Thunder Bay weather in August 2019

  • 22°C maximum daytime temperature in August in Thunder Bay22
    22°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in August in Thunder Bay13
    13 days with some rainfall
  • 10°C minimum night-time temperature in August in Thunder Bay10
    10°C min night temperature
  • 14 hours of daylight per day in August in Thunder Bay14
    14 hours of daylight per day
  • No heat & humidity in August in Thunder Bay0
    No heat & humidity
  • 88 mm monthly rainfall in August in Thunder Bay88
    88 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in Thunder Bay6
    6 (High) UV index
  • 13°C sea temperature in August in Thunder Bay13
    13°C sea temperature

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

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Expect 22°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Thunder Bay in August. Check more long-term weather averages for Thunder Bay in August before you book your next holiday to Ontario in 2019/2020.

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More about Thunder Bay

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The August 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 August

The average maximum daytime temperature in Thunder Bay in August is a warm 22°C (72°F). The average night-time temperature is usually a cool 10°C (50°F). There are usually 8 hours of bright sunshine each day, which represents 58% of the 14 hours of daylight.

Expect 88mm (3.5 inches) of rainfall across the whole of August with 13 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 August is 13°C (55°F).

Thunder Bay sunrise & sunset times for August 2019

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st August 2019 06:32 21:34
Friday, 2nd August 2019 06:33 21:33
Saturday, 3rd August 2019 06:34 21:31
Sunday, 4th August 2019 06:35 21:30
Monday, 5th August 2019 06:37 21:28
Tuesday, 6th August 2019 06:38 21:27
Wednesday, 7th August 2019 06:40 21:25
Thursday, 8th August 2019 06:41 21:23
Friday, 9th August 2019 06:42 21:22
Saturday, 10th August 2019 06:44 21:20
Sunday, 11th August 2019 06:45 21:18
Monday, 12th August 2019 06:46 21:17
Tuesday, 13th August 2019 06:48 21:15
Wednesday, 14th August 2019 06:49 21:13
Thursday, 15th August 2019 06:51 21:12
Friday, 16th August 2019 06:52 21:10
Saturday, 17th August 2019 06:53 21:08
Sunday, 18th August 2019 06:55 21:06
Monday, 19th August 2019 06:56 21:04
Tuesday, 20th August 2019 06:57 21:02
Wednesday, 21st August 2019 06:59 21:01
Thursday, 22nd August 2019 07:00 20:59
Friday, 23rd August 2019 07:02 20:57
Saturday, 24th August 2019 07:03 20:55
Sunday, 25th August 2019 07:04 20:53
Monday, 26th August 2019 07:06 20:51
Tuesday, 27th August 2019 07:07 20:49
Wednesday, 28th August 2019 07:08 20:47
Thursday, 29th August 2019 07:10 20:45
Friday, 30th August 2019 07:11 20:43
Saturday, 31st August 2019 07:13 20:41
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