Harrisonville Weather in September

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

The climate in Harrisonville during September can be summarized as warm, humid and damp.

September is in the fall / autumn in Harrisonville and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 14°C (57°F) is normal.

Harrisonville weather averages (imperial / metric)
Daytime temperature 27.3°C 81.1°F
Nightly temperature 14.1°C 57.4°F
Average temperature 20.7°C 69.3°F
Daily sunshine 8.5 hrs
Avg rainfall 119 mm 4.7 ins
Rainy days 8 days
Sea temperature 20.8°C 69.5°F
Humidity 71%
Windspeed 15.1kph 9 mph

On average September is the 3rd wettest month of the year in Harrisonville with around 119mm 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 8.5 hours of sunshine per day.

September temperatures in Harrisonville

Harrisonville average temperature in September

September rainfall

Harrisonville average rain in September

September hourly sunshine

Harrisonville 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 Harrisonville 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

Harrisonville weather stats

Harrisonville weather statistics
Hottest month: July 32.2°C 90°F
Driest month: January 33mm 1.3ins
Sunniest month: July 11.3hrs
Coldest month: January 3.5°C 38.3°F
Wettest month: June 138mm 5.4ins
Map showing location of Harrisonville (38.65334, -94.34884) Harrisonville map pin © Google

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