Jefferson County (Louisville)
September
Weather in Jefferson County for September 2025
Your guide to Jefferson County weather in September - trends and predictions
In general, the average temperature in Jefferson County at the beginning of September is 31.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.3 °F by the end of September.
Jefferson County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 170.8 mm.
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Temperatures
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
28°/16°
Temperatures
13 km/h
Avg max wind
61 %
Avg humidity
Jefferson County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  33° | 2  32° | 3  31° | 4 33° | 5  33° | 6  33° | 7 25° |
| 8  26° | 9 29° | 10 31° | 11 32° | 12 28° | 13 27° | 14 29° |
| 15 30° | 16 30° | 17  28° | 18 26° | 19 28° | 20 31° | 21 32° |
| 22 31° | 23 26° | 24 26° | 25 25° | 26 27° | 27 25° | 28 23° |
| 29 25° | 30 26° |
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Temperatures trend during September in Jefferson County
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September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 33° /16° | 0.3 mm | 8 | |
| Sept. 2 | Mist | 32° /17° | 0 mm | 7 | |
| Sept. 3 | Partly cloudy | 31° /16° | 0 mm | 7 | |
| Sept. 4 | Partly cloudy | 33° /20° | 0 mm | 8 | |
| Sept. 5 | Overcast | 33° /21° | 0 mm | 8 | |
| Sept. 6 | Light rain shower | 33° /20° | 6.5 mm | 7 | |
| Sept. 7 | Overcast | 25° /13° | 0.4 mm | 6 | |
| Sept. 8 | Cloudy | 26° /11° | 0.8 mm | 6 | |
| Sept. 9 | Overcast | 29° /14° | 0 mm | 7 | |
| Sept. 10 | Partly cloudy | 31° /15° | 0 mm | 8 | |
| Sept. 11 | Mist | 32° /15° | 0 mm | 8 | |
| Sept. 12 | Overcast | 28° /18° | 0 mm | 7 | |
| Sept. 13 | Mist | 27° /14° | 5.1 mm | 6 | |
| Sept. 14 | Sunny | 29° /14° | 0.1 mm | 7 | |
| Sept. 15 | Sunny | 30° /15° | 0 mm | 8 | |
| Sept. 16 | Overcast | 30° /14° | 0 mm | 7 | |
| Sept. 17 | Patchy light rain with thunder | 28° /14° | 1.5 mm | 7 | |
| Sept. 18 | Mist | 26° /14° | 0 mm | 6 | |
| Sept. 19 | Sunny | 28° /14° | 0 mm | 7 | |
| Sept. 20 | Partly cloudy | 31° /17° | 0 mm | 8 | |
| Sept. 21 | Cloudy | 32° /20° | 0 mm | 7 | |
| Sept. 22 | Partly cloudy | 31° /19° | 3.2 mm | 8 | |
| Sept. 23 | Sunny | 26° /18° | 3.7 mm | 6 | |
| Sept. 24 | Overcast | 26° /15° | 17.2 mm | 6 | |
| Sept. 25 | Patchy rain possible | 25° /17° | 0 mm | 6 | |
| Sept. 26 | Patchy rain possible | 27° /16° | 0.4 mm | 6 | |
| Sept. 27 | Patchy light rain with thunder | 25° /17° | 41.2 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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Important Notice
Our weather forecast for Jefferson County 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 Jefferson County forecast closer to your planned date for the most up-to-date weather information.
Jefferson County in September - FAQ
What are the expected maximum and minimum temperatures in Jefferson County 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 Jefferson County during September?
Significant rainfall exceeding 170.8 mm is expected in Jefferson County during September, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Jefferson County during September?
The average wind speed in Jefferson County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Jefferson County
Explore the daily rainfall trends and prepare for Jefferson Countys September weather 💧
UV exposure in Jefferson County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Jefferson County?Get accurate weather forecasts for Jefferson County, located at latitude 38.254 and longitude -85.759. Stay updated with localized weather information tailored for Jefferson County.
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