Thunder Bay weather in December 2019

  • -6°C maximum daytime temperature in December in Thunder Bay-6
    -6°C max day temperature
  • 3 hours of sunshine per day
  • 11 days with some rainfall in December in Thunder Bay11
    11 days with some rainfall
  • -16°C minimum night-time temperature in December in Thunder Bay-16
    -16°C 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
  • 45 mm monthly rainfall in December in Thunder Bay45
    45 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Thunder Bay1
    1 (Low) UV index
  • 4°C sea temperature in December in Thunder Bay4
    4°C sea temperature

Going to Thunder Bay? Find the best month to visit Thunder Bay based on the weather.

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Expect -6°C 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 2019/2020.

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More about Thunder Bay

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The December weather guide for Thunder Bay, Ontario 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 / mm)  |  Imperial (°F / inches)

Guide to Thunder Bay weather in December

The average maximum daytime temperature in Thunder Bay in December is a very cold -6°C (21°F). The average night-time temperature is usually a very cold -16°C (3°F). There are usually 3 hours of bright sunshine each day, which represents 35% of the 8 hours of daylight.

Expect 45mm (1.8 inches) of rainfall across the whole of December with 11 days with some rain falling. Maximum UV levels will be low (1 UV index) at midday when the skies are clear.

The average sea temperature in and around Thunder Bay in December is 4°C (39°F).

Thunder Bay sunrise & sunset times for December 2019

Browse the sunrise & sunset times for Thunder Bay in December 2019. Select a month to view Thunder Bay sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st December 2019 08:27 17:04
Monday, 2nd December 2019 08:28 17:04
Tuesday, 3rd December 2019 08:30 17:04
Wednesday, 4th December 2019 08:31 17:03
Thursday, 5th December 2019 08:32 17:03
Friday, 6th December 2019 08:33 17:03
Saturday, 7th December 2019 08:34 17:02
Sunday, 8th December 2019 08:35 17:02
Monday, 9th December 2019 08:36 17:02
Tuesday, 10th December 2019 08:37 17:02
Wednesday, 11th December 2019 08:38 17:02
Thursday, 12th December 2019 08:39 17:02
Friday, 13th December 2019 08:40 17:02
Saturday, 14th December 2019 08:41 17:02
Sunday, 15th December 2019 08:42 17:02
Monday, 16th December 2019 08:43 17:02
Tuesday, 17th December 2019 08:43 17:03
Wednesday, 18th December 2019 08:44 17:03
Thursday, 19th December 2019 08:45 17:03
Friday, 20th December 2019 08:45 17:04
Saturday, 21st December 2019 08:46 17:04
Sunday, 22nd December 2019 08:46 17:05
Monday, 23rd December 2019 08:47 17:05
Tuesday, 24th December 2019 08:47 17:06
Wednesday, 25th December 2019 08:48 17:07
Thursday, 26th December 2019 08:48 17:07
Friday, 27th December 2019 08:48 17:08
Saturday, 28th December 2019 08:48 17:09
Sunday, 29th December 2019 08:48 17:10
Monday, 30th December 2019 08:49 17:11
Tuesday, 31st December 2019 08:49 17:11
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Popular Ontario destinations

Below are average maximum temperatures at popular destinations in Ontario in December. Select a destination to see more weather parameters.

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