Thunder Bay weather in July 2026

Expect daytime maximum temperatures of 24°C in Thunder Bay, Ontario in July based on long-term weather averages. There are 10 hours of sunshine per day on average with 12 days with some rainfall and typically 82 mm of rainfall in the month.

  • 24°C maximum daytime temperature in July in Thunder Bay24
    24°C max day temperature
  • 10 hours of sunshine per day
  • 12 days with some rainfall in July in Thunder Bay12
    12 days with some rainfall
  • 11°C minimum night-time temperature in July in Thunder Bay11
    11°C min night temperature
  • 16 hours of daylight per day in July in Thunder Bay16
    16 hours of daylight per day
  • No heat & humidity in July in Thunder Bay0
    No heat & humidity
  • 82 mm monthly rainfall in July in Thunder Bay82
    82 mm of monthly rainfall
  • UV (maximum) index 7 (High) in July in Thunder Bay7
    7 (High) UV index
  • 7°C sea temperature in July in Thunder Bay7
    7°C sea temperature

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The July 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Thunder Bay in July?

Daytime temperatures usually reach 27°C in Thunder Bay in July with low heat and humidity, falling to 16°C at night.

How sunny is it in Thunder Bay in July?

There are normally 9 hours of bright sunshine each day in Thunder Bay in July - that's 60% of daylight hours.

How warm is the sea around Thunder Bay in July?

The average sea temperature around Thunder Bay in July is 19°C.

Does it rain in Thunder Bay in July?

There are usually 9 days with some rain in Thunder Bay in July and the average monthly rainfall is 70mm.

Thunder Bay July sunrise & sunset times

Browse the sunrise and sunset times for Thunder Bay in July 2026. Select a month to view Thunder Bay sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st July 2026 05:00 21:02
Thursday, 16th July 2026 05:13 20:53
Friday, 31st July 2026 05:31 20:35

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