Bismarck weather in August 2025

Expect 28°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Bismarck in August. Check more long-term weather averages for Bismarck in August before you book your next holiday to North Dakota in 2025/2026.

  • 28°C maximum daytime temperature in August in Bismarck28
    28°C max day temperature
  • 10 hours of sunshine per day
  • 8 days with some rainfall in August in Bismarck8
    8 days with some rainfall
  • 12°C minimum night-time temperature in August in Bismarck12
    12°C min night temperature
  • 14 hours of daylight per day in August in Bismarck14
    14 hours of daylight per day
  • Low heat & humidity in August in BismarckL
    Low heat & humidity
  • 44 mm monthly rainfall in August in Bismarck44
    44 mm of monthly rainfall
  • UV (maximum) index 7 (High) in August in Bismarck7
    7 (High) UV index

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The August weather guide for North Dakota (Bismarck) 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 Bismarck in August?

Daytime temperatures usually reach 28°C in Bismarck in August with low heat and humidity, falling to 12°C at night.

How sunny is it in Bismarck in August?

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

Does it rain in Bismarck in August?

There are usually 8 days with some rain in Bismarck in August and the average monthly rainfall is 44mm.

Bismarck August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:24 20:14
Saturday, 16th August 2025 05:43 19:51
Sunday, 31st August 2025 06:02 19:24

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