Sussex Weather in September

The climate in Sussex during September can be summarized as mild and a little damp.

September is in the fall / autumn in Sussex and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 19°C (66°F), whilst at night 7°C (45°F) is normal.

On average September is the 5th driest month of the year in Sussex with around 92mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.2 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sussex in September 2024.