Wyoming
September
Weather in Wyoming for September 2025
Your guide to Wyoming weather in September - trends and predictions
In general, the average temperature in Wyoming at the beginning of September is 24.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.3 °F by the end of September.
With an average of 2 rainy days, Wyoming experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
28
Dry days
2
Rainy days
0
Snow days
26°/13°
Temperatures
19 km/h
Avg max wind
63 %
Avg humidity
Wyoming in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2  23° | 3 26° | 4 28° | 5 30° | 6 20° | 7  19° |
| 8 21° | 9 25° | 10 28° | 11 32° | 12 32° | 13 30° | 14 31° |
| 15 33° | 16 31° | 17 28° | 18  27° | 19 29° | 20 28° | 21  27° |
| 22  24° | 23 25° | 24 18° | 25 23° | 26 23° | 27  23° | 28 20° |
| 29 21° | 30 21° |
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Temperatures trend during September in Wyoming
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 | Patchy rain possible | 25° /13° | 0 mm | 6 | |
| Sept. 2 | Sunny | 23° /8° | 0 mm | 6 | |
| Sept. 3 | Sunny | 26° /10° | 0 mm | 7 | |
| Sept. 4 | Sunny | 28° /11° | 0 mm | 7 | |
| Sept. 5 | Sunny | 30° /13° | 0 mm | 8 | |
| Sept. 6 | Light rain shower | 20° /10° | 3.7 mm | 5 | |
| Sept. 7 | Partly cloudy | 19° /6° | 0 mm | 5 | |
| Sept. 8 | Sunny | 21° /6° | 0 mm | 6 | |
| Sept. 9 | Sunny | 25° /12° | 0 mm | 7 | |
| Sept. 10 | Sunny | 28° /12° | 0 mm | 7 | |
| Sept. 11 | Partly cloudy | 32° /16° | 0 mm | 8 | |
| Sept. 12 | Sunny | 32° /15° | 0 mm | 8 | |
| Sept. 13 | Sunny | 30° /17° | 0 mm | 8 | |
| Sept. 14 | Sunny | 31° /15° | 0 mm | 8 | |
| Sept. 15 | Partly cloudy | 33° /16° | 0 mm | 8 | |
| Sept. 16 | Sunny | 31° /15° | 0 mm | 8 | |
| Sept. 17 | Sunny | 28° /14° | 0 mm | 7 | |
| Sept. 18 | Overcast | 27° /15° | 0 mm | 6 | |
| Sept. 19 | Partly cloudy | 29° /16° | 0 mm | 7 | |
| Sept. 20 | Overcast | 28° /17° | 0 mm | 6 | |
| Sept. 21 | Mist | 27° /14° | 0 mm | 6 | |
| Sept. 22 | Moderate rain at times | 24° /17° | 5.5 mm | 5 | |
| Sept. 23 | Partly cloudy | 25° /13° | 0 mm | 7 | |
| Sept. 24 | Mist | 18° /13° | 0 mm | 4 | |
| Sept. 25 | Mist | 23° /14° | 0 mm | 5 | |
| Sept. 26 | Fog | 23° /11° | 0 mm | 5 | |
| Sept. 27 | Cloudy | 23° /12° | 0 mm | 5 | |
| Sept. 28 | Cloudy | 20° /15° | 0 mm | 5 | |
| Sept. 29 | Overcast | 21° /16° | 0 mm | 5 | |
| Sept. 30 | Mist | 21° /15° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Wyoming 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 Wyoming forecast closer to your planned date for the most up-to-date weather information.
Wyoming in September - FAQ
What are the expected maximum and minimum temperatures in Wyoming during September?
Enjoy moderate daytime temperatures of up to 26° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Wyoming during September?
Rainfall in Wyoming during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Wyoming during September?
The average wind speed in Wyoming during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Wyoming
Explore the daily rainfall trends and prepare for Wyomings September weather 💧
UV exposure in Wyoming during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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