Williston weather in May 2026

Expect daytime maximum temperatures of 20°C in Williston, 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 49 mm of rainfall in the month.

  • 20°C maximum daytime temperature in May in Williston20
    20°C max day temperature
  • 10 hours of sunshine per day
  • 10 days with some rainfall in May in Williston10
    10 days with some rainfall
  • 6°C minimum night-time temperature in May in Williston6
    6°C min night temperature
  • 15 hours of daylight per day in May in Williston15
    15 hours of daylight per day
  • No heat & humidity in May in Williston0
    No heat & humidity
  • 49 mm monthly rainfall in May in Williston49
    49 mm of monthly rainfall
  • UV (maximum) index 6 (High) in May in Williston6
    6 (High) UV index

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The May weather guide for North Dakota (Williston) 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 Williston in May?

Daytime temperatures usually reach 20°C in Williston in May, falling to 6°C at night.

How sunny is it in Williston in May?

There are normally 10 hours of bright sunshine each day in Williston in May - that's 62% of daylight hours.

Does it rain in Williston in May?

There are usually 10 days with some rain in Williston in May and the average monthly rainfall is 49mm.

Williston May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:36 20:08
Saturday, 16th May 2026 05:14 20:29
Sunday, 31st May 2026 04:59 20:46

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