Best time to visit Thunder Bay

Find the best time to visit Thunder Bay and plan your perfect trip in 2024/2025. Get holiday inspiration, weather guides, travel advice and find great deals.

Thunder Bay by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ontario

  • Save up to £700 per couple on escorted tours in 2024
  • £400 off Europe, £600 off USA & Canada & £700 off long haul
  • Travel before 31st December 2024 (inclusive)

Expires at 23:59 on Thursday 4th Apr 2024 · View all Cosmos offers

CosmosTour deal finder

When is the best time to visit Thunder Bay?

The best time to visit Thunder Bay is July based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

Change criteria

Max Day Temperature (°C)

  • -9°C maximum daytime temperature in January in Thunder Bay-9
    Jan
  • -6°C maximum daytime temperature in February in Thunder Bay-6
    Feb
  • 0°C maximum daytime temperature in March in Thunder Bay0
    Mar
  • 8°C maximum daytime temperature in April in Thunder Bay8
    Apr
  • 15°C maximum daytime temperature in May in Thunder Bay15
    May
  • 20°C maximum daytime temperature in June in Thunder Bay20
    Jun
  • 24°C maximum daytime temperature in July in Thunder Bay24
    Jul
  • 22°C maximum daytime temperature in August in Thunder Bay22
    Aug
  • 17°C maximum daytime temperature in September in Thunder Bay17
    Sep
  • 10°C maximum daytime temperature in October in Thunder Bay10
    Oct
  • 2°C maximum daytime temperature in November in Thunder Bay2
    Nov
  • -6°C maximum daytime temperature in December in Thunder Bay-6
    Dec

Hours of Sunshine (daily)

Best time to visit

The weather guide for Ontario (Thunder Bay) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Which is the hottest month in Thunder Bay?

The hottest time of year in Thunder Bay is normally July. Expect maximum daytime temperatures to reach 24°C.

Which month has the most rain in Thunder Bay?

In terms of rainfall, August is usually the wettest month in Thunder Bay with 88mm on average. There are normally 13 days in August with some rain.

When is it sunniest in Thunder Bay?

The sunniest time of year in Thunder Bay is normally July with bright sunshine on average for 61% of daylight hours; that's 10 hours of sunshine per day.

When is the sea warmest in Thunder Bay?

The sea is usually at its warmest in Thunder Bay in August when the water temperature reaches 13°C.

Ontario travel features

Do you want to learn more about Ontario? Read our latest features covering travel tips and insider destination guides on where to go and what to do in Ontario.

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

Back to Holiday Weather Top ^