The climate in Suffolk during September can be summarized as warm, humid and damp.
September is in the fall / autumn in Suffolk and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 17°C (62°F) is normal.
Daytime temperature | 27°C 80.5°F |
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Nightly temperature | 16.9°C 62.3°F |
Average temperature | 21.9°C 71.4°F |
Daily sunshine | 8.3 hrs |
Avg rainfall | 103 mm 4 ins |
Rainy days | 8 days |
Sea temperature | 24.1°C 75.4°F |
Humidity | 75% |
Windspeed | 14.4kph 9 mph |
On average September is the 3rd wettest month of the year in Suffolk with around 103mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.3 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 Suffolk in September 2025.
Best places to visit in September
Hottest month: | July | 30.6°C 87.1°F |
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Driest month: | November | 73mm 2.9ins |
Sunniest month: | April | 9.1hrs |
Coldest month: | January | 8.9°C 48°F |
Wettest month: | July | 128mm 5ins |