Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -5°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 Friday 16th 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 16th January 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -5°C and 1 hour of bright sunshine. There are 2-5 cm of snow expected with 58% chance of some snow and a gentle breeze of 13 kph from the north.

  • -5°C maximum temperature-5
    °C maximum temperature
  • -10°C minimum temperature-10
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 58% chance of some snow58
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -10°C wind chill-10
    °C wind chill
  • Gentle breeze of 13 kph from the North13
    kph wind from N

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Thunder Bay weather for Saturday 17th January 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -7°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 18 kph from the north.

  • -7°C maximum temperature-7
    °C maximum temperature
  • -19°C minimum temperature-19
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 1 hour of bright sunshine1
    hour 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
  • Gentle breeze of 18 kph from the North18
    kph wind from N

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Thunder Bay weather for Sunday 18th January 2026

Expect cloudy with some snow in Thunder Bay, Ontario with a maximum temperature of -12°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 cm of snow expected with 84% chance of some snow and a moderate breeze of 27 kph from the north-west.

  • -12°C maximum temperature-12
    °C maximum temperature
  • -21°C minimum temperature-21
    °C minimum temperature
  • Cloudy with some snow
    cloudy with some snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 84% chance of some snow84
    % chance of some snow
  • 5-10 cm of snow expected<10
    cm of snow expected
  • -21°C wind chill-21
    °C wind chill
  • Moderate breeze of 27 kph from the North-West27
    kph wind from NW

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Thunder Bay weather for Monday 19th January 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -20°C, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 27 kph from the north-west.

  • -20°C maximum temperature-20
    °C maximum temperature
  • -26°C minimum temperature-26
    °C minimum temperature
  • Broken clouds
    broken 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
  • -32°C wind chill-32
    °C wind chill
  • Moderate breeze of 27 kph from the North-West27
    kph wind from NW

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Thunder Bay weather for Tuesday 20th 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 light breeze of 12 kph from the west.

  • -18°C maximum temperature-18
    °C maximum temperature
  • -30°C minimum temperature-30
    °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
  • -26°C wind chill-26
    °C wind chill
  • Light breeze of 12 kph from the West12
    kph wind from W

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

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