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Wyoming weather in September 2025
Expect 22°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Wyoming in September. Check more long-term weather averages for Wyoming in September before you book your next holiday to Wyoming in 2025/2026.
- 2222°C max day temperature
- 9 hours of sunshine per day
- 77 days with some rainfall
- 66°C min night temperature
- 1212 hours of daylight per day
- 0No heat & humidity
- 3434 mm of monthly rainfall
- 77 (High) UV index
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The September weather guide for Wyoming (Cheyenne) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Wyoming destinations
Below are average maximum temperatures at popular countries, regions and places in Wyoming in September. Select a holiday destination to see more weather parameters.
All Wyoming destinations
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Wyoming in September?
Daytime temperatures usually reach 22°C in Cheyenne, Wyoming in September, falling to 6°C at night.
How sunny is it in Wyoming in September?
There are normally 9 hours of bright sunshine each day in Cheyenne, Wyoming in September - that's 70% of daylight hours.
Does it rain in Wyoming in September?
There are usually 7 days with some rain in Cheyenne, Wyoming in September and the average monthly rainfall is 34mm.
Wyoming September sunrise & sunset times
Browse the sunrise and sunset times for Wyoming in September 2025. Select a month to view Wyoming sunrise and sunset times for the next 12 months. The Wyoming sunrise and sunset times shown below are for Cheyenne.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:26 | 18:31 |
Monday, 15th September 2025 | 05:40 | 18:08 |
Tuesday, 30th September 2025 | 05:55 | 17:42 |
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