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Riverton weather in September 2025
Expect 73°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Riverton in September. Check more long-term weather averages for Riverton in September before you book your next holiday to Wyoming in 2025/2026.
- 7373°F max day temperature
- 9 hours of sunshine per day
- 66 days with some rainfall
- 3939°F min night temperature
- 1212 hours of daylight per day
- 0No heat & humidity
- 0.80.8 inches of monthly rainfall
- 66 (High) UV index
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Recommended for Wyoming
The September weather guide for Wyoming (Riverton) 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) | Imperial (°F)
More about the USA
How hot is it in Riverton in September?
Daytime temperatures usually reach 73°F in Riverton in September, falling to 39°F at night.
How sunny is it in Riverton in September?
There are normally 9 hours of bright sunshine each day in Riverton in September - that's 71% of daylight hours.
Does it rain in Riverton in September?
There are usually 6 days with some rain in Riverton in September and the average monthly rainfall is 0.8 inches.
Riverton September sunrise & sunset times
Browse the sunrise and sunset times for Riverton in September 2025. Select a month to view Riverton sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:38 | 18:48 |
Monday, 15th September 2025 | 05:54 | 18:23 |
Tuesday, 30th September 2025 | 06:10 | 17:56 |
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