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Welwyn Garden City
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Weather in Welwyn Garden City for September 2026

Your guide to Welwyn Garden City weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Welwyn Garden City is slightly cooler than the historical average by 0.7 °C.

  • The forecast for the next days in Welwyn Garden City predicts temperatures to be around 23 °C, close to the historical average.

  • In general, the average temperature in Welwyn Garden City at the beginning of September is 22.6 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 23 °C by the end of September.

    • Rain 🌧️

  • Welwyn Garden City experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 66.1 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
9
Dry days
Average rainy days
21
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/12°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Welwyn Garden City Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain shower
22°
2
Mist
21°
3
Overcast
22°
4
Sunny
21°
5
Cloudy
22°
6
Overcast
25°
7
Sunny
25°
8
Partly cloudy
21°
9
Overcast
21°
10
Light rain shower
22°
11
Cloudy
20°
12
Mist
18°
13
Overcast
18°
14
Partly cloudy
19°
15
Patchy rain possible
21°
16
Patchy rain possible
20°
17
Moderate rain
19°
18
Overcast
21°
19
Partly cloudy
22°
20
Overcast
19°
21
Sunny
22°
22
Sunny
24°
23
Overcast
22°
24
Sunny
19°
25
Sunny
20°
26
Sunny
26°
27
Sunny
22°
28
Sunny
25°
29
Sunny
26°
30
Overcast
23°

Temperatures trend during September in Welwyn Garden City

See the weather trend as well as the moving average line

September weather in Welwyn Garden City day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 22° /12° 2 mm 5
2 Sept. Mist
Mist
 21° /13° 1.5 mm 4
3 Sept. Overcast
Overcast
 22° /14° 2.6 mm 4
4 Sept. Sunny
Sunny
 21° /12° 5.1 mm 4
5 Sept. Cloudy
Cloudy
 22° /12° 1.8 mm 5
6 Sept. Overcast
Overcast
 25° /15° 0.4 mm 5
7 Sept. Sunny
Sunny
 25° /15° 1.6 mm 5
8 Sept. Partly cloudy
Partly cloudy
 21° /14° 7 mm 5
9 Sept. Overcast
Overcast
 21° /12° 0 mm 5
10 Sept. Light rain shower
Light rain shower
 22° /12° 2.1 mm 4
11 Sept. Cloudy
Cloudy
 20° /11° 0.9 mm 4
12 Sept. Mist
Mist
 18° /10° 0.8 mm 3
13 Sept. Overcast
Overcast
 18° /11° 1.9 mm 3
14 Sept. Partly cloudy
Partly cloudy
 19° /11° 1.5 mm 4
15 Sept. Patchy rain possible
Patchy rain possible
 21° /11° 0.1 mm 4
16 Sept. Patchy rain possible
Patchy rain possible
 20° /11° 0.1 mm 4
17 Sept. Moderate rain
Moderate rain
 19° /11° 2.2 mm 4
18 Sept. Overcast
Overcast
 21° /12° 1.5 mm 4
19 Sept. Partly cloudy
Partly cloudy
 22° /13° 0.8 mm 6
20 Sept. Overcast
Overcast
 19° /13° 0 mm 3.4
21 Sept. Sunny
Sunny
 22° /11° 0 mm 3.9
22 Sept. Sunny
Sunny
 24° /15° 0 mm 3.7
23 Sept. Overcast
Overcast
 22° /11° 0.1 mm 3.1
24 Sept. Sunny
Sunny
 19° /9° 0 mm 5
25 Sept. Sunny
Sunny
 20° /11° 0 mm 5
26 Sept. Sunny
Sunny
 26° /13° 0 mm 7
27 Sept. Sunny
Sunny
 22° /15° 0 mm 6
28 Sept. Sunny
Sunny
 25° /15° 0 mm 6
29 Sept. Sunny
Sunny
 26° /14° 0 mm 7
30 Sept. Overcast
Overcast
 23° /18° 0 mm 5
Next
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.
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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 19° 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 66.1 mm spread over approximately 21 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 22 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 💧
Typically, Welwyn Garden City has 21 rainy days in September with a total of 66.1 mm of rainfall.

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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Location coordinates 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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