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 sees moderate rainfall in September, averaging 7 rainy days.
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23
Dry days
7
Rainy days
0
Snow days
22°/14°
Temperatures
21 km/h
Avg max wind
70 %
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 22° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Welwyn Garden City during September?
In September, Welwyn Garden City can expect light to moderate rainfall, totaling 37.3 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
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.
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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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