Riverton weather in August 2025

Expect daytime maximum temperatures of 30°C in Riverton, Wyoming in August based on long-term weather averages. There are 10 hours of sunshine per day on average.

  • 30°C maximum daytime temperature in August in Riverton30
    30°C max day temperature
  • 10 hours of sunshine per day
  • 5 days with some rainfall in August in Riverton5
    5 days with some rainfall
  • 10°C minimum night-time temperature in August in Riverton10
    10°C min night temperature
  • 14 hours of daylight per day in August in Riverton14
    14 hours of daylight per day
  • Moderate heat & humidity in August in RivertonM
    Moderate heat & humidity
  • 12 mm monthly rainfall in August in Riverton12
    12 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in August in Riverton9
    9 (Very High) UV index

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The August 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Riverton in August?

Daytime temperatures usually reach 30°C in Riverton in August with moderate heat and humidity, falling to 10°C at night.

How sunny is it in Riverton in August?

There are normally 10 hours of bright sunshine each day in Riverton in August - that's 75% of daylight hours.

Does it rain in Riverton in August?

There are usually 5 days with some rain in Riverton in August and the average monthly rainfall is 12mm.

Riverton August sunrise & sunset times

Browse the sunrise and sunset times for Riverton in August 2025. Select a month to view Riverton sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:05 19:34
Saturday, 16th August 2025 05:21 19:14
Sunday, 31st August 2025 05:37 18:49

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