Grand Portage weather in May 2025

Expect 64°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Grand Portage in May. Check more long-term weather averages for Grand Portage in May before you book your next holiday to Minnesota in 2025/2026.

  • 64°F maximum daytime temperature in May in Grand Portage64
    64°F max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in May in Grand Portage11
    11 days with some rainfall
  • 36°F minimum night-time temperature in May in Grand Portage36
    36°F min night temperature
  • 15 hours of daylight per day in May in Grand Portage15
    15 hours of daylight per day
  • No heat & humidity in May in Grand Portage0
    No heat & humidity
  • 2.9 inches monthly rainfall in May in Grand Portage2.9
    2.9 inches of monthly rainfall
  • UV (maximum) index 6 (High) in May in Grand Portage6
    6 (High) UV index
  • 37°F sea temperature in May in Grand Portage37
    37°F sea temperature

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The May weather guide for Minnesota (Grand Portage) 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 Grand Portage in May?

Daytime temperatures usually reach 64°F in Grand Portage in May, falling to 36°F at night.

How sunny is it in Grand Portage in May?

There are normally 8 hours of bright sunshine each day in Grand Portage in May - that's 55% of daylight hours.

How warm is the sea around Grand Portage in May?

The average sea temperature around Grand Portage in May is 37°F.

Does it rain in Grand Portage in May?

There are usually 11 days with some rain in Grand Portage in May and the average monthly rainfall is 2.9 inches.

Grand Portage May sunrise & sunset times

Browse the sunrise and sunset times for Grand Portage in May 2025. Select a month to view Grand Portage sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:40 19:12
Friday, 16th May 2025 04:18 19:33
Saturday, 31st May 2025 04:04 19:50

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