Cheyenne
September
Weather in Cheyenne for September 2025
Your guide to Cheyenne weather in September - trends and predictions
In general, the average temperature in Cheyenne at the beginning of September is 26.7 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 26.3 °F by the end of September.
Cheyenne experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 148.9 mm.
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Temperatures
Rain 🌧️
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20
Dry days
10
Rainy days
0
Snow days
25°/11°
Temperatures
27 km/h
Avg max wind
38 %
Avg humidity
Cheyenne in September average weather
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  28° | 2  29° | 3  30° | 4 25° | 5  21° | 6 26° | |
| 7 28° | 8 28° | 9 29° | 10 28° | 11 26° | 12 28° | 13  24° |
| 14 27° | 15 27° | 16 27° | 17  23° | 18 22° | 19 24° | 20 27° |
| 21 15° | 22  8° | 23 22° | 24 22° | 25 27° | 26 30° | 27 27° |
| 28 28° | 29 29° | 30 21° |
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Temperatures trend during September in Cheyenne
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 28° /15° | 0 mm | 7 | |
| Sept. 2 | Patchy rain possible | 29° /13° | 0.4 mm | 6 | |
| Sept. 3 | Patchy light drizzle | 30° /18° | 0.8 mm | 7 | |
| Sept. 4 | Light rain shower | 25° /13° | 4.1 mm | 6 | |
| Sept. 5 | Partly cloudy | 21° /12° | 0 mm | 6 | |
| Sept. 6 | Sunny | 26° /14° | 0 mm | 7 | |
| Sept. 7 | Partly cloudy | 28° /14° | 0 mm | 7 | |
| Sept. 8 | Sunny | 28° /15° | 0 mm | 7 | |
| Sept. 9 | Patchy rain possible | 29° /17° | 1 mm | 6 | |
| Sept. 10 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 11 | Light rain shower | 26° /15° | 0.6 mm | 6 | |
| Sept. 12 | Partly cloudy | 28° /12° | 0 mm | 7 | |
| Sept. 13 | Overcast | 24° /11° | 0 mm | 5 | |
| Sept. 14 | Sunny | 27° /12° | 0 mm | 7 | |
| Sept. 15 | Patchy rain possible | 27° /13° | 0.8 mm | 6 | |
| Sept. 16 | Partly cloudy | 27° /14° | 1.4 mm | 7 | |
| Sept. 17 | Moderate or heavy rain shower | 23° /10° | 6 mm | 5 | |
| Sept. 18 | Overcast | 22° /6° | 0 mm | 5 | |
| Sept. 19 | Sunny | 24° /7° | 0 mm | 6 | |
| Sept. 20 | Sunny | 27° /8° | 0 mm | 7 | |
| Sept. 21 | Moderate or heavy rain shower | 15° /8° | 8.4 mm | 4 | |
| Sept. 22 | Heavy rain | 8° /1° | 125.4 mm | 2 | |
| Sept. 23 | Overcast | 22° /3° | 0 mm | 5 | |
| Sept. 24 | Partly cloudy | 22° /9° | 0 mm | 6 | |
| Sept. 25 | Sunny | 27° /8° | 0 mm | 7 | |
| Sept. 26 | Sunny | 30° /11° | 0 mm | 8 | |
| Sept. 27 | Partly cloudy | 27° /13° | 0 mm | 7 | |
| Sept. 28 | Sunny | 28° /12° | 0 mm | 7 | |
| Sept. 29 | Partly cloudy | 29° /10° | 0 mm | 7 | |
| Sept. 30 | Partly cloudy | 21° /6° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Cheyenne 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 Cheyenne forecast closer to your planned date for the most up-to-date weather information.
Cheyenne in September - FAQ
What are the expected maximum and minimum temperatures in Cheyenne during September?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cheyenne during September?
Significant rainfall exceeding 148.9 mm is expected in Cheyenne during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cheyenne during September?
The average wind speed in Cheyenne during September is 27 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Cheyenne
Explore the daily rainfall trends and prepare for Cheyennes September weather 💧
UV exposure in Cheyenne during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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