Weather in Washoe County, Nevada for September 2025
Until now, September 2025 in Washoe County is slightly cooler than the historical average by -1.7 °F.
Expect cooler weather in the next days in Washoe County with the forecast suggesting a temperature of 25 °F, lower than the historical average.
In general, the average temperature in Washoe County at the beginning of September is 28 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.9 °F by the end of September.
Washoe County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 15.8 mm.
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Washoe County Weather September
Temperatures trend during September in Washoe County
September weather in Washoe County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 28° /13° | 0 mm | 7 | |
| Sept. 2 |  Cloudy | 27° /14° | 0 mm | 6 | |
| Sept. 3 |  Sunny | 26° /11° | 2.3 mm | 6 | |
| Sept. 4 | Partly cloudy | 28° /12° | 0 mm | 7 | |
| Sept. 5 | Sunny | 30° /14° | 0.2 mm | 7 | |
| Sept. 6 | Sunny | 29° /13° | 0.6 mm | 7 | |
| Sept. 7 |  Overcast | 28° /12° | 0 mm | 6 | |
| Sept. 8 | Sunny | 28° /11° | 0 mm | 7 | |
| Sept. 9 | Sunny | 26° /9° | 0 mm | 6 | |
| Sept. 10 | Sunny | 25° /10° | 1.9 mm | 6 | |
| Sept. 11 | Sunny | 25° /9° | 0 mm | 6 | |
| Sept. 12 | Sunny | 24° /8° | 0 mm | 6 | |
| Sept. 13 | Partly cloudy | 26° /10° | 0 mm | 7 | |
| Sept. 14 | Sunny | 27° /10° | 0 mm | 7 | |
| Sept. 15 | Sunny | 26° /10° | 0.1 mm | 7 | |
| Sept. 16 | Sunny | 30° /12° | 0 mm | 1.8 | |
| Sept. 17 | Sunny | 31° /14° | 0 mm | 1.8 | |
| Sept. 18 | Sunny | 30° /17° | 0 mm | 1.5 | |
| Sept. 19 |  Patchy rain possible | 18° /14° | 2.7 mm | 1.1 | |
| Sept. 20 | Sunny | 26° /11° | 0 mm | 0 | |
| Sept. 21 | Sunny | 26° /10° | 0 mm | 5 | |
| Sept. 22 | Sunny | 28° /13° | 0 mm | 6 | |
| Sept. 23 | Sunny | 28° /15° | 0 mm | 6 | |
| Sept. 24 | Sunny | 28° /13° | 0 mm | 5 | |
| Sept. 25 | Sunny | 28° /12° | 0 mm | 5 | |
| Sept. 26 | Patchy rain possible | 22° /9° | 0.1 mm | 4 | |
| Sept. 27 | Partly cloudy | 14° /6° | 0 mm | 3 | |
| Sept. 28 | Sunny | 18° /6° | 0 mm | 4 | |
| Sept. 29 | Sunny | 23° /7° | 0 mm | 4 | |
| Sept. 30 |  Patchy light rain with thunder | 20° /7° | 6.6 mm | 5 | |
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Washoe County in September - FAQ
September rainfall patterns in Washoe County
UV exposure in Washoe County during September
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Where is Washoe County?Get accurate weather forecasts for Washoe County, located at latitude 39.53 and longitude -119.814. Stay updated with localized weather information tailored for Washoe County.