Riverton weather in August 2026

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 27°C in Riverton in August with low heat and humidity, falling to 11°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 70% of daylight hours.

Does it rain in Riverton in August?

There are usually 10 days with some rain in Riverton in August and the average monthly rainfall is 40mm.

Riverton August sunrise & sunset times

Browse the sunrise and sunset times for Riverton in August 2026. Select a month to view Riverton sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st August 2026 05:05 19:35
Sunday, 16th August 2026 05:21 19:14
Monday, 31st August 2026 05:37 18:50

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