Corydon Weather in September

What's the weather like in Corydon (Iowa) in September 2025?

The climate in Corydon during September can be summarized as warm and damp.

September is in the fall / autumn in Corydon and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 25°C (76°F), whilst at night 11°C (52°F) is normal.

Corydon weather averages (imperial / metric)
Daytime temperature 24.7°C 76.4°F
Nightly temperature 11.4°C 52.4°F
Average temperature 18°C 64.4°F
Daily sunshine 8.5 hrs
Avg rainfall 105 mm 4.1 ins
Rainy days 9 days
Sea temperature 19.6°C 67.3°F
Humidity 72%
Windspeed 15.5kph 10 mph

On average September is the 4th wettest month of the year in Corydon with around 105mm 4.1 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 8.5 hours of sunshine per day.

September temperatures in Corydon

Corydon average temperature in September

September rainfall

Corydon average rain in September

September hourly sunshine

Corydon 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 Corydon 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

Corydon weather stats

Corydon weather statistics
Hottest month: July 30.2°C 86.4°F
Driest month: February 26mm 1ins
Sunniest month: July 11.3hrs
Coldest month: January -0.6°C 30.9°F
Wettest month: July 119mm 4.7ins
Map showing location of Corydon (40.75695, -93.31882) Corydon map pin © Google

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