Thunder Bay weather in March 2025

Expect 32°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Thunder Bay in March. Check more long-term weather averages for Thunder Bay in March before you book your next holiday to Ontario in 2025/2026.

  • 32°F maximum daytime temperature in March in Thunder Bay32
    32°F max day temperature
  • 5 hours of sunshine per day
  • 10 days with some rainfall in March in Thunder Bay10
    10 days with some rainfall
  • 10°F minimum night-time temperature in March in Thunder Bay10
    10°F min night temperature
  • 12 hours of daylight per day in March in Thunder Bay12
    12 hours of daylight per day
  • No heat & humidity in March in Thunder Bay0
    No heat & humidity
  • 1.7 inches monthly rainfall in March in Thunder Bay1.7
    1.7 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in March in Thunder Bay3
    3 (Moderate) UV index
  • 36°F sea temperature in March in Thunder Bay36
    36°F sea temperature

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The March weather guide for Ontario (Thunder Bay) 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 Canada

How cold is it in Thunder Bay in March?

Daytime temperatures usually reach 32°F in Thunder Bay in March, falling to 10°F at night.

How sunny is it in Thunder Bay in March?

There are normally 5 hours of bright sunshine each day in Thunder Bay in March - that's 44% of daylight hours.

How warm is the sea around Thunder Bay in March?

The average sea temperature around Thunder Bay in March is 36°F.

Does it rain in Thunder Bay in March?

There are usually 10 days with some rain in Thunder Bay in March and the average monthly rainfall is 1.7 inches. Rain may fall as snow in this month.

Thunder Bay March sunrise & sunset times

Browse the sunrise and sunset times for Thunder Bay in March 2025. Select a month to view Thunder Bay sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st March 2025 07:38 18:42
Sunday, 16th March 2025 07:07 19:04
Monday, 31st March 2025 06:36 19:27

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