Thunder Bay weather in December 2024

Expect 21°F daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Thunder Bay in December. Check more long-term weather averages for Thunder Bay in December before you book your next holiday to Ontario in 2024/2025.

  • 21°F maximum daytime temperature in December in Thunder Bay21
    21°F max day temperature
  • 3 hours of sunshine per day
  • 11 days with some rainfall in December in Thunder Bay11
    11 days with some rainfall
  • 3°F minimum night-time temperature in December in Thunder Bay3
    3°F min night temperature
  • 8 hours of daylight per day in December in Thunder Bay8
    8 hours of daylight per day
  • No heat & humidity in December in Thunder Bay0
    No heat & humidity
  • 1.8 inches monthly rainfall in December in Thunder Bay1.8
    1.8 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Thunder Bay1
    1 (Low) UV index
  • 39°F sea temperature in December in Thunder Bay39
    39°F sea temperature

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The December 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 December?

Daytime temperatures usually reach 21°F in Thunder Bay in December, falling to 3°F at night.

How sunny is it in Thunder Bay in December?

There are normally 3 hours of bright sunshine each day in Thunder Bay in December - that's 35% of daylight hours.

How warm is the sea around Thunder Bay in December?

The average sea temperature around Thunder Bay in December is 39°F.

Does it rain in Thunder Bay in December?

There are usually 11 days with some rain in Thunder Bay in December and the average monthly rainfall is 1.8 inches. Rain may fall as snow in this month.

Thunder Bay December sunrise & sunset times

Browse the sunrise and sunset times for Thunder Bay in December 2024. Select a month to view Thunder Bay sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st December 2024 08:28 17:04
Monday, 16th December 2024 08:43 17:03
Tuesday, 31st December 2024 08:49 17:12

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