Weather in Jefferson County, Kentucky for September 2026
So far, September 2026 in Jefferson County is slightly warmer than the historical average by 2 °F.
An exceptional deviation from the historical average is forecasted for next days of September 2026 in Jefferson County with the forecasted temperature being 22.6 °F, much lower than usual.
In general, the average temperature in Jefferson County at the beginning of September is 31.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 26.4 °F by the end of September.
The climate of Jefferson County 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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Jefferson County Weather September
Temperatures trend during September in Jefferson County
September weather in Jefferson County day by day
| 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 | Overcast | 29° /18° | 2.3 mm | 6 | |
| Sept. 13 | Mist | 29° /16° | 2.9 mm | 7 | |
| Sept. 14 | Sunny | 29° /16° | 0.7 mm | 7 | |
| Sept. 15 | Sunny | 31° /17° | 0.1 mm | 7 | |
| Sept. 16 | Overcast | 31° /17° | 0.6 mm | 6 | |
| Sept. 17 |  Patchy light rain with thunder | 30° /18° | 0.9 mm | 7 | |
| Sept. 18 | Mist | 29° /17° | 0.9 mm | 6 | |
| Sept. 19 | Sunny | 31° /17° | 0.4 mm | 7 | |
| Sept. 20 | Partly cloudy | 32° /19° | 0 mm | 7 | |
| Sept. 21 |  Cloudy | 31° /20° | 0.3 mm | 6 | |
| Sept. 22 | Partly cloudy | 28° /18° | 7.4 mm | 7 | |
| Sept. 23 | Sunny | 26° /17° | 4.9 mm | 5 | |
| Sept. 24 | Overcast | 26° /17° | 30.6 mm | 5 | |
| Sept. 25 | Fog | 24° /16° | 0 mm | 6 | |
| Sept. 26 | Overcast | 25° /13° | 0.2 mm | 5 | |
| Sept. 27 | Patchy light rain with thunder | 25° /14° | 20.6 mm | 6 | |
| Sept. 28 | Patchy light rain with thunder | 26° /15° | 37.6 mm | 6 | |
| Sept. 29 | Sunny | 28° /15° | 0 mm | 6.2 | |
| Sept. 30 | Overcast | 31° /18° | 0 mm | 5.1 | |
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Jefferson County in September - FAQ
What are the expected maximum and minimum temperatures in Jefferson County during September?
How much rainfall should be expected in Jefferson County during September?
What are the typical wind conditions in Jefferson County during September?
September rainfall patterns in Jefferson County
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.