The temperatures in Stevenage 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 Stevenage 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 Stevenage in September 2025.
If you’re planning to visit Stevenage in the near future, we highly recommend that you review the 14 day weather forecast for Stevenage before you arrive.
Temperatures
19° / 12°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
45
mm
Sun Hours
8.9
Hrs
