The temperatures in Northamptonshire in September are usually low and can range between 11°C and 19°C.
You can expect about 3 to 8 days of rain in Northamptonshire 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 Northamptonshire in September 2025.
If you’re planning to visit Northamptonshire in the near future, we highly recommend that you review the 14 day weather forecast for Northamptonshire before you arrive.
Temperatures
19° / 11°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
39
mm
Sun Hours
8.6
Hrs
