Bellingham weather in May 2025

Expect daytime maximum temperatures of 61°F in Bellingham, Washington State in May based on long-term weather averages. There are 7 hours of sunshine per day on average with 13 days with some rainfall and typically 2.7 inches of rainfall in the month.

  • 61°F maximum daytime temperature in May in Bellingham61
    61°F max day temperature
  • 7 hours of sunshine per day
  • 13 days with some rainfall in May in Bellingham13
    13 days with some rainfall
  • 45°F minimum night-time temperature in May in Bellingham45
    45°F min night temperature
  • 15 hours of daylight per day in May in Bellingham15
    15 hours of daylight per day
  • No heat & humidity in May in Bellingham0
    No heat & humidity
  • 2.7 inches monthly rainfall in May in Bellingham2.7
    2.7 inches of monthly rainfall
  • UV (maximum) index 6 (High) in May in Bellingham6
    6 (High) UV index
  • 50°F sea temperature in May in Bellingham50
    50°F sea temperature

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The May weather guide for Washington State (Bellingham) 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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More about the USA

How warm is it in Bellingham in May?

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

How sunny is it in Bellingham in May?

There are normally 7 hours of bright sunshine each day in Bellingham in May - that's 45% of daylight hours.

How warm is the sea around Bellingham in May?

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

Does it rain in Bellingham in May?

There are usually 13 days with some rain in Bellingham in May and the average monthly rainfall is 2.7 inches.

Bellingham May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:49 19:26
Friday, 16th May 2025 04:27 19:47
Saturday, 31st May 2025 04:12 20:04

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