Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -3°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 Sunday 15th March 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 15th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -3°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0 cm of snow expected and a fresh breeze of 29 kph from the north-east.

  • -3°C maximum temperature-3
    °C maximum temperature
  • -10°C minimum temperature-10
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -10°C wind chill-10
    °C wind chill
  • Fresh breeze of 29 kph from the North-East29
    kph wind from NE

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Thunder Bay weather for Monday 16th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -10°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0 cm of snow expected and a fresh breeze of 32 kph from the north.

  • -10°C maximum temperature-10
    °C maximum temperature
  • -15°C minimum temperature-15
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -20°C wind chill-20
    °C wind chill
  • Fresh breeze of 32 kph from the North32
    kph wind from N

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Thunder Bay weather for Tuesday 17th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -8°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 18 kph from the north-west.

  • -8°C maximum temperature-8
    °C maximum temperature
  • -19°C minimum temperature-19
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -15°C wind chill-15
    °C wind chill
  • Gentle breeze of 18 kph from the North-West18
    kph wind from NW

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Thunder Bay weather for Wednesday 18th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 2-5 cm of snow expected with 49% chance of some snow and a gentle breeze of 13 kph from the south-west.

  • -1°C maximum temperature-1
    °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
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 49% chance of some snow49
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -5°C wind chill-5
    °C wind chill
  • Gentle breeze of 13 kph from the South-West13
    kph wind from SW

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Thunder Bay weather for Thursday 19th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 4°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 43% chance of some snow and a light breeze of 11 kph from the north-west.

  • 4°C maximum temperature4
    °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 2 (Low)2
    UV index (Low)
  • 43% chance of some snow43
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 2°C wind chill2
    °C wind chill
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

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

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