Louisville (KY)
September
Weather in Louisville, Kentucky for September 2026
Your guide to Louisville weather in September - trends and predictions
Until now, September 2026 in Louisville has been significantly warmer than historical averages.
Expect cooler weather in the next days in Louisville with the forecast suggesting a temperature of 29.4 °F, lower than the historical average.
In general, the average temperature in Louisville at the beginning of September is 31.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 26.6 °F by the end of September.
The climate of Louisville in September is notably wet, with an average of 14 rainy days, and a total of 190.2 mm of precipitation.
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Temperatures
Rain 🌧️
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16
Dry days
14
Rainy days
0
Snow days
28°/16°
Temperatures
13 km/h
Avg max wind
63 %
Avg humidity
Louisville Weather September
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Temperatures trend during September in Louisville
See the weather trend as well as the moving average line
September weather in Louisville day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 33° /17° | 0.2 mm | 7 | |
| Sept. 2 | Sunny | 33° /18° | 1.1 mm | 7 | |
| Sept. 3 |  Partly cloudy | 32° /19° | 0.9 mm | 7 | |
| Sept. 4 | Partly cloudy | 32° /20° | 15.7 mm | 7 | |
| Sept. 5 |  Overcast | 33° /20° | 2.7 mm | 7 | |
| Sept. 6 |  Light rain shower | 31° /19° | 8.9 mm | 7 | |
| Sept. 7 | Sunny | 27° /13° | 0.2 mm | 7 | |
| Sept. 8 | Sunny | 28° /13° | 0.4 mm | 7 | |
| Sept. 9 | Overcast | 29° /15° | 0.3 mm | 7 | |
| Sept. 10 | Partly cloudy | 30° /16° | 70.7 mm | 6 | |
| Sept. 11 |  Mist | 29° /17° | 17.4 mm | 6 | |
| Sept. 12 |  Heavy rain | 28° /23° | 100.5 mm | 6.9 | |
| Sept. 13 | Sunny | 32° /22° | 0.2 mm | 7.4 | |
| Sept. 14 | Overcast | 29° /16° | 0.5 mm | 7.4 | |
| Sept. 15 | Sunny | 36° /22° | 1.9 mm | 9 | |
| Sept. 16 | Sunny | 36° /24° | 0.2 mm | 9 | |
| Sept. 17 | Sunny | 36° /26° | 0 mm | 9 | |
| Sept. 18 | Patchy rain possible | 34° /22° | 3.8 mm | 8 | |
| Sept. 19 | Mist | 25° /20° | 5.8 mm | 5 | |
| Sept. 20 | Overcast | 21° /16° | 0.8 mm | 5 | |
| Sept. 21 | Sunny | 24° /11° | 0 mm | 6 | |
| Sept. 22 | Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 23 | Sunny | 29° /17° | 0 mm | 7 | |
| Sept. 24 | Sunny | 25° /13° | 0 mm | 6 | |
| Sept. 25 | Sunny | 31° /14° | 0 mm | 8 | |
| Sept. 26 | Patchy rain possible | 25° /14° | 0.3 mm | 6 | |
| Sept. 27 |  Patchy light rain with thunder | 25° /16° | 27.5 mm | 6 | |
| Sept. 28 | Patchy light rain with thunder | 25° /16° | 50.2 mm | 6 | |
| Sept. 29 | Mist | 27° /15° | 10.1 mm | 6 | |
| Sept. 30 | Mist | 28° /16° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Louisville in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Louisville forecast closer to your planned date for the most up-to-date weather information.
Change Month
Louisville in September - FAQ
What are the expected maximum and minimum temperatures in Louisville during September?
During September, expect a variety of temperatures with highs around 28° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Louisville during September?
Significant rainfall exceeding 190.2 mm is expected in Louisville during September, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Louisville during September?
The average wind speed in Louisville during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Louisville
Explore the daily rainfall trends and prepare for Louisvilles September weather 💧
Typically, Louisville has 14 rainy days in September with a total of 190.2 mm of rainfall.
UV exposure in Louisville during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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