Rapid City weather in August 2024

Expect 84°F daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Rapid City in August. Check more long-term weather averages for Rapid City in August before you book your next holiday to South Dakota in 2024/2025.

  • 84°F maximum daytime temperature in August in Rapid City84
    84°F max day temperature
  • 10 hours of sunshine per day
  • 8 days with some rainfall in August in Rapid City8
    8 days with some rainfall
  • 55°F minimum night-time temperature in August in Rapid City55
    55°F min night temperature
  • 14 hours of daylight per day in August in Rapid City14
    14 hours of daylight per day
  • Moderate heat & humidity in August in Rapid CityM
    Moderate heat & humidity
  • 1.9 inches monthly rainfall in August in Rapid City1.9
    1.9 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Rapid City8
    8 (Very High) UV index

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The August weather guide for South Dakota (Rapid City) 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 Rapid City in August?

Daytime temperatures usually reach 84°F in Rapid City in August with moderate heat and humidity, falling to 55°F at night.

How sunny is it in Rapid City in August?

There are normally 10 hours of bright sunshine each day in Rapid City in August - that's 74% of daylight hours.

Does it rain in Rapid City in August?

There are usually 8 days with some rain in Rapid City in August and the average monthly rainfall is 1.9 inches.

Rapid City August sunrise & sunset times

Browse the sunrise and sunset times for Rapid City in August 2024. Select a month to view Rapid City sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st August 2024 05:42 20:16
Friday, 16th August 2024 05:59 19:55
Saturday, 31st August 2024 06:16 19:30

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