Louisville Weather in September

What's the weather like in Louisville (Kentucky) in September 2025?

The climate in Louisville during September can be summarized as warm, humid and reasonably dry.

September is in the fall / autumn in Louisville 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 (58°F) is normal.

Louisville weather averages (imperial / metric)
Daytime temperature 27°C 80.5°F
Nightly temperature 14.3°C 57.7°F
Average temperature 20.6°C 69.1°F
Daily sunshine 8.4 hrs
Avg rainfall 80 mm 3.1 ins
Rainy days 8 days
Sea temperature 22.6°C 72.7°F
Humidity 73%
Windspeed 11.5kph 7 mph

On average September is the 3rd driest month of the year in Louisville with around 80mm 3.1 inches of rain making it a reasonably dry 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 Louisville

Louisville average temperature in September

September rainfall

Louisville average rain in September

September hourly sunshine

Louisville 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 Louisville 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

Louisville weather stats

Louisville weather statistics
Hottest month: July 30.7°C 87.3°F
Driest month: October 69mm 2.7ins
Sunniest month: July 10.1hrs
Coldest month: January 4.5°C 40.1°F
Wettest month: May 118mm 4.6ins
Map showing location of Louisville (38.25424, -85.75941) Louisville map pin © Google

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