Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -14°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 Friday 2nd 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 Friday 2nd January 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of -14°C, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 19 kph from the west.

  • -14°C maximum temperature-14
    °C maximum temperature
  • -19°C minimum temperature-19
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -23°C wind chill-23
    °C wind chill
  • Gentle breeze of 19 kph from the West19
    kph wind from W

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Thunder Bay weather for Saturday 3rd January 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -12°C, maximum UV of 1 (Low) and 1 hour 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.

  • -12°C maximum temperature-12
    °C maximum temperature
  • -17°C minimum temperature-17
    °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)
  • 40% chance of some snow40
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -18°C wind chill-18
    °C wind chill
  • Light breeze of 12 kph from the North-West12
    kph wind from NW

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Thunder Bay weather for Sunday 4th January 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of -9°C, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 10 kph from the north-west.

  • -9°C maximum temperature-9
    °C maximum temperature
  • -20°C minimum temperature-20
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -14°C wind chill-14
    °C wind chill
  • Light breeze of 10 kph from the North-West10
    kph wind from NW

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Thunder Bay weather for Monday 5th January 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -3°C and no hours of bright sunshine. There are 0-2 cm of snow expected with 33% chance of some snow and a light breeze of 11 kph from the west.

  • -3°C maximum temperature-3
    °C maximum temperature
  • -8°C minimum temperature-8
    °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)
  • 33% chance of some snow33
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -7°C wind chill-7
    °C wind chill
  • Light breeze of 11 kph from the West11
    kph wind from W

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Thunder Bay weather for Tuesday 6th January 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 0°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 58% chance of some snow and a light breeze of 10 kph from the west.

  • 0°C maximum temperature0
    °C maximum temperature
  • -5°C minimum temperature-5
    °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)
  • 58% chance of some snow58
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -4°C wind chill-4
    °C wind chill
  • Light breeze of 10 kph from the West10
    kph wind from W

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

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