Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 2°C. 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 Friday 6th 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 Friday 6th March 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 2-5 mm of sleet/snow expected with 67% chance of some sleet or snow and a light breeze of 10 kph from the east.

  • 2°C maximum temperature2
    °C maximum temperature
  • -8°C minimum temperature-8
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 67% chance of some sleet or snow67
    % chance of some sleet or snow
  • 2-5 mm of sleet/snow expected<5
    mm of sleet/snow expected
  • -1°C wind chill-1
    °C wind chill
  • Light breeze of 10 kph from the East10
    kph 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 3°C, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 35% chance of some sleet or snow and a gentle breeze of 18 kph from the north.

  • 3°C maximum temperature3
    °C maximum temperature
  • -3°C minimum temperature-3
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 35% chance of some sleet or snow35
    % chance of some sleet or snow
  • 2-5 mm of sleet/snow expected<5
    mm of sleet/snow expected
  • -1°C wind chill-1
    °C wind chill
  • Gentle breeze of 18 kph from the North18
    kph wind from N

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Thunder Bay weather for Sunday 8th March 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 89% chance of some sleet or snow and a moderate breeze of 23 kph from the west.

  • 7°C maximum temperature7
    °C maximum temperature
  • -3°C minimum temperature-3
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 89% chance of some sleet or snow89
    % chance of some sleet or snow
  • 0-2 mm of sleet/snow expected<2
    mm of sleet/snow expected
  • 3°C wind chill3
    °C wind chill
  • Moderate breeze of 23 kph from the West23
    kph wind from W

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Thunder Bay weather for Monday 9th March 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 4°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 26 kph from the west.

  • 4°C maximum temperature4
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -1°C wind chill-1
    °C wind chill
  • Moderate breeze of 26 kph from the West26
    kph wind from W

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Thunder Bay weather for Tuesday 10th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -5°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 cm of snow expected with 56% chance of some snow and a gentle breeze of 13 kph from the east.

  • -5°C maximum temperature-5
    °C maximum temperature
  • -10°C minimum temperature-10
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 56% chance of some snow56
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -10°C wind chill-10
    °C wind chill
  • Gentle breeze of 13 kph from the East13
    kph wind from E

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

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