Jefferson County
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 30.6 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 27.6 °F by the end of September.
The climate of Jefferson County in September is notably wet, with an average of 12 rainy days.
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18
Dry days
12
Rainy days
0
Snow days
31°/19°
Temperatures
11 km/h
Avg max wind
60 %
Avg humidity
Jefferson County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  31° | 2  31° | 3  32° | 4  33° | 5 29° | 6  28° | 7  30° |
| 8  31° | 9 32° | 10 32° | 11 30° | 12  27° | 13 27° | 14 26° |
| 15 26° | 16  28° | 17 30° | 18 29° | 19 30° | 20 32° | 21 32° |
| 22 31° | 23 32° | 24 31° | 25  29° | 26 26° | 27 25° | 28 25° |
| 29 28° | 30 29° |
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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 | Moderate or heavy rain shower | 31° /20° | 4.6 mm | 7 | |
| Sept. 2 | Overcast | 31° /20° | 0.2 mm | 8 | |
| Sept. 3 | Cloudy | 32° /21° | 0 mm | 7 | |
| Sept. 4 | Partly cloudy | 33° /21° | 0 mm | 8 | |
| Sept. 5 | Overcast | 29° /20° | 1.3 mm | 6 | |
| Sept. 6 | Mist | 28° /19° | 12.5 mm | 7 | |
| Sept. 7 | Thundery outbreaks possible | 30° /18° | 0.5 mm | 7 | |
| Sept. 8 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 9 | Overcast | 32° /18° | 2 mm | 8 | |
| Sept. 10 | Mist | 32° /19° | 0 mm | 8 | |
| Sept. 11 | Fog | 30° /19° | 1.2 mm | 7 | |
| Sept. 12 | Light rain shower | 27° /19° | 22.1 mm | 6 | |
| Sept. 13 | Moderate or heavy rain shower | 27° /19° | 8.6 mm | 6 | |
| Sept. 14 | Cloudy | 26° /19° | 4.8 mm | 6 | |
| Sept. 15 | Overcast | 26° /19° | 3.5 mm | 6 | |
| Sept. 16 | Patchy light drizzle | 28° /20° | 0.9 mm | 7 | |
| Sept. 17 | Fog | 30° /19° | 1.9 mm | 8 | |
| Sept. 18 | Sunny | 29° /17° | 0 mm | 7 | |
| Sept. 19 | Overcast | 30° /17° | 0 mm | 7 | |
| Sept. 20 | Cloudy | 32° /19° | 0 mm | 8 | |
| Sept. 21 | Overcast | 32° /20° | 0 mm | 7 | |
| Sept. 22 | Overcast | 31° /20° | 0 mm | 7 | |
| Sept. 23 | Sunny | 32° /20° | 0 mm | 8 | |
| Sept. 24 | Partly cloudy | 31° /19° | 4 mm | 8 | |
| Sept. 25 | Moderate rain | 29° /20° | 31.6 mm | 7 | |
| Sept. 26 | Patchy light drizzle | 26° /18° | 34.5 mm | 6 | |
| Sept. 27 | Mist | 25° /18° | 100.6 mm | 6 | |
| Sept. 28 | Overcast | 25° /17° | 2.9 mm | 6 | |
| Sept. 29 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 30 | Partly cloudy | 29° /19° | 0 mm | 7 | |
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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?
Expect warm days with temperatures around 31°, cooling to mild conditions of 19° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Jefferson County during September?
In September, Jefferson County can expect light to moderate rainfall, totaling 42.9 mm across approximately 12 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Jefferson County during September?
The average wind speed in Jefferson County during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
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Where is Jefferson County?Get accurate weather forecasts for Jefferson County, located at latitude 33.521 and longitude -86.802. Stay updated with localized weather information tailored for Jefferson County.
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