Thunder Bay weather live forecast

Tomorrow's maximum temperature in Thunder Bay is expected to be 0°C.

  • Monday
    17th Mar
    Mostly cloudy with snow (5-10 cm of snow expected)
  • Tuesday
    18th Mar
    Broken clouds
  • Wednesday
    19th Mar
    Broken clouds
  • Thursday
    20th Mar
    Scattered clouds
  • Friday
    21st Mar
    Overcast skies

5-day weather forecast updated at 04:00 on Monday 17th March 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 Monday 17th March 2025

Expect mostly cloudy with snow in Thunder Bay, Ontario with a maximum temperature of 0°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 cm of snow expected with 82% chance of some snow and a gentle breeze of 16 kph from the east.

  • 0°C maximum temperature0
    °C maximum temperature
  • -5°C minimum temperature-5
    °C minimum temperature
  • Mostly cloudy with snow
    mostly cloudy with snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 82% chance of some snow82
    % chance of some snow
  • 5-10 cm of snow expected<10
    cm of snow expected
  • -4°C wind chill-4
    °C wind chill
  • Gentle breeze of 16 kph from the East16
    kph wind from E

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Thunder Bay weather for Tuesday 18th March 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north.

  • 2°C maximum temperature2
    °C maximum temperature
  • -5°C minimum temperature-5
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -2°C wind chill-2
    °C wind chill
  • Gentle breeze of 14 kph from the North14
    kph wind from N

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Thunder Bay weather for Wednesday 19th March 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the north.

  • 3°C maximum temperature3
    °C maximum temperature
  • -3°C minimum temperature-3
    °C minimum temperature
  • Broken clouds
    broken clouds
  • No hours of bright sunshine0
    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 22 kph from the North22
    kph wind from N

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Thunder Bay weather for Thursday 20th March 2025

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the north-west.

  • 2°C maximum temperature2
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -3°C wind chill-3
    °C wind chill
  • Gentle breeze of 18 kph from the North-West18
    kph wind from NW

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Thunder Bay weather for Friday 21st March 2025

Expect overcast skies in Thunder Bay, Ontario with a maximum temperature of 4°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-west.

  • 4°C maximum temperature4
    °C maximum temperature
  • -5°C minimum temperature-5
    °C minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 0°C wind chill0
    °C wind chill
  • Gentle breeze of 13 kph from the South-West13
    kph wind from SW

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

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