The temperatures in Welwyn Garden City in September are usually low and can range between 12°C and 19°C.
You can expect about 3 to 8 days of rain in Welwyn Garden City during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Welwyn Garden City in September 2025.
If you’re planning to visit Welwyn Garden City in the near future, we highly recommend that you review the 14 day weather forecast for Welwyn Garden City before you arrive.
Temperatures
19° / 12°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
45
mm
Sun Hours
8.9
Hrs
