Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 21°F. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

5-day weather forecast updated at 04:00 on Thursday 5th March 2026 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 Thursday 5th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 21°F, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 16% chance of some snow and a gentle breeze of 11 mph from the east.

  • 21°F maximum temperature21
    °F maximum temperature
  • 9°F minimum temperature9
    °F minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 16% chance of some snow16
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 10°F wind chill10
    °F wind chill
  • Gentle breeze of 11 mph from the East11
    mph wind from E

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Thunder Bay weather for Friday 6th March 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 34°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 63% chance of some sleet or snow and a light breeze of 7 mph from the east.

  • 34°F maximum temperature34
    °F maximum temperature
  • 21°F minimum temperature21
    °F minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 63% chance of some sleet or snow63
    % chance of some sleet or snow
  • 2-5 mm of sleet/snow expected<5
    mm of sleet/snow expected
  • 28°F wind chill28
    °F wind chill
  • Light breeze of 7 mph from the East7
    mph wind from E

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Thunder Bay weather for Saturday 7th March 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 37°F, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 32% chance of some sleet or snow and a gentle breeze of 12 mph from the north-west.

  • 37°F maximum temperature37
    °F maximum temperature
  • 27°F minimum temperature27
    °F minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 32% chance of some sleet or snow32
    % chance of some sleet or snow
  • 2-5 mm of sleet/snow expected<5
    mm of sleet/snow expected
  • 30°F wind chill30
    °F wind chill
  • Gentle breeze of 12 mph from the North-West12
    mph wind from NW

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Thunder Bay weather for Sunday 8th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 48°F, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 14 mph from the west.

  • 48°F maximum temperature48
    °F maximum temperature
  • 28°F minimum temperature28
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 41°F wind chill41
    °F wind chill
  • Moderate breeze of 14 mph from the West14
    mph wind from W

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Thunder Bay weather for Monday 9th March 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 39°F, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0-2 mm of sleet/snow expected with 26% chance of some sleet or snow and a gentle breeze of 11 mph from the west.

  • 39°F maximum temperature39
    °F maximum temperature
  • 21°F minimum temperature21
    °F minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 26% chance of some sleet or snow26
    % chance of some sleet or snow
  • 0-2 mm of sleet/snow expected<2
    mm of sleet/snow expected
  • 34°F wind chill34
    °F wind chill
  • Gentle breeze of 11 mph from the West11
    mph wind from W

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