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 Monday 6th 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 Monday 6th April 2026

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0-2 cm of snow expected with 16% chance of some snow and a moderate breeze of 22 kph from the north-west.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -9°C minimum temperature-9
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 16% chance of some snow16
    % 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 22 kph from the North-West22
    kph wind from NW

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Thunder Bay weather for Tuesday 7th April 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 1°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the west.

  • 1°C maximum temperature1
    °C maximum temperature
  • -14°C minimum temperature-14
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -3°C wind chill-3
    °C wind chill
  • Gentle breeze of 14 kph from the West14
    kph wind from W

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Thunder Bay weather for Wednesday 8th April 2026

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 100% chance of some sleet or snow and a gentle breeze of 19 kph from the south-east.

  • 3°C maximum temperature3
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 100% chance of some sleet or snow100
    % 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
  • Gentle breeze of 19 kph from the South-East19
    kph wind from SE

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Thunder Bay weather for Thursday 9th April 2026

Expect sunshine and showers in Thunder Bay, Ontario with a maximum temperature of 4°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 24% chance of some rain and a moderate breeze of 23 kph from the west.

  • 4°C maximum temperature4
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 24% chance of some rain24
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • -1°C wind chill-1
    °C wind chill
  • Moderate breeze of 23 kph from the West23
    kph wind from W

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Thunder Bay weather for Friday 10th April 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 4°C, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.

  • 4°C maximum temperature4
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 1°C wind chill1
    °C wind chill
  • Light breeze of 10 kph from the North-West10
    kph wind from NW

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

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