Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -1°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 Tuesday 3rd 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 Tuesday 3rd March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0 cm of snow expected and a light breeze of 7 kph from the north-east.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -9°C minimum temperature-9
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -3°C wind chill-3
    °C wind chill
  • Light breeze of 7 kph from the North-East7
    kph wind from NE

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Thunder Bay weather for Wednesday 4th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 13 kph from the east.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -8°C minimum temperature-8
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -5°C wind chill-5
    °C wind chill
  • Gentle breeze of 13 kph from the East13
    kph wind from E

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Thunder Bay weather for Thursday 5th March 2026

Expect overcast skies in Thunder Bay, Ontario with a maximum temperature of -5°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 15 kph from the east.

  • -5°C maximum temperature-5
    °C maximum temperature
  • -11°C minimum temperature-11
    °C minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -11°C wind chill-11
    °C wind chill
  • Gentle breeze of 15 kph from the East15
    kph wind from E

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Thunder Bay weather for Friday 6th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 2-5 cm of snow expected with 69% chance of some snow and a light breeze of 9 kph from the east.

  • 2°C maximum temperature2
    °C maximum temperature
  • -5°C minimum temperature-5
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 69% chance of some snow69
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -1°C wind chill-1
    °C wind chill
  • Light breeze of 9 kph from the East9
    kph wind from E

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Thunder Bay weather for Saturday 7th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 4°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 2-5 cm of snow expected with 40% chance of some snow and a light breeze of 12 kph from the north.

  • 4°C maximum temperature4
    °C maximum temperature
  • -5°C minimum temperature-5
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 40% chance of some snow40
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • 1°C wind chill1
    °C wind chill
  • Light breeze of 12 kph from the North12
    kph wind from N

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

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