A warm, but also a wet and windy month

Temperatures

The average maximum temperature during July 2017 in Shoreham was 22.5 Celsius (73F), and that was 2 Celsius (3.5F) above normal for the time of year. The average minimum temperature was 14.8 Celsius (59F), and that was almost 1 Celsius (2F) above the normal July value.

The highest temperature recorded during the month was 29.7 Celsius (86F) on the 18th, but there were 4 other warm days when the temperature rose above 25 Celsius (77F). All of the warm weather occurred during the first 18 days of the month, including maxima of 27.3 Celsius (81F) on the 6th and 27.1 Celsius (81F) on the 9th.; after that, the only maximum above 23 Celsius (73F) was the 23.4 Celsius (74F) recorded on the 21st. There were many days when temperatures rose to between 20 and 23 Celsius (68-73F), but there were 4 days when maxima remained below 20 Celsius (68F). The only day when the temperature failed to reach 19 Celsius (66F) was the 26th when a high of 18.6 Celsius occurred.

There were several warm nights during July. and on 13 occasions the temperature remained above 15 Celsius (59F). On 5 of these warmer nights minima were above 17 Celsius (63F), including a low of 18.2 Celsius (65F) on the 6th. There were no particularly cool nights during July, although on 3 nights minima were below 13 Celsius (55F).  On the 4th a low of  11.6 Celsius (53F) occurred, but the coolest night of the month was the 22nd/23rd when a minimum of 10.3 Celsius (50F) was measured..

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

Frost

There were no frosts in Shoreham during July. The lowest grass minimum was 7.8 Celsius (46F) on the 4th.

Rain

There were 81.8 millimetres (2.1 ins.) of rain during July, and that was approaching 50% above average. Rain fell on 11 days, close to what one would expect at this time of year, and wet days ( rainfall of 1 millimetre (0.04 ins) or more)  amounted to 9 days, also close to what can be expected in July. No measurable rain fell during the first 10 days of July, but rain set in during the afternoon of the 11th and became heavy at times overnight. The total for the rainfall day* was 26.6 millimetres  (1.05 ins.).  A short dry spell ensued but rain on the evening of the 18th became torrential for a while overnight and resulted in a total of 25.6 millimetres (1 inch) of rain. A changeable period of weather followed, and between the 18th and 29th there was only 1 completely dry day, the 21st. Some heavy bursts of rain occurred, with 7.8 millimetres (0.3 ins.) measured on the 21st, almost 5 millimetres (0.2 ins.) on the 22nd, and 9 millimetres (0.35 ins.) on the 29th. The last 2 days of the month were dry.

*A rain day is from 0900-0900 UTC

Hail

There was no hail reported  in Shoreham during July.

Thunder

There were 3 days when thunder was observed in Shoreham. On the evening of the 18th thunderstorms broke out, with these becoming severe in the early hours of the 19th. Continuous thunder and lightning occurred for over an hour before they finally moved away to the north. At one stage, the rain was falling at a rate of almost 90 millimetres (3.5 ins.) per hour.  The  last thunderstorm of the month, on the 22nd, was slight, and produced just 2 rumbles in the middle of the afternoon..

Wind

It was a windy July, especially during the second half of the month. Winds from a southwesterly direction accounted for nearly 60% of the observations,  although breezes from a northeasterly point coincided with some of the warm days. The 28th was the windiest day at the Airport with 34 knots (39 mph) recorded.

Fog

There was no fog observed in Shoreham during July.

Statistics for July 2017