Welwyn Garden City
September
Weather in Welwyn Garden City for September 2025
Your guide to Welwyn Garden City weather in September - trends and predictions
In general, the average temperature in Welwyn Garden City at the beginning of September is 23.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.7 °C by the end of September.
Welwyn Garden City in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 76.2 mm.
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Temperatures
Rain 🌧️
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12
Dry days
18
Rainy days
0
Snow days
20°/12°
Temperatures
21 km/h
Avg max wind
73 %
Avg humidity
Welwyn Garden City in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2 23° | 3  22° | 4  22° | 5  23° | 6 27° | 7 26° |
| 8  23° | 9 23° | 10 24° | 11 19° | 12 16° | 13 17° | 14 19° |
| 15 22° | 16 22° | 17  20° | 18  22° | 19  20° | 20  20° | 21 20° |
| 22 18° | 23 17° | 24 18° | 25 18° | 26  19° | 27 16° | 28 15° |
| 29 15° | 30 16° |
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Temperatures trend during September in Welwyn Garden City
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Mist | 23° /13° | 3.1 mm | 6 | |
| 2 Sept. | Mist | 23° /15° | 0.7 mm | 5 | |
| 3 Sept. | Overcast | 22° /13° | 0.7 mm | 5 | |
| 4 Sept. | Sunny | 22° /13° | 3.3 mm | 6 | |
| 5 Sept. | Cloudy | 23° /13° | 3.5 mm | 5 | |
| 6 Sept. | Cloudy | 27° /16° | 0.9 mm | 6 | |
| 7 Sept. | Sunny | 26° /16° | 3 mm | 7 | |
| 8 Sept. | Partly cloudy | 23° /16° | 8.2 mm | 6 | |
| 9 Sept. | Sunny | 23° /14° | 0 mm | 6 | |
| 10 Sept. | Partly cloudy | 24° /14° | 1.5 mm | 6 | |
| 11 Sept. | Cloudy | 19° /11° | 0.7 mm | 4 | |
| 12 Sept. | Mist | 16° /10° | 0.5 mm | 4 | |
| 13 Sept. | Overcast | 17° /9° | 0 mm | 4 | |
| 14 Sept. | Partly cloudy | 19° /10° | 0 mm | 6 | |
| 15 Sept. | Partly cloudy | 22° /11° | 0 mm | 5 | |
| 16 Sept. | Partly cloudy | 22° /11° | 0 mm | 6 | |
| 17 Sept. | Moderate rain | 20° /12° | 2.5 mm | 5 | |
| 18 Sept. | Light rain shower | 22° /11° | 2.8 mm | 5 | |
| 19 Sept. | Light rain | 20° /12° | 1.2 mm | 5 | |
| 20 Sept. | Moderate or heavy rain shower | 20° /13° | 9.2 mm | 5 | |
| 21 Sept. | Patchy light drizzle | 20° /11° | 2.6 mm | 5 | |
| 22 Sept. | Light rain shower | 18° /12° | 9.3 mm | 4 | |
| 23 Sept. | Patchy rain possible | 17° /10° | 0.2 mm | 4 | |
| 24 Sept. | Overcast | 18° /11° | 1.8 mm | 4 | |
| 25 Sept. | Overcast | 18° /12° | 2.5 mm | 5 | |
| 26 Sept. | Thundery outbreaks possible | 19° /11° | 3.3 mm | 5 | |
| 27 Sept. | Patchy rain possible | 16° /9° | 3.7 mm | 4 | |
| 28 Sept. | Overcast | 15° /8° | 0.1 mm | 4 | |
| 29 Sept. | Patchy rain possible | 15° /9° | 1.7 mm | 4 | |
| 30 Sept. | Cloudy | 16° /9° | 9.4 mm | 4 | |
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Important Notice
Our weather forecast for Welwyn Garden City in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Welwyn Garden City forecast closer to your planned date for the most up-to-date weather information.
Welwyn Garden City in September - FAQ
What are the expected maximum and minimum temperatures in Welwyn Garden City during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Welwyn Garden City during September?
Moderate rainfall is anticipated in Welwyn Garden City during September, with a total of 76.2 mm spread over approximately 18 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Welwyn Garden City during September?
The average wind speed in Welwyn Garden City during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Welwyn Garden City
Explore the daily rainfall trends and prepare for Welwyn Garden Citys September weather 💧
UV exposure in Welwyn Garden City during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Welwyn Garden City?Get accurate weather forecasts for Welwyn Garden City, located at latitude 51.802 and longitude -0.207. Stay updated with localized weather information tailored for Welwyn Garden City.
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