Weather in the United Kingdom for September 2025
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Until now, September 2025 in the United Kingdom is cooler than usual, with temperatures averaging 20.2 °C, this is -2.1 °C below the typical seasonal average.
Expect cooler weather in the next days in the United Kingdom with the forecast suggesting a temperature of 19.6 °C, lower than the historical average.
In general, the average temperature in the United Kingdom at the beginning of September is 22.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.4 °C by the end of September.
United Kingdom experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 78.7 mm.
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United Kingdom Weather September
What’s the Weather Like in United Kingdom This September?
Temperatures trend during September in the United Kingdom
September weather in the United Kingdom day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 22° /14° | 4.1 mm | 5 | |
| 2 Sept. |  Patchy rain possible | 22° /15° | 2.4 mm | 5 | |
| 3 Sept. | Light rain shower | 22° /14° | 1.7 mm | 5 | |
| 4 Sept. | Overcast | 22° /13° | 3 mm | 5 | |
| 5 Sept. | Patchy rain possible | 22° /14° | 2.1 mm | 5 | |
| 6 Sept. |  Sunny | 25° /15° | 2.3 mm | 6 | |
| 7 Sept. | Sunny | 25° /16° | 2.7 mm | 6 | |
| 8 Sept. |  Partly cloudy | 23° /16° | 4.9 mm | 6 | |
| 9 Sept. | Patchy rain possible | 22° /15° | 1.7 mm | 5 | |
| 10 Sept. |  Moderate or heavy rain shower | 22° /15° | 1.7 mm | 5 | |
| 11 Sept. | Patchy rain possible | 20° /13° | 0.9 mm | 5 | |
| 12 Sept. | Partly cloudy | 20° /12° | 0.9 mm | 5 | |
| 13 Sept. | Patchy rain possible | 18° /12° | 3 mm | 4 | |
| 14 Sept. | Patchy rain possible | 17° /11° | 1.9 mm | 0.5 | |
| 15 Sept. | Patchy rain possible | 19° /14° | 0.5 mm | 0.9 | |
| 16 Sept. | Partly cloudy | 18° /13° | 0.1 mm | 0.7 | |
| 17 Sept. | Patchy rain possible | 18° /13° | 3 mm | 0.1 | |
| 18 Sept. | Patchy rain possible | 22° /15° | 0.2 mm | 0.4 | |
| 19 Sept. |  Mist | 24° /15° | 0 mm | 4 | |
| 20 Sept. | Partly cloudy | 24° /17° | 0 mm | 5 | |
| 21 Sept. | Patchy rain possible | 19° /14° | 0.3 mm | 4 | |
| 22 Sept. | Sunny | 20° /13° | 0 mm | 5 | |
| 23 Sept. | Sunny | 19° /11° | 0 mm | 5 | |
| 24 Sept. | Sunny | 20° /13° | 0 mm | 5 | |
| 25 Sept. | Patchy rain possible | 18° /14° | 0.3 mm | 4 | |
| 26 Sept. | Partly cloudy | 20° /12° | 0 mm | 5 | |
| 27 Sept. | Patchy rain possible | 16° /15° | 0.4 mm | 4 | |
| 28 Sept. |  Cloudy | 16° /9° | 3.6 mm | 4 | |
| 29 Sept. | Patchy rain possible | 16° /10° | 0.6 mm | 4 | |
| 30 Sept. | Moderate rain at times | 16° /9° | 9 mm | 4 | |
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Guide for the United Kingdom in September
In the United Kingdom, September marks the transition from summer to autumn, bringing varied weather patterns throughout the month. At the beginning of September, the weather in the UK is typically mild with occasional warm spells, especially in the southern regions.
The average temperatures range from 14° in the north to 17° in the south, with intermittent rainfall and cloudy skies. As the month progresses, the temperatures gradually begin to decrease, particularly in the northern parts of the country.
By the end of September, the weather in the UK becomes noticeably cooler, with average temperatures dropping to around 11° in the north and 14° in the south. The likelihood of rainfall increases, and there may be more overcast days as autumn sets in.
However, it's important to note that the weather in the UK can be quite unpredictable, and variations in temperature and precipitation can occur across different regions.
Overall, September in the United Kingdom offers a mix of transitional weather, making it advisable for travelers to pack layers and be prepared for potential changes in the weather throughout the month.
United Kingdom in September - FAQ
September rainfall patterns in the United Kingdom
UV exposure in the United Kingdom during September
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Where is the United Kingdom?Get accurate weather forecasts for United Kingdom, located at latitude 51.509 and longitude -0.126. Stay updated with localized weather information tailored for United Kingdom.