Bismarck weather in May 2026

Expect daytime maximum temperatures of 68°F in Bismarck, North Dakota in May based on long-term weather averages. There are 10 hours of sunshine per day on average with 10 days with some rainfall and typically 2.2 inches of rainfall in the month.

  • 68°F maximum daytime temperature in May in Bismarck68
    68°F max day temperature
  • 10 hours of sunshine per day
  • 10 days with some rainfall in May in Bismarck10
    10 days with some rainfall
  • 43°F minimum night-time temperature in May in Bismarck43
    43°F min night temperature
  • 15 hours of daylight per day in May in Bismarck15
    15 hours of daylight per day
  • No heat & humidity in May in Bismarck0
    No heat & humidity
  • 2.2 inches monthly rainfall in May in Bismarck2.2
    2.2 inches of monthly rainfall
  • UV (maximum) index 6 (High) in May in Bismarck6
    6 (High) UV index

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The May 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)  |  Imperial (°F)

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How hot is it in Bismarck in May?

Daytime temperatures usually reach 68°F in Bismarck in May, falling to 43°F at night.

How sunny is it in Bismarck in May?

There are normally 10 hours of bright sunshine each day in Bismarck in May - that's 63% of daylight hours.

Does it rain in Bismarck in May?

There are usually 10 days with some rain in Bismarck in May and the average monthly rainfall is 2.2 inches.

Bismarck May sunrise & sunset times

Browse the sunrise and sunset times for Bismarck in May 2026. Select a month to view Bismarck sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:28 19:54
Saturday, 16th May 2026 05:07 20:13
Sunday, 31st May 2026 04:53 20:29

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