0.2 millimetres of ‘rain’ were deposited in the rain-gauge.  Spots of rain early on the 7th were too few to measure, but rain on the morning of the 14th produced the wettest day of the month with a total of 0.8 millimetres (0.03 ins.). Drizzly rain on the afternoon of the 16th was just heavy enough to give 0.2 millimetres (0.01 ins.) of rain, but the light drizzle  on both the 17th and 19th failed to add to the total for the month, with last 11 days of June staying dry.

Hail

There was no hail observed in this part of Shoreham during June.

Thunder

There was no thunder heard in this part of Shoreham during June.

Wind

The winds during June were fairly evenly balanced between southwesterlies and northeasterlies. Unsurprisingly, the southwest winds were associated with the cooler days at the beginning of June and around mid month. The northeasterly breezes were incidental to the warmer days, especially at the end of the month.    Winds were generally gentle or moderate by day, often falling light at night. There were exceptions, and at Shoreham Airport southwesterly gusts reached 30 knots (34 mph) on the morning of the 14th,  with 28 knots (32 mph) recorded on the 16th, 17th and 18th, again from the southwest.     

Fog

Sea fog occurred on  the morning of the 1st, before lifting into low cloud. However, fog returned for a while during the evening.

Statistics for June 2018