The climate in Clinton during September can be summarized as warm, humid and damp.
September is in the fall / autumn in Clinton and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 28°C (83°F), whilst at night 16°C (60°F) is normal.
Daytime temperature | 28.1°C 82.6°F |
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Nightly temperature | 15.5°C 59.9°F |
Average temperature | 21.8°C 71.2°F |
Daily sunshine | 9.1 hrs |
Avg rainfall | 110 mm 4.3 ins |
Rainy days | 8 days |
Sea temperature | 23.3°C 73.9°F |
Humidity | 73% |
Windspeed | 12.6kph 8 mph |
On average September is the 5th wettest month of the year in Clinton with around 110mm 4.3 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 9.1 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 Clinton in September 2025.
Best places to visit in September
Hottest month: | July | 32.7°C 90.9°F |
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Driest month: | January | 73mm 2.9ins |
Sunniest month: | July | 11.6hrs |
Coldest month: | January | 8.1°C 46.6°F |
Wettest month: | May | 134mm 5.3ins |