Thunder Bay weather live forecast

Tomorrow's maximum temperature in Thunder Bay is expected to be 1°C.

  • Wednesday
    12th Mar
    Cloudy with sleet or snow (0-2 mm of rainfall expected)
  • Thursday
    13th Mar
    Broken clouds
  • Friday
    14th Mar
    Isolated thunderstorms (2-5 mm of rainfall expected)
  • Saturday
    15th Mar
    Cloudy with sleet or snow (10-20 mm of rainfall expected)
  • Sunday
    16th Mar
    Clear skies with flurries of snow (0-2 cm of snow expected)

5-day weather forecast updated at 04:00 on Wednesday 12th 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 Wednesday 12th March 2025

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 1°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 29% chance of some sleet or snow and a light breeze of 8 kph from the south-east.

  • 1°C maximum temperature1
    °C maximum temperature
  • -8°C minimum temperature-8
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 29% chance of some sleet or snow29
    % chance of some sleet or snow
  • 0-2 mm of sleet/snow expected<2
    mm of sleet/snow expected
  • -1°C wind chill-1
    °C wind chill
  • Light breeze of 8 kph from the South-East8
    kph wind from SE

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Thunder Bay weather for Thursday 13th March 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the west.

  • 3°C maximum temperature3
    °C maximum temperature
  • -5°C minimum temperature-5
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 4 hours of bright sunshine4
    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
  • Light breeze of 12 kph from the West12
    kph wind from W

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Thunder Bay weather for Friday 14th March 2025

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 34% chance of some rain and a gentle breeze of 14 kph from the east.

  • 7°C maximum temperature7
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 34% chance of some rain34
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 4°C wind chill4
    °C wind chill
  • Gentle breeze of 14 kph from the East14
    kph wind from E

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Thunder Bay weather for Saturday 15th March 2025

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 10-20 mm of sleet/snow expected with 89% chance of some sleet or snow and a moderate breeze of 21 kph from the east.

  • 7°C maximum temperature7
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 89% chance of some sleet or snow89
    % chance of some sleet or snow
  • 10-20 mm of sleet/snow expected<20
    mm of sleet/snow expected
  • 3°C wind chill3
    °C wind chill
  • Moderate breeze of 21 kph from the East21
    kph wind from E

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Thunder Bay weather for Sunday 16th March 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0-2 cm of snow expected with 56% chance of some snow and a moderate breeze of 24 kph from the north-west.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 56% chance of some snow56
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -7°C wind chill-7
    °C wind chill
  • Moderate breeze of 24 kph from the North-West24
    kph wind from NW

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

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