Thunder Bay weather in June 2025

Expect 20°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Thunder Bay in June. Check more long-term weather averages for Thunder Bay in June before you book your next holiday to Ontario in 2025/2026.

  • 20°C maximum daytime temperature in June in Thunder Bay20
    20°C max day temperature
  • 9 hours of sunshine per day
  • 13 days with some rainfall in June in Thunder Bay13
    13 days with some rainfall
  • 7°C minimum night-time temperature in June in Thunder Bay7
    7°C min night temperature
  • 16 hours of daylight per day in June in Thunder Bay16
    16 hours of daylight per day
  • No heat & humidity in June in Thunder Bay0
    No heat & humidity
  • 82 mm monthly rainfall in June in Thunder Bay82
    82 mm of monthly rainfall
  • UV (maximum) index 7 (High) in June in Thunder Bay7
    7 (High) UV index
  • 4°C sea temperature in June in Thunder Bay4
    4°C sea temperature

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The June 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 June?

Daytime temperatures usually reach 20°C in Thunder Bay in June, falling to 7°C at night.

How sunny is it in Thunder Bay in June?

There are normally 9 hours of bright sunshine each day in Thunder Bay in June - that's 54% of daylight hours.

Is the sea cold around Thunder Bay in June?

The average sea temperature around Thunder Bay in June is 4°C.

Does it rain in Thunder Bay in June?

There are usually 13 days with some rain in Thunder Bay in June and the average monthly rainfall is 82mm.

Thunder Bay June sunrise & sunset times

Browse the sunrise and sunset times for Thunder Bay in June 2025. Select a month to view Thunder Bay sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st June 2025 05:00 20:51
Sunday, 15th June 2025 04:55 21:01
Monday, 30th June 2025 04:59 21:02

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