Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -4°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 Thursday 12th 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 12th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -4°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 27 kph from the north-west.

  • -4°C maximum temperature-4
    °C maximum temperature
  • -11°C minimum temperature-11
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -11°C wind chill-11
    °C wind chill
  • Moderate breeze of 27 kph from the North-West27
    kph wind from NW

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Thunder Bay weather for Friday 13th March 2026

Expect cloudy with some snow in Thunder Bay, Ontario with a maximum temperature of -3°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 5-10 cm of snow expected with 45% chance of some snow and a fresh breeze of 30 kph from the north.

  • -3°C maximum temperature-3
    °C maximum temperature
  • -10°C minimum temperature-10
    °C minimum temperature
  • Cloudy with some snow
    cloudy with some snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 45% chance of some snow45
    % chance of some snow
  • 5-10 cm of snow expected<10
    cm of snow expected
  • -11°C wind chill-11
    °C wind chill
  • Fresh breeze of 30 kph from the North30
    kph wind from N

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Thunder Bay weather for Saturday 14th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -2°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 11 kph from the south-west.

  • -2°C maximum temperature-2
    °C maximum temperature
  • -16°C minimum temperature-16
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Light breeze of 11 kph from the South-West11
    kph wind from SW

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Thunder Bay weather for Sunday 15th March 2026

Expect overcast skies in Thunder Bay, Ontario with a maximum temperature of -7°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 23 kph from the north.

  • -7°C maximum temperature-7
    °C maximum temperature
  • -14°C minimum temperature-14
    °C minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -15°C wind chill-15
    °C wind chill
  • Moderate breeze of 23 kph from the North23
    kph wind from N

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Thunder Bay weather for Monday 16th March 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of -10°C, maximum UV of 2 (Low) and 11 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 27 kph from the north.

  • -10°C maximum temperature-10
    °C maximum temperature
  • -18°C minimum temperature-18
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -19°C wind chill-19
    °C wind chill
  • Moderate breeze of 27 kph from the North27
    kph wind from N

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

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