Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -1°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 Wednesday 4th 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 Wednesday 4th 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 1 hour of bright sunshine. There are 0-2 cm of snow expected with 37% chance of some snow and a gentle breeze of 16 kph from the north-east.

  • -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 2 (Low)2
    UV index (Low)
  • 37% chance of some snow37
    % 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 16 kph from the North-East16
    kph wind from NE

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Thunder Bay weather for Thursday 5th March 2026

Expect overcast with light snow in Thunder Bay, Ontario with a maximum temperature of -5°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0-2 cm of snow expected with 27% chance of some snow and a gentle breeze of 16 kph from the east.

  • -5°C maximum temperature-5
    °C maximum temperature
  • -13°C minimum temperature-13
    °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)
  • 27% chance of some snow27
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -11°C wind chill-11
    °C wind chill
  • Gentle breeze of 16 kph from the East16
    kph wind from E

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Thunder Bay weather for Friday 6th March 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 mm of sleet/snow expected with 57% chance of some sleet or snow and a gentle breeze of 14 kph from the south-east.

  • 3°C maximum temperature3
    °C maximum temperature
  • -5°C minimum temperature-5
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 57% chance of some sleet or snow57
    % chance of some sleet or snow
  • 0-2 mm of sleet/snow expected<2
    mm of sleet/snow expected
  • 0°C wind chill0
    °C wind chill
  • Gentle breeze of 14 kph from the South-East14
    kph wind from SE

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Thunder Bay weather for Saturday 7th March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the north-west.

  • 3°C maximum temperature3
    °C maximum temperature
  • -6°C minimum temperature-6
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -1°C wind chill-1
    °C wind chill
  • Gentle breeze of 19 kph from the North-West19
    kph wind from NW

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Thunder Bay weather for Sunday 8th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0-2 cm of snow expected with 20% chance of some snow and a moderate breeze of 21 kph from the west.

  • 7°C maximum temperature7
    °C maximum temperature
  • -2°C minimum temperature-2
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 4 hours of bright sunshine4
    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
  • 3°C wind chill3
    °C wind chill
  • Moderate breeze of 21 kph from the West21
    kph wind from W

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

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