Clinton Weather in September

What's the weather like in Clinton (Missouri) in September 2025?

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 27°C (81°F), whilst at night 13°C (56°F) is normal.

Clinton weather averages (imperial / metric)
Daytime temperature 27.1°C 80.8°F
Nightly temperature 13.1°C 55.6°F
Average temperature 20.1°C 68.2°F
Daily sunshine 8.4 hrs
Avg rainfall 118 mm 4.7 ins
Rainy days 8 days
Sea temperature 21°C 69.8°F
Humidity 72%
Windspeed 15.1kph 9 mph

On average September is the 3rd wettest month of the year in Clinton with around 118mm 4.7 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 8.4 hours of sunshine per day.

September temperatures in Clinton

Clinton average temperature in September

September rainfall

Clinton average rain in September

September hourly sunshine

Clinton average rain in September

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.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Clinton weather stats

Clinton weather statistics
Hottest month: July 32.2°C 90°F
Driest month: January 36mm 1.4ins
Sunniest month: July 11.2hrs
Coldest month: January 3.3°C 37.9°F
Wettest month: May 132mm 5.2ins
Map showing location of Clinton (38.36863, -93.77827) Clinton map pin © Google

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