Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -4°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 Saturday 29th November 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 29th November 2025

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -4°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and a light breeze of 9 kph from the north-west.

  • -4°C maximum temperature-4
    °C maximum temperature
  • -12°C minimum temperature-12
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 2 hours of bright sunshine2
    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
  • -8°C wind chill-8
    °C wind chill
  • Light breeze of 9 kph from the North-West9
    kph wind from NW

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Thunder Bay weather for Sunday 30th November 2025

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -6°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0-2 cm of snow expected with 4% chance of some snow and a moderate breeze of 20 kph from the north-west.

  • -6°C maximum temperature-6
    °C maximum temperature
  • -13°C minimum temperature-13
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 4% chance of some snow4
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -13°C wind chill-13
    °C wind chill
  • Moderate breeze of 20 kph from the North-West20
    kph wind from NW

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Thunder Bay weather for Monday 1st December 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -6°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 14 kph from the west.

  • -6°C maximum temperature-6
    °C maximum temperature
  • -14°C minimum temperature-14
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -11°C wind chill-11
    °C wind chill
  • Gentle breeze of 14 kph from the West14
    kph wind from W

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Thunder Bay weather for Tuesday 2nd December 2025

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -5°C and 2 hours of bright sunshine. There are 0-2 cm of snow expected with 8% chance of some snow and a light breeze of 11 kph from the west.

  • -5°C maximum temperature-5
    °C maximum temperature
  • -14°C minimum temperature-14
    °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)
  • 8% chance of some snow8
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -10°C wind chill-10
    °C wind chill
  • Light breeze of 11 kph from the West11
    kph wind from W

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Thunder Bay weather for Wednesday 3rd December 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -9°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 24 kph from the north-west.

  • -9°C maximum temperature-9
    °C maximum temperature
  • -18°C minimum temperature-18
    °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
  • -17°C wind chill-17
    °C wind chill
  • Moderate breeze of 24 kph from the North-West24
    kph wind from NW

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