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 Monday 30th 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 Monday 30th March 2026

Expect broken clouds 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 mm of rainfall expected and a gentle breeze of 13 kph from the east.

  • 1°C maximum temperature1
    °C maximum temperature
  • -6°C minimum temperature-6
    °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
  • -2°C wind chill-2
    °C wind chill
  • Gentle breeze of 13 kph from the East13
    kph wind from E

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Thunder Bay weather for Tuesday 31st March 2026

Expect mostly cloudy with 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 cm of snow expected with 87% chance of some snow and a gentle breeze of 18 kph from the north-east.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Mostly cloudy with snow
    mostly cloudy with snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 87% chance of some snow87
    % chance of some snow
  • 5-10 cm of snow expected<10
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Gentle breeze of 18 kph from the North-East18
    kph wind from NE

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Thunder Bay weather for Wednesday 1st April 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -3°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 12 kph from the north.

  • -3°C maximum temperature-3
    °C maximum temperature
  • -12°C minimum temperature-12
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -7°C wind chill-7
    °C wind chill
  • Light breeze of 12 kph from the North12
    kph wind from N

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Thunder Bay weather for Thursday 2nd April 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 0°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0-2 cm of snow expected with 41% chance of some snow and a moderate breeze of 21 kph from the east.

  • 0°C maximum temperature0
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 41% chance of some snow41
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Moderate breeze of 21 kph from the East21
    kph wind from E

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Thunder Bay weather for Friday 3rd April 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 2-5 cm of snow expected with 43% chance of some snow and a gentle breeze of 19 kph from the north-east.

  • 3°C maximum temperature3
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 43% chance of some snow43
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -1°C wind chill-1
    °C wind chill
  • Gentle breeze of 19 kph from the North-East19
    kph wind from NE

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

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