Casper weather in August 2025

Expect 29°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Casper in August. Check more long-term weather averages for Casper in August before you book your next holiday to Wyoming in 2025/2026.

  • 29°C maximum daytime temperature in August in Casper29
    29°C max day temperature
  • 10 hours of sunshine per day
  • 6 days with some rainfall in August in Casper6
    6 days with some rainfall
  • 10°C minimum night-time temperature in August in Casper10
    10°C 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
  • 19 mm monthly rainfall in August in Casper19
    19 mm 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Casper in August?

Daytime temperatures usually reach 29°C in Casper in August with moderate heat and humidity, falling to 10°C 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 73% of daylight hours.

Does it rain in Casper in August?

There are usually 6 days with some rain in Casper in August and the average monthly rainfall is 19mm.

Casper August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:57 19:26
Saturday, 16th August 2025 05:13 19:05
Sunday, 31st August 2025 05:29 18:41

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