The climate in Clinton during September can be summarized as hot, 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 31°C (87°F), whilst at night 19°C (67°F) is normal.
Daytime temperature | 30.8°C 87.4°F |
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Nightly temperature | 19.2°C 66.6°F |
Average temperature | 25°C 77°F |
Daily sunshine | 8.3 hrs |
Avg rainfall | 111 mm 4.4 ins |
Rainy days | 9 days |
Sea temperature | 28.4°C 83.1°F |
Humidity | 77% |
Windspeed | 11.5kph 7 mph |
On average September is the 2nd driest month of the year in Clinton with around 111mm 4.4 inches of rain making it a damp time to visit. This rainfall is typically spread over 9 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 Clinton in September 2025.
Best places to visit in September
Hottest month: | July | 32.8°C 91°F |
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Driest month: | October | 86mm 3.4ins |
Sunniest month: | October | 8.3hrs |
Coldest month: | January | 14.8°C 58.6°F |
Wettest month: | December | 159mm 6.3ins |