Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -12°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 Saturday 6th 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 Saturday 6th December 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -12°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.

  • -12°C maximum temperature-12
    °C maximum temperature
  • -16°C minimum temperature-16
    °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
  • -19°C wind chill-19
    °C wind chill
  • Gentle breeze of 17 kph from the North-West17
    kph wind from NW

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Thunder Bay weather for Sunday 7th December 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -12°C, maximum UV of 1 (Low) and 9 hours of bright sunshine. There are 0-2 cm of snow expected with 2% chance of some snow and a gentle breeze of 15 kph from the north-west.

  • -12°C maximum temperature-12
    °C maximum temperature
  • -18°C minimum temperature-18
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 2% chance of some snow2
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -20°C wind chill-20
    °C wind chill
  • Gentle breeze of 15 kph from the North-West15
    kph wind from NW

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Thunder Bay weather for Monday 8th December 2025

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -7°C and 2 hours of bright sunshine. There are 2-5 cm of snow expected with 59% chance of some snow and a light breeze of 12 kph from the south-west.

  • -7°C maximum temperature-7
    °C maximum temperature
  • -18°C minimum temperature-18
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 2 hours of bright sunshine2
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 59% chance of some snow59
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -12°C wind chill-12
    °C wind chill
  • Light breeze of 12 kph from the South-West12
    kph wind from SW

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Thunder Bay weather for Tuesday 9th 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 40% chance of some snow and a light breeze of 12 kph from the north-west.

  • -6°C maximum temperature-6
    °C maximum temperature
  • -10°C minimum temperature-10
    °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)
  • 40% chance of some snow40
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -11°C wind chill-11
    °C wind chill
  • Light breeze of 12 kph from the North-West12
    kph wind from NW

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Thunder Bay weather for Wednesday 10th December 2025

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -10°C and 3 hours of bright sunshine. There are 0-2 cm of snow expected with 17% chance of some snow and a gentle breeze of 15 kph from the north.

  • -10°C maximum temperature-10
    °C maximum temperature
  • -16°C minimum temperature-16
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 3 hours of bright sunshine3
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 17% chance of some snow17
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -17°C wind chill-17
    °C wind chill
  • Gentle breeze of 15 kph from the North15
    kph wind from N

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

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