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Green River weather in September 2025
Expect 21°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Green River in September. Check more long-term weather averages for Green River in September before you book your next holiday to Wyoming in 2025/2026.
- 2121°C max day temperature
- 9 hours of sunshine per day
- 77 days with some rainfall
- 22°C min night temperature
- 1212 hours of daylight per day
- 0No heat & humidity
- 2121 mm of monthly rainfall
- 77 (High) UV index
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Green River by month
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Recommended for Wyoming
The September weather guide for Wyoming (Green River) 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.
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Green River in September?
Daytime temperatures usually reach 21°C in Green River in September, falling to 2°C at night.
How sunny is it in Green River in September?
There are normally 9 hours of bright sunshine each day in Green River in September - that's 74% of daylight hours.
Does it rain in Green River in September?
There are usually 7 days with some rain in Green River in September and the average monthly rainfall is 21mm.
Green River September sunrise & sunset times
Browse the sunrise and sunset times for Green River in September 2025. Select a month to view Green River sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:44 | 18:50 |
Monday, 15th September 2025 | 05:59 | 18:26 |
Tuesday, 30th September 2025 | 06:14 | 18:01 |
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