Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 2°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 24th 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 24th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 3 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.

  • 2°C maximum temperature2
    °C maximum temperature
  • -5°C minimum temperature-5
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    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
  • Gentle breeze of 14 kph from the North-West14
    kph wind from NW

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Thunder Bay weather for Wednesday 25th March 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 1°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 5-10 mm of sleet/snow expected with 85% chance of some sleet or snow and a light breeze of 12 kph from the east.

  • 1°C maximum temperature1
    °C maximum temperature
  • -6°C minimum temperature-6
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 85% chance of some sleet or snow85
    % chance of some sleet or snow
  • 5-10 mm of sleet/snow expected<10
    mm of sleet/snow expected
  • -3°C wind chill-3
    °C wind chill
  • Light breeze of 12 kph from the East12
    kph wind from E

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Thunder Bay weather for Thursday 26th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -3°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 18 kph from the north.

  • -3°C maximum temperature-3
    °C maximum temperature
  • -10°C minimum temperature-10
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -8°C wind chill-8
    °C wind chill
  • Gentle breeze of 18 kph from the North18
    kph wind from N

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Thunder Bay weather for Friday 27th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -3°C, maximum UV of 3 (Moderate) and 6 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 20 kph from the west.

  • -3°C maximum temperature-3
    °C maximum temperature
  • -17°C minimum temperature-17
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -9°C wind chill-9
    °C wind chill
  • Moderate breeze of 20 kph from the West20
    kph wind from W

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Thunder Bay weather for Saturday 28th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 0°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 16 kph from the west.

  • 0°C maximum temperature0
    °C maximum temperature
  • -12°C minimum temperature-12
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -5°C wind chill-5
    °C wind chill
  • Gentle breeze of 16 kph from the West16
    kph wind from W

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

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