Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -13°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 17th January 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 Sunday 18th January 2026

Expect overcast with light snow in Thunder Bay, Ontario with a maximum temperature of -13°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0-2 cm of snow expected with 94% chance of some snow and a moderate breeze of 22 kph from the north.

  • -13°C maximum temperature-13
    °C maximum temperature
  • -22°C minimum temperature-22
    °C minimum temperature
  • Overcast with light snow
    overcast with light snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 94% chance of some snow94
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -22°C wind chill-22
    °C wind chill
  • Moderate breeze of 22 kph from the North22
    kph wind from N

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Thunder Bay weather for Monday 19th January 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -18°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 22 kph from the north-west.

  • -18°C maximum temperature-18
    °C maximum temperature
  • -27°C minimum temperature-27
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -28°C wind chill-28
    °C wind chill
  • Moderate breeze of 22 kph from the North-West22
    kph wind from NW

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Thunder Bay weather for Tuesday 20th January 2026

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -17°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 15 kph from the west.

  • -17°C maximum temperature-17
    °C maximum temperature
  • -26°C minimum temperature-26
    °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
  • -25°C wind chill-25
    °C wind chill
  • Gentle breeze of 15 kph from the West15
    kph wind from W

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Thunder Bay weather for Wednesday 21st January 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -14°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 16% chance of some snow and a light breeze of 11 kph from the north-west.

  • -14°C maximum temperature-14
    °C maximum temperature
  • -23°C minimum temperature-23
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 16% chance of some snow16
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -20°C wind chill-20
    °C wind chill
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

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Thunder Bay weather for Thursday 22nd January 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of -19°C, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 15 kph from the north-west.

  • -19°C maximum temperature-19
    °C maximum temperature
  • -26°C minimum temperature-26
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -28°C wind chill-28
    °C wind chill
  • Gentle breeze of 15 kph from the North-West15
    kph wind from NW

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

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