Casper weather in August 2026

Expect daytime maximum temperatures of 84°F in Casper, Wyoming in August based on long-term weather averages. There are 10 hours of sunshine per day on average.

  • 84°F maximum daytime temperature in August in Casper84
    84°F max day temperature
  • 10 hours of sunshine per day
  • 6 days with some rainfall in August in Casper6
    6 days with some rainfall
  • 50°F minimum night-time temperature in August in Casper50
    50°F min night temperature
  • 14 hours of daylight per day in August in Casper14
    14 hours of daylight per day
  • Moderate heat & humidity in August in CasperM
    Moderate heat & humidity
  • 0.7 inches monthly rainfall in August in Casper0.7
    0.7 inches of monthly rainfall
  • UV (maximum) index 9 (Very High) in August in Casper9
    9 (Very High) UV index

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The August weather guide for Wyoming (Casper) 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)

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How hot is it in Casper in August?

Daytime temperatures usually reach 81°F in Casper in August with low heat and humidity, falling to 52°F at night.

How sunny is it in Casper in August?

There are normally 10 hours of bright sunshine each day in Casper in August - that's 70% of daylight hours.

Does it rain in Casper in August?

There are usually 10 days with some rain in Casper in August and the average monthly rainfall is 1.6 inches.

Casper August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st August 2026 04:57 19:26
Sunday, 16th August 2026 05:13 19:05
Monday, 31st August 2026 05:29 18:41

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