Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -6°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 Thursday 11th 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 Thursday 11th December 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -6°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and a gentle breeze of 17 kph from the north-west.

  • -6°C maximum temperature-6
    °C maximum temperature
  • -13°C minimum temperature-13
    °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)
  • 25% chance of some snow25
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -12°C wind chill-12
    °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 no hours of bright sunshine. There are 0-2 cm of snow expected with 88% chance of some snow and a moderate breeze of 21 kph from the north-west.

  • -7°C maximum temperature-7
    °C maximum temperature
  • -16°C minimum temperature-16
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 88% chance of some snow88
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -15°C wind chill-15
    °C wind chill
  • Moderate breeze of 21 kph from the North-West21
    kph wind from NW

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Thunder Bay weather for Saturday 13th December 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -16°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 15% chance of some snow and a moderate breeze of 23 kph from the north-west.

  • -16°C maximum temperature-16
    °C maximum temperature
  • -21°C minimum temperature-21
    °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)
  • 15% chance of some snow15
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -26°C wind chill-26
    °C wind chill
  • Moderate breeze of 23 kph from the North-West23
    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 -11°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 39% chance of some snow and a gentle breeze of 19 kph from the north-west.

  • -11°C maximum temperature-11
    °C maximum temperature
  • -21°C minimum temperature-21
    °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)
  • 39% chance of some snow39
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -19°C wind chill-19
    °C wind chill
  • Gentle breeze of 19 kph from the North-West19
    kph wind from NW

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Thunder Bay weather for Monday 15th 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 4 hours of bright sunshine. There are 2-5 cm of snow expected with 40% 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
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 40% chance of some snow40
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -14°C wind chill-14
    °C wind chill
  • Gentle breeze of 17 kph from the North-West17
    kph wind from NW

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

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