Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -9°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

5-day weather forecast updated at 04:01 on Wednesday 10th December 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 10th December 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -9°C, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and a gentle breeze of 19 kph from the north-west.

  • -9°C maximum temperature-9
    °C maximum temperature
  • -15°C minimum temperature-15
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 25% chance of some snow25
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -16°C wind chill-16
    °C wind chill
  • Gentle breeze of 19 kph from the North-West19
    kph wind from NW

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Thunder Bay weather for Thursday 11th December 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -7°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 9% chance of some snow and a gentle breeze of 17 kph from the north-west.

  • -7°C maximum temperature-7
    °C maximum temperature
  • -14°C minimum temperature-14
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 9% chance of some snow9
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -13°C wind chill-13
    °C wind chill
  • Gentle breeze of 17 kph from the North-West17
    kph wind from NW

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Thunder Bay weather for Friday 12th December 2025

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -7°C and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 81% chance of some snow and a gentle breeze of 19 kph from the north-west.

  • -7°C maximum temperature-7
    °C maximum temperature
  • -15°C minimum temperature-15
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 81% chance of some snow81
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -14°C wind chill-14
    °C wind chill
  • Gentle breeze of 19 kph from the North-West19
    kph wind from NW

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Thunder Bay weather for Saturday 13th December 2025

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of -16°C, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 19 kph from the north-west.

  • -16°C maximum temperature-16
    °C maximum temperature
  • -22°C minimum temperature-22
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -26°C wind chill-26
    °C wind chill
  • Gentle breeze of 19 kph from the North-West19
    kph wind from NW

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Thunder Bay weather for Sunday 14th December 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -15°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0-2 cm of snow expected with 10% chance of some snow and a gentle breeze of 19 kph from the north-west.

  • -15°C maximum temperature-15
    °C maximum temperature
  • -22°C minimum temperature-22
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 10% chance of some snow10
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -23°C wind chill-23
    °C wind chill
  • Gentle breeze of 19 kph from the North-West19
    kph wind from NW

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

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