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

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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 = 72 - 86°F [remove]
Daily hours of sunshine = 10 hours or more [remove]

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Max Day Temperature (°F)

  • 16°F maximum daytime temperature in January in Thunder Bay16
    Jan
  • 21°F maximum daytime temperature in February in Thunder Bay21
    Feb
  • 32°F maximum daytime temperature in March in Thunder Bay32
    Mar
  • 46°F maximum daytime temperature in April in Thunder Bay46
    Apr
  • 59°F maximum daytime temperature in May in Thunder Bay59
    May
  • 68°F maximum daytime temperature in June in Thunder Bay68
    Jun
  • 75°F maximum daytime temperature in July in Thunder Bay75
    Jul
  • 72°F maximum daytime temperature in August in Thunder Bay72
    Aug
  • 63°F maximum daytime temperature in September in Thunder Bay63
    Sep
  • 50°F maximum daytime temperature in October in Thunder Bay50
    Oct
  • 36°F maximum daytime temperature in November in Thunder Bay36
    Nov
  • 21°F maximum daytime temperature in December in Thunder Bay21
    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)  |  Imperial (°F)

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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 75°F.

Which month has the most rain in Thunder Bay?

In terms of rainfall, August is usually the wettest month in Thunder Bay with 3.5 inches 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 55°F.

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