Custer weather in August 2025

Expect 82°F daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Custer in August. Check more long-term weather averages for Custer in August before you book your next holiday to South Dakota in 2025/2026.

  • 82°F maximum daytime temperature in August in Custer82
    82°F max day temperature
  • 10 hours of sunshine per day
  • 9 days with some rainfall in August in Custer9
    9 days with some rainfall
  • 52°F minimum night-time temperature in August in Custer52
    52°F min night temperature
  • 14 hours of daylight per day in August in Custer14
    14 hours of daylight per day
  • Low heat & humidity in August in CusterL
    Low heat & humidity
  • 1.7 inches monthly rainfall in August in Custer1.7
    1.7 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Custer8
    8 (Very High) UV index

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The August weather guide for South Dakota (Custer) 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 Custer in August?

Daytime temperatures usually reach 82°F in Custer in August with low heat and humidity, falling to 52°F at night.

How sunny is it in Custer in August?

There are normally 10 hours of bright sunshine each day in Custer in August - that's 72% of daylight hours.

Does it rain in Custer in August?

There are usually 9 days with some rain in Custer in August and the average monthly rainfall is 1.7 inches.

Custer August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:44 19:17
Saturday, 16th August 2025 05:00 18:56
Sunday, 31st August 2025 05:17 18:31

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