The temperatures in Slough in September are quite cold with temperatures between 9°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Slough 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 Slough in September 2025.
If you’re planning to visit Slough in the near future, we highly recommend that you review the 14 day weather forecast for Slough before you arrive.
Temperatures
17° / 9°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
36
mm
Sun Hours
8.0
Hrs
