Thunder Bay weather in May 2019

  • 15°C maximum daytime temperature in May in Thunder Bay15
    15°C max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in May in Thunder Bay11
    11 days with some rainfall
  • 2°C minimum night-time temperature in May in Thunder Bay2
    2°C min night temperature
  • 15 hours of daylight per day in May in Thunder Bay15
    15 hours of daylight per day
  • No heat & humidity in May in Thunder Bay0
    No heat & humidity
  • 70 mm monthly rainfall in May in Thunder Bay70
    70 mm of monthly rainfall
  • UV (maximum) index 6 (High) in May in Thunder Bay6
    6 (High) UV index
  • 3°C sea temperature in May in Thunder Bay3
    3°C sea temperature

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

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Expect 15°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Thunder Bay in May. Check more long-term weather averages for Thunder Bay in May before you book your next holiday to Ontario in 2019/2020.

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More about Thunder Bay

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The May 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 May

The average maximum daytime temperature in Thunder Bay in May is a comfortable 15°C (59°F). The average night-time temperature is usually a cold 2°C (36°F). There are usually 8 hours of bright sunshine each day, which represents 55% of the 15 hours of daylight.

Expect 70mm (2.8 inches) of rainfall across the whole of May with 11 days with some rain falling. Maximum UV levels will be high (6 UV index) at midday when the skies are clear.

The average sea temperature in and around Thunder Bay in May is 3°C (37°F).

Thunder Bay sunrise & sunset times for May 2019

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st May 2019 06:38 21:11
Thursday, 2nd May 2019 06:36 21:13
Friday, 3rd May 2019 06:35 21:14
Saturday, 4th May 2019 06:33 21:15
Sunday, 5th May 2019 06:31 21:17
Monday, 6th May 2019 06:30 21:18
Tuesday, 7th May 2019 06:28 21:20
Wednesday, 8th May 2019 06:27 21:21
Thursday, 9th May 2019 06:25 21:22
Friday, 10th May 2019 06:24 21:24
Saturday, 11th May 2019 06:22 21:25
Sunday, 12th May 2019 06:21 21:27
Monday, 13th May 2019 06:20 21:28
Tuesday, 14th May 2019 06:18 21:29
Wednesday, 15th May 2019 06:17 21:31
Thursday, 16th May 2019 06:16 21:32
Friday, 17th May 2019 06:14 21:33
Saturday, 18th May 2019 06:13 21:34
Sunday, 19th May 2019 06:12 21:36
Monday, 20th May 2019 06:11 21:37
Tuesday, 21st May 2019 06:10 21:38
Wednesday, 22nd May 2019 06:09 21:39
Thursday, 23rd May 2019 06:08 21:41
Friday, 24th May 2019 06:07 21:42
Saturday, 25th May 2019 06:06 21:43
Sunday, 26th May 2019 06:05 21:44
Monday, 27th May 2019 06:04 21:45
Tuesday, 28th May 2019 06:03 21:46
Wednesday, 29th May 2019 06:02 21:47
Thursday, 30th May 2019 06:01 21:48
Friday, 31st May 2019 06:01 21:49
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Below are average maximum temperatures at popular destinations in Ontario in May. Select a destination to see more weather parameters.

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