Friday Harbor weather in May 2025

Expect 61°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Friday Harbor in May. Check more long-term weather averages for Friday Harbor in May before you book your next holiday to Washington State in 2025/2026.

  • 61°F maximum daytime temperature in May in Friday Harbor61
    61°F max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in May in Friday Harbor11
    11 days with some rainfall
  • 45°F minimum night-time temperature in May in Friday Harbor45
    45°F min night temperature
  • 15 hours of daylight per day in May in Friday Harbor15
    15 hours of daylight per day
  • No heat & humidity in May in Friday Harbor0
    No heat & humidity
  • 1.3 inches monthly rainfall in May in Friday Harbor1.3
    1.3 inches of monthly rainfall
  • UV (maximum) index 6 (High) in May in Friday Harbor6
    6 (High) UV index
  • 50°F sea temperature in May in Friday Harbor50
    50°F sea temperature

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The May weather guide for Washington State (Friday Harbor) 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 warm is it in Friday Harbor in May?

Daytime temperatures usually reach 61°F in Friday Harbor in May, falling to 45°F at night.

How sunny is it in Friday Harbor in May?

There are normally 8 hours of bright sunshine each day in Friday Harbor in May - that's 52% of daylight hours.

How warm is the sea around Friday Harbor in May?

The average sea temperature around Friday Harbor in May is 50°F.

Does it rain in Friday Harbor in May?

There are usually 11 days with some rain in Friday Harbor in May and the average monthly rainfall is 1.3 inches.

Friday Harbor May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:52 19:27
Friday, 16th May 2025 04:30 19:48
Saturday, 31st May 2025 04:15 20:05

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