The provisional mid-month statistics for September are in and clearly show the unseasonably warm weather the UK has been experiencing.
In the first half of September the UK was on average warmer than June, July and August with a mean temperature of 15.9°C, 3.3°C higher than the average September. Norfolk and Suffolk have seen the biggest variance from the average with temperatures so far 4.3°C over the September average.
The hottest day of the year was recorded in Gravesend on 13 September at 34.4°C, the last time the hottest day was in the month of September was in 1954 and recorded at Regents Park. The last time there were three consecutive days above 30°C in September was 1929.
Minimum temperatures were also significantly higher than average. The minimum temperatures in North West England and Eastern Scotland were 3.8°C warmer than average.
These higher temperatures both through the day and night have been caused by warm and humid air being drawn up from the Continent. The map below clearly shows the increased average maximum temperatures across the UK in September so far.
|Max temp (°C)||Min temp (°C)||Mean temp (°C)|
|1-14 September 2016||Act||Diff from avg (8110)||Act||Anom (8110)||Act||Anom (8110)|
Although unseasonably warm, there have also been some wet conditions across the UK. Northern Ireland has had 71% of its average rainfall for the month, with County Fermanagh already surpassing the expected average with 101.8mm of rain so far this month. Some of this rainfall has been intense causing some surface water flooding. The early hours of 16 September saw Swanage in Dorset receive 31.8 mm and Cavendish in Suffolk 22.2 mm of rain in an hour.
|1-14 September 2016||Act||% of avg (8110)|
We are expecting a return to more usual September weather across the UK with temperatures reducing and frontal systems coming in from the Atlantic. We expect to see a continuation of the North West/South East split through the second half of the month, with the wettest and windiest conditions in the North West and drier and brighter weather in the South East with some rainfall as you would expect for the time of year.
You can keep up to date with the weather using our forecast pages and by following us onTwitter and Facebook, as well as using new mobile app which is available for iPhone from the App store and for Android from the Google Play store.