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 sees moderate rainfall in September, averaging 7 rainy days.
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23
Dry days
7
Rainy days
0
Snow days
29°/15°
Temperatures
12 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 29° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Jefferson County during September?
Moderate rainfall is anticipated in Jefferson County during September, with a total of 95.3 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Jefferson County during September?
The average wind speed in Jefferson County during September is 12 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
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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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