Weather in Columbia County, Wisconsin for September 2026
Until now, September 2026 in Columbia County has been nearly identical to the historical average, with a temperature of 23.5 °F (showing only a slight deviation of 0.2 °F).
The forecast for the next days in Columbia County predicts a temperature of 16.8 °F, which is cooler than the historical average.
In general, the average temperature in Columbia County at the beginning of September is 23.6 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 21 °F by the end of September.
Columbia County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 61 mm.
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Columbia County Weather September
Temperatures trend during September in Columbia County
September weather in Columbia County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 26° /13° | 0 mm | 5 | |
| Sept. 2 | Sunny | 27° /14° | 0.4 mm | 5 | |
| Sept. 3 |  Cloudy | 23° /13° | 30.5 mm | 4 | |
| Sept. 4 | Sunny | 25° /11° | 2.9 mm | 6 | |
| Sept. 5 |  Patchy rain possible | 22° /12° | 2.8 mm | 4 | |
| Sept. 6 |  Overcast | 20° /8° | 0 mm | 3 | |
| Sept. 7 | Sunny | 22° /6° | 0 mm | 4 | |
| Sept. 8 | Sunny | 23° /8° | 0.9 mm | 4 | |
| Sept. 9 | Sunny | 27° /13° | 0.4 mm | 5 | |
| Sept. 10 |  Partly cloudy | 25° /13° | 0 mm | 6 | |
| Sept. 11 | Partly cloudy | 26° /14° | 0 mm | 6 | |
| Sept. 12 | Sunny | 26° /14° | 0.1 mm | 5 | |
| Sept. 13 | Overcast | 25° /14° | 0.1 mm | 6 | |
| Sept. 14 | Partly cloudy | 25° /12° | 1.2 mm | 6 | |
| Sept. 15 | Patchy rain possible | 27° /15° | 2.3 mm | 4 | |
| Sept. 16 | Sunny | 27° /14° | 0 mm | 5 | |
| Sept. 17 | Partly cloudy | 25° /13° | 0.1 mm | 5 | |
| Sept. 18 |  Fog | 24° /13° | 6.7 mm | 5 | |
| Sept. 19 | Cloudy | 23° /14° | 22.5 mm | 4 | |
| Sept. 20 |  Moderate or heavy rain shower | 21° /15° | 21.3 mm | 4 | |
| Sept. 21 | Fog | 23° /12° | 0.4 mm | 4 | |
| Sept. 22 | Light rain shower | 19° /12° | 3.8 mm | 4 | |
| Sept. 23 | Sunny | 20° /9° | 2 mm | 5 | |
| Sept. 24 | Fog | 20° /10° | 0 mm | 4 | |
| Sept. 25 | Fog | 21° /11° | 1 mm | 4 | |
| Sept. 26 | Mist | 27° /11° | 0 mm | 7 | |
| Sept. 27 | Overcast | 20° /11° | 0 mm | 4.8 | |
| Sept. 28 | Sunny | 21° /14° | 0 mm | 4.8 | |
| Sept. 29 | Patchy rain possible | 21° /13° | 2.7 mm | 3.9 | |
| Sept. 30 | Fog | 17° /15° | 62.3 mm | 0.9 | |
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Columbia County in September - FAQ
What are the expected maximum and minimum temperatures in Columbia County during September?
How much rainfall should be expected in Columbia County during September?
What are the typical wind conditions in Columbia County during September?
September rainfall patterns in Columbia County
UV exposure in Columbia County during September
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Where is Columbia County?Get accurate weather forecasts for Columbia County, located at latitude 43.627 and longitude -89.771. Stay updated with localized weather information tailored for Columbia County.