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 Saturday 28th 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 Saturday 28th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0-2 cm of snow expected with 42% chance of some snow and a gentle breeze of 14 kph from the west.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -12°C minimum temperature-12
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 42% chance of some snow42
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -5°C wind chill-5
    °C wind chill
  • Gentle breeze of 14 kph from the West14
    kph wind from W

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Thunder Bay weather for Sunday 29th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the east.

  • 2°C maximum temperature2
    °C maximum temperature
  • -9°C minimum temperature-9
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    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
  • Light breeze of 8 kph from the East8
    kph wind from E

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Thunder Bay weather for Monday 30th March 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 77% chance of some sleet or snow and a gentle breeze of 17 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
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 77% chance of some sleet or snow77
    % chance of some sleet or snow
  • 0-2 mm of sleet/snow expected<2
    mm of sleet/snow expected
  • -3°C wind chill-3
    °C wind chill
  • Gentle breeze of 17 kph from the East17
    kph wind from E

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Thunder Bay weather for Tuesday 31st March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 2-5 cm of snow expected with 67% chance of some snow and a gentle breeze of 18 kph from the north.

  • 2°C maximum temperature2
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 67% chance of some snow67
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -2°C wind chill-2
    °C wind chill
  • Gentle breeze of 18 kph from the North18
    kph wind from N

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Thunder Bay weather for Wednesday 1st April 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of -2°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 13 kph from the north.

  • -2°C maximum temperature-2
    °C maximum temperature
  • -11°C minimum temperature-11
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Gentle breeze of 13 kph from the North13
    kph wind from N

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

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