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 Friday 3rd April 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 3rd April 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 40% chance of some sleet or snow and a moderate breeze of 20 kph from the north-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
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 40% chance of some sleet or snow40
    % chance of some sleet or snow
  • 5-10 mm of sleet/snow expected<10
    mm of sleet/snow expected
  • -2°C wind chill-2
    °C wind chill
  • Moderate breeze of 20 kph from the North-East20
    kph wind from NE

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Thunder Bay weather for Saturday 4th April 2026

Expect cloudy with some snow in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 10-20 cm of snow expected with 100% chance of some snow and a moderate breeze of 25 kph from the north-east.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -6°C minimum temperature-6
    °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)
  • 100% chance of some snow100
    % chance of some snow
  • 10-20 cm of snow expected<20
    cm of snow expected
  • -7°C wind chill-7
    °C wind chill
  • Moderate breeze of 25 kph from the North-East25
    kph wind from NE

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Thunder Bay weather for Sunday 5th April 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 4°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0-2 cm of snow expected with 37% chance of some snow and a moderate breeze of 22 kph from the north-west.

  • 4°C maximum temperature4
    °C maximum temperature
  • -6°C minimum temperature-6
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 37% chance of some snow37
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 0°C wind chill0
    °C wind chill
  • Moderate breeze of 22 kph from the North-West22
    kph wind from NW

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Thunder Bay weather for Monday 6th April 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -2°C, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 0-2 cm of snow expected with 40% chance of some snow and a moderate breeze of 21 kph from the north.

  • -2°C maximum temperature-2
    °C maximum temperature
  • -9°C minimum temperature-9
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 40% chance of some snow40
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -7°C wind chill-7
    °C wind chill
  • Moderate breeze of 21 kph from the North21
    kph wind from N

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Thunder Bay weather for Tuesday 7th April 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 0°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and a gentle breeze of 17 kph from the south.

  • 0°C maximum temperature0
    °C maximum temperature
  • -13°C minimum temperature-13
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 25% chance of some snow25
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -5°C wind chill-5
    °C wind chill
  • Gentle breeze of 17 kph from the South17
    kph wind from S

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

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