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 04:01 on Wednesday 24th 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 24th December 2025

Expect broken clouds 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 cm of snow expected and a gentle breeze of 13 kph from the north-west.

  • -4°C maximum temperature-4
    °C maximum temperature
  • -15°C minimum temperature-15
    °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
  • -9°C wind chill-9
    °C wind chill
  • Gentle breeze of 13 kph from the North-West13
    kph wind from NW

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Thunder Bay weather for Thursday 25th December 2025

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -5°C and no hours of bright sunshine. There are 2-5 cm of snow expected with 86% chance of some snow and a gentle breeze of 19 kph from the east.

  • -5°C maximum temperature-5
    °C maximum temperature
  • -15°C minimum temperature-15
    °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)
  • 86% chance of some snow86
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -12°C wind chill-12
    °C wind chill
  • Gentle breeze of 19 kph from the East19
    kph wind from E

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Thunder Bay weather for Friday 26th December 2025

Expect cloudy with some snow in Thunder Bay, Ontario with a maximum temperature of -2°C and no hours of bright sunshine. There are 10-20 cm of snow expected with 81% chance of some snow and a gentle breeze of 19 kph from the south-east.

  • -2°C maximum temperature-2
    °C maximum temperature
  • -6°C minimum temperature-6
    °C minimum temperature
  • Cloudy with some snow
    cloudy with some snow
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 81% chance of some snow81
    % chance of some snow
  • 10-20 cm of snow expected<20
    cm of snow expected
  • -7°C wind chill-7
    °C wind chill
  • Gentle breeze of 19 kph from the South-East19
    kph wind from SE

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Thunder Bay weather for Saturday 27th December 2025

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 1°C and no hours of bright sunshine. There are 2-5 cm of snow expected with 88% chance of some snow and a light breeze of 11 kph from the south-east.

  • 1°C maximum temperature1
    °C maximum temperature
  • -6°C minimum temperature-6
    °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
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -2°C wind chill-2
    °C wind chill
  • Light breeze of 11 kph from the South-East11
    kph wind from SE

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Thunder Bay weather for Sunday 28th December 2025

Expect overcast with light snow in Thunder Bay, Ontario with a maximum temperature of 0°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0-2 cm of snow expected with 40% chance of some snow and a fresh breeze of 31 kph from the north-west.

  • 0°C maximum temperature0
    °C maximum temperature
  • -15°C minimum temperature-15
    °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)
  • 40% chance of some snow40
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Fresh breeze of 31 kph from the North-West31
    kph wind from NW

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

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