Weather in Brown County, Wisconsin for September 2026
Until now, September 2026 in Brown County has been nearly identical to the historical average, with a temperature of 23 °F (showing only a slight deviation of 0.4 °F).
The forecast for the next days in Brown County predicts a temperature of 17.7 °F, which is cooler than the historical average.
In general, the average temperature in Brown County at the beginning of September is 22.4 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 19.9 °F by the end of September.
Brown County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 45.9 mm.
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Brown County Weather September
Temperatures trend during September in Brown County
September weather in Brown County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 27° /15° | 0 mm | 6 | |
| Sept. 2 |  Sunny | 24° /13° | 158.2 mm | 4 | |
| Sept. 3 | Sunny | 23° /13° | 13.7 mm | 5 | |
| Sept. 4 | Sunny | 22° /11° | 18.2 mm | 3 | |
| Sept. 5 |  Patchy rain possible | 22° /13° | 5.5 mm | 3 | |
| Sept. 6 | Patchy rain possible | 19° /9° | 0.1 mm | 5 | |
| Sept. 7 |  Overcast | 20° /7° | 0 mm | 4 | |
| Sept. 8 | Partly cloudy | 23° /8° | 11.4 mm | 4 | |
| Sept. 9 | Overcast | 27° /14° | 0 mm | 6 | |
| Sept. 10 |  Cloudy | 25° /13° | 0 mm | 6 | |
| Sept. 11 | Patchy rain possible | 26° /14° | 0 mm | 6 | |
| Sept. 12 | Sunny | 26° /14° | 0.2 mm | 5 | |
| Sept. 13 | Cloudy | 23° /14° | 4.1 mm | 5 | |
| Sept. 14 | Overcast | 26° /12° | 1.7 mm | 6 | |
| Sept. 15 | Patchy rain possible | 27° /15° | 5.1 mm | 4 | |
| Sept. 16 | Sunny | 26° /12° | 0 mm | 5 | |
| Sept. 17 | Partly cloudy | 25° /13° | 0.2 mm | 5 | |
| Sept. 18 |  Fog | 23° /13° | 5.4 mm | 4 | |
| Sept. 19 | Mist | 20° /11° | 0.9 mm | 4 | |
| Sept. 20 | Light rain shower | 20° /13° | 7 mm | 4 | |
| Sept. 21 | Sunny | 22° /12° | 0 mm | 4 | |
| Sept. 22 | Mist | 19° /13° | 1.3 mm | 4 | |
| Sept. 23 | Sunny | 20° /10° | 0 mm | 5 | |
| Sept. 24 | Sunny | 19° /11° | 0 mm | 4.8 | |
| Sept. 25 | Overcast | 21° /13° | 0.1 mm | 2.8 | |
| Sept. 26 | Sunny | 21° /10° | 0 mm | 4.8 | |
| Sept. 27 | Overcast | 20° /10° | 0 mm | 4.7 | |
| Sept. 28 | Sunny | 21° /11° | 0 mm | 6 | |
| Sept. 29 | Sunny | 22° /13° | 2.1 mm | 6 | |
| Sept. 30 |  Moderate rain | 15° /10° | 39.3 mm | 3 | |
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Brown County in September - FAQ
What are the expected maximum and minimum temperatures in Brown County during September?
How much rainfall should be expected in Brown County during September?
What are the typical wind conditions in Brown County during September?
September rainfall patterns in Brown County
UV exposure in Brown County during September
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Where is Brown County?Get accurate weather forecasts for Brown County, located at latitude 44.519 and longitude -88.02. Stay updated with localized weather information tailored for Brown County.