Jefferson County (Birmingham)
September
Weather in Jefferson County, Alabama for September 2026
Your guide to Jefferson County weather in September - trends and predictions
So far, September 2026 in Jefferson County shows a warmer trend than usual by 3.7 °F.
The forecast for the next days in Jefferson County predicts temperatures to be around 29 °F, close to the historical average.
In general, the average temperature in Jefferson County at the beginning of September is 32 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 27.7 °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 190.6 mm of precipitation.
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Temperatures
Rain 🌧️
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16
Dry days
14
Rainy days
0
Snow days
29°/20°
Temperatures
12 km/h
Avg max wind
65 %
Avg humidity
Jefferson County Weather September
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Temperatures trend during September in Jefferson County
See the weather trend as well as the moving average line
September weather in Jefferson County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate or heavy rain shower | 32° /21° | 2.3 mm | 8 | |
| Sept. 2 |  Overcast | 32° /21° | 0.1 mm | 8 | |
| Sept. 3 |  Cloudy | 32° /21° | 0 mm | 8 | |
| Sept. 4 |  Partly cloudy | 34° /22° | 0 mm | 9 | |
| Sept. 5 | Overcast | 32° /22° | 17.9 mm | 7 | |
| Sept. 6 |  Mist | 31° /21° | 7.8 mm | 7 | |
| Sept. 7 | Overcast | 31° /19° | 0.3 mm | 7 | |
| Sept. 8 |  Sunny | 31° /17° | 0 mm | 8 | |
| Sept. 9 | Overcast | 31° /19° | 1 mm | 8 | |
| Sept. 10 | Partly cloudy | 33° /19° | 0 mm | 8 | |
| Sept. 11 | Fog | 31° /19° | 3.2 mm | 7 | |
| Sept. 12 | Moderate or heavy rain shower | 29° /20° | 12.9 mm | 5 | |
| Sept. 13 | Moderate or heavy rain shower | 30° /20° | 4.3 mm | 7 | |
| Sept. 14 | Partly cloudy | 30° /20° | 2.4 mm | 7 | |
| Sept. 15 | Overcast | 29° /21° | 1.7 mm | 7 | |
| Sept. 16 |  Patchy light drizzle | 31° /20° | 0.5 mm | 8 | |
| Sept. 17 | Partly cloudy | 31° /20° | 2.3 mm | 8 | |
| Sept. 18 | Sunny | 31° /19° | 2.5 mm | 8 | |
| Sept. 19 | Overcast | 33° /19° | 0.9 mm | 7 | |
| Sept. 20 | Cloudy | 33° /20° | 1.3 mm | 7 | |
| Sept. 21 | Overcast | 32° /21° | 1.5 mm | 7 | |
| Sept. 22 |  Light rain shower | 32° /22° | 7.1 mm | 7.8 | |
| Sept. 23 | Sunny | 32° /22° | 1.7 mm | 7.8 | |
| Sept. 24 | Overcast | 25° /18° | 0.2 mm | 3.7 | |
| Sept. 25 | Sunny | 27° /15° | 0 mm | 7.8 | |
| Sept. 26 | Overcast | 27° /19° | 0 mm | 6 | |
| Sept. 27 | Overcast | 28° /19° | 0 mm | 7 | |
| Sept. 28 | Sunny | 29° /20° | 0 mm | 7 | |
| Sept. 29 | Sunny | 30° /19° | 0 mm | 7 | |
| Sept. 30 | Overcast | 28° /21° | 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.
Change Month
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 20°, suitable for diverse activities and preferences.
How much rainfall should be expected in Jefferson County during September?
Significant rainfall exceeding 190.6 mm is expected in Jefferson County during September, occurring over more than 14 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 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 💧
Typically, Jefferson County has 14 rainy days in September with a total of 190.6 mm of rainfall.
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 33.521 and longitude -86.802. Stay updated with localized weather information tailored for Jefferson County.
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