Thunder Bay weather live forecast

Tomorrow's maximum temperature in Thunder Bay is expected to be 64°F.

5-day weather forecast updated at 04:00 on Sunday 15th June 2025 GMT

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The 5-day weather forecast for Ontario (Thunder Bay) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Thunder Bay weather forecast by day

Below are the detailed weather forecasts for Thunder Bay for the next 5 days.

Thunder Bay weather for Sunday 15th June 2025

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 64°F, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the south-east.

  • 64°F maximum temperature64
    °F maximum temperature
  • 43°F minimum temperature43
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 64°F wind chill64
    °F wind chill
  • Gentle breeze of 8 mph from the South-East8
    mph wind from SE

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Thunder Bay weather for Monday 16th June 2025

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 66°F, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 59% chance of some rain and a light breeze of 7 mph from the south-east.

  • 66°F maximum temperature66
    °F maximum temperature
  • 46°F minimum temperature46
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 59% chance of some rain59
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 7 mph from the South-East7
    mph wind from SE

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Thunder Bay weather for Tuesday 17th June 2025

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 73°F, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 10-20 mm of rainfall expected with 40% chance of some rain and a gentle breeze of 11 mph from the west.

  • 73°F maximum temperature73
    °F maximum temperature
  • 50°F minimum temperature50
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 40% chance of some rain40
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 11 mph from the West11
    mph wind from W

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Thunder Bay weather for Wednesday 18th June 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 73°F, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the north-west.

  • 73°F maximum temperature73
    °F maximum temperature
  • 52°F minimum temperature52
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 73°F wind chill73
    °F wind chill
  • Light breeze of 6 mph from the North-West6
    mph wind from NW

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Thunder Bay weather for Thursday 19th June 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 66°F, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the south-east.

  • 66°F maximum temperature66
    °F maximum temperature
  • 50°F minimum temperature50
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 7 mph from the South-East7
    mph wind from SE

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  • Destinations across Europe, Americas, Asia, Africa & beyond
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