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 Monday 9th 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 Monday 9th March 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 16% chance of some rain and a moderate breeze of 22 kph from the west.

  • 3°C maximum temperature3
    °C maximum temperature
  • -5°C minimum temperature-5
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 16% chance of some rain16
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • -2°C wind chill-2
    °C wind chill
  • Moderate breeze of 22 kph from the West22
    kph wind from W

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Thunder Bay weather for Tuesday 10th 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 no hours of bright sunshine. There are 0-2 cm of snow expected with 15% chance of some snow and a light breeze of 11 kph from the east.

  • -4°C maximum temperature-4
    °C maximum temperature
  • -9°C minimum temperature-9
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 15% chance of some snow15
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -9°C wind chill-9
    °C wind chill
  • Light breeze of 11 kph from the East11
    kph wind from E

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Thunder Bay weather for Wednesday 11th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 20% chance of some snow and a gentle breeze of 17 kph from the north.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -9°C minimum temperature-9
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 20% chance of some snow20
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Gentle breeze of 17 kph from the North17
    kph wind from N

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Thunder Bay weather for Thursday 12th March 2026

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -3°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 75% chance of some snow and a moderate breeze of 20 kph from the south-east.

  • -3°C maximum temperature-3
    °C maximum temperature
  • -14°C minimum temperature-14
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 75% chance of some snow75
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -9°C wind chill-9
    °C wind chill
  • Moderate breeze of 20 kph from the South-East20
    kph wind from SE

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Thunder Bay weather for Friday 13th March 2026

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -3°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 5-10 cm of snow expected with 50% chance of some snow and a moderate breeze of 26 kph from the north-west.

  • -3°C maximum temperature-3
    °C maximum temperature
  • -11°C minimum temperature-11
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 50% chance of some snow50
    % chance of some snow
  • 5-10 cm of snow expected<10
    cm of snow expected
  • -10°C wind chill-10
    °C wind chill
  • Moderate breeze of 26 kph from the North-West26
    kph wind from NW

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

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