Weather in Cheyenne, Wyoming for September 2025
Until now, September 2025 in Cheyenne is slightly cooler than the historical average by -1.5 °F.
Expect cooler weather in the next days in Cheyenne with the forecast suggesting a temperature of 23.6 °F, lower than the historical average.
In general, the average temperature in Cheyenne at the beginning of September is 25.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 23.9 °F by the end of September.
Cheyenne experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 148.9 mm.
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Cheyenne Weather September
Temperatures trend during September in Cheyenne
September weather in Cheyenne day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 27° /12° | 0 mm | 7 | |
| Sept. 2 |  Patchy rain possible | 28° /11° | 0.2 mm | 7 | |
| Sept. 3 |  Patchy light drizzle | 27° /15° | 0.4 mm | 7 | |
| Sept. 4 | Light rain shower | 27° /12° | 2 mm | 7 | |
| Sept. 5 |  Partly cloudy | 18° /10° | 0 mm | 5 | |
| Sept. 6 | Sunny | 24° /9° | 0 mm | 7 | |
| Sept. 7 | Partly cloudy | 26° /11° | 5.3 mm | 6 | |
| Sept. 8 | Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 9 | Patchy rain possible | 28° /14° | 0.5 mm | 6 | |
| Sept. 10 | Partly cloudy | 28° /14° | 0 mm | 7 | |
| Sept. 11 | Light rain shower | 26° /14° | 2.1 mm | 6 | |
| Sept. 12 | Partly cloudy | 27° /12° | 0 mm | 7 | |
| Sept. 13 |  Overcast | 24° /10° | 1.8 mm | 5 | |
| Sept. 14 | Sunny | 24° /10° | 0 mm | 6 | |
| Sept. 15 | Patchy rain possible | 27° /11° | 0.4 mm | 7 | |
| Sept. 16 | Partly cloudy | 23° /11° | 0.7 mm | 6 | |
| Sept. 17 | Patchy rain possible | 21° /8° | 1.3 mm | 1.4 | |
| Sept. 18 | Partly cloudy | 17° /8° | 0 mm | 1.1 | |
| Sept. 19 | Sunny | 25° /6° | 0 mm | 1.7 | |
| Sept. 20 | Patchy rain possible | 26° /13° | 0.2 mm | 1.5 | |
| Sept. 21 | Sunny | 25° /15° | 0 mm | 0 | |
| Sept. 22 | Sunny | 23° /13° | 0 mm | 5 | |
| Sept. 23 | Sunny | 27° /11° | 0 mm | 5 | |
| Sept. 24 | Sunny | 30° /15° | 0 mm | 6 | |
| Sept. 25 | Sunny | 27° /17° | 0 mm | 6 | |
| Sept. 26 | Sunny | 28° /14° | 0 mm | 6 | |
| Sept. 27 | Sunny | 27° /15° | 0.1 mm | 6 | |
| Sept. 28 | Patchy rain possible | 12° /11° | 2.4 mm | 3 | |
| Sept. 29 | Patchy rain possible | 20° /11° | 0.2 mm | 3 | |
| Sept. 30 | Sunny | 23° /12° | 0 mm | 5 | |
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Cheyenne in September - FAQ
September rainfall patterns in Cheyenne
UV exposure in Cheyenne during September
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Where is Cheyenne?Get accurate weather forecasts for Cheyenne, located at latitude 41.14 and longitude -104.82. Stay updated with localized weather information tailored for Cheyenne.