Weather in Louisville, Kentucky for September 2025
Special Weather Statement - See hour by hour.
Until now, September 2025 in Louisville is cooler than usual, with temperatures averaging 25.6 °F, this is -3.3 °F below the typical seasonal average.
The forecast for the upcoming days in Louisville predicts a temperature of 29.9 °F, which is slightly above the historical average.
In general, the average temperature in Louisville at the beginning of September is 29.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.7 °F by the end of September.
Louisville experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 170.8 mm.
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Louisville Weather September
Temperatures trend during September in Louisville
September weather in Louisville day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 31° /16° | 0.2 mm | 7 | |
| Sept. 2 |  Mist | 30° /17° | 1.5 mm | 7 | |
| Sept. 3 |  Partly cloudy | 29° /17° | 1.2 mm | 6 | |
| Sept. 4 | Partly cloudy | 29° /19° | 20.9 mm | 7 | |
| Sept. 5 |  Overcast | 31° /18° | 3.5 mm | 7 | |
| Sept. 6 |  Light rain shower | 29° /17° | 11.9 mm | 6 | |
| Sept. 7 | Overcast | 25° /12° | 0.3 mm | 6 | |
| Sept. 8 | Sunny | 26° /10° | 0.5 mm | 6 | |
| Sept. 9 | Overcast | 27° /13° | 0 mm | 6 | |
| Sept. 10 | Partly cloudy | 30° /15° | 0 mm | 7 | |
| Sept. 11 | Mist | 30° /16° | 0 mm | 7 | |
| Sept. 12 | Overcast | 29° /17° | 0 mm | 7 | |
| Sept. 13 | Mist | 28° /15° | 3.4 mm | 7 | |
| Sept. 14 | Partly cloudy | 35° /22° | 0 mm | 1.6 | |
| Sept. 15 | Partly cloudy | 34° /21° | 0 mm | 1.5 | |
| Sept. 16 | Partly cloudy | 31° /24° | 0 mm | 1.5 | |
| Sept. 17 | Sunny | 34° /20° | 0 mm | 1.5 | |
| Sept. 18 | Sunny | 35° /21° | 0 mm | 0 | |
| Sept. 19 | Sunny | 32° /21° | 0 mm | 7 | |
| Sept. 20 | Sunny | 33° /20° | 0.1 mm | 6 | |
| Sept. 21 | Patchy rain possible | 28° /18° | 0.8 mm | 5 | |
| Sept. 22 | Partly cloudy | 28° /19° | 0 mm | 6 | |
| Sept. 23 | Patchy rain possible | 22° /18° | 3 mm | 4 | |
| Sept. 24 | Patchy rain possible | 21° /18° | 1 mm | 4 | |
| Sept. 25 | Sunny | 26° /16° | 0 mm | 5 | |
| Sept. 26 | Sunny | 28° /15° | 0 mm | 6 | |
| Sept. 27 | Sunny | 31° /17° | 0 mm | 6 | |
| Sept. 28 |  Patchy light rain with thunder | 23° /17° | 75.3 mm | 5 | |
| Sept. 29 | Mist | 25° /15° | 15.1 mm | 6 | |
| Sept. 30 | Mist | 26° /15° | 0 mm | 6 | |
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Louisville in September - FAQ
September rainfall patterns in Louisville
UV exposure in Louisville during September
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Where is Louisville?Get accurate weather forecasts for Louisville, located at latitude 38.254 and longitude -85.759. Stay updated with localized weather information tailored for Louisville.