Thunder Bay weather in July 2026

Expect daytime maximum temperatures of 75°F 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 3.2 inches of rainfall in the month.

  • 75°F maximum daytime temperature in July in Thunder Bay75
    75°F max day temperature
  • 10 hours of sunshine per day
  • 12 days with some rainfall in July in Thunder Bay12
    12 days with some rainfall
  • 52°F minimum night-time temperature in July in Thunder Bay52
    52°F 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
  • 3.2 inches monthly rainfall in July in Thunder Bay3.2
    3.2 inches of monthly rainfall
  • UV (maximum) index 7 (High) in July in Thunder Bay7
    7 (High) UV index
  • 45°F sea temperature in July in Thunder Bay45
    45°F 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)  |  Imperial (°F)

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More about Ontario

How hot is it in Thunder Bay in July?

Daytime temperatures usually reach 81°F in Thunder Bay in July with low heat and humidity, falling to 61°F 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 66°F.

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 2.8 inches.

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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