Custer weather in August 2025

Expect 28°C 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.

  • 28°C maximum daytime temperature in August in Custer28
    28°C max day temperature
  • 10 hours of sunshine per day
  • 9 days with some rainfall in August in Custer9
    9 days with some rainfall
  • 11°C minimum night-time temperature in August in Custer11
    11°C 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
  • 42 mm monthly rainfall in August in Custer42
    42 mm 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Custer in August?

Daytime temperatures usually reach 28°C in Custer in August with low heat and humidity, falling to 11°C 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 42mm.

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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