Thunder Bay weather live forecast

Tomorrow's maximum temperature in Thunder Bay is expected to be 9°C.

  • Sunday
    13th Apr
    Mostly cloudy with light rain (2-5 mm of rainfall expected)
  • Monday
    14th Apr
    Cloudy with sleet or snow (20-30 mm of rainfall expected)
  • Tuesday
    15th Apr
    Broken clouds
  • Wednesday
    16th Apr
    Scattered clouds
  • Thursday
    17th Apr
    Clear skies with flurries of snow (0-2 cm of snow expected)

5-day weather forecast updated at 04:00 on Sunday 13th April 2025 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 13th April 2025

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 9°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 75% chance of some rain and a light breeze of 11 kph from the east.

  • 9°C maximum temperature9
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 75% chance of some rain75
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 7°C wind chill7
    °C wind chill
  • Light breeze of 11 kph from the East11
    kph wind from E

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Thunder Bay weather for Monday 14th April 2025

Expect cloudy with sleet or 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 20-30 mm of sleet/snow expected with 96% chance of some sleet or snow and a fresh breeze of 30 kph from the north-west.

  • 5°C maximum temperature5
    °C maximum temperature
  • 1°C minimum temperature1
    °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)
  • 96% chance of some sleet or snow96
    % chance of some sleet or snow
  • 20-30 mm of sleet/snow expected<30
    mm of sleet/snow expected
  • -1°C wind chill-1
    °C wind chill
  • Fresh breeze of 30 kph from the North-West30
    kph wind from NW

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Thunder Bay weather for Tuesday 15th April 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 5°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 30 kph from the north-west.

  • 5°C maximum temperature5
    °C maximum temperature
  • -2°C minimum temperature-2
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 0°C wind chill0
    °C wind chill
  • Fresh breeze of 30 kph from the North-West30
    kph wind from NW

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Thunder Bay weather for Wednesday 16th April 2025

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 6°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north-west.

  • 6°C maximum temperature6
    °C maximum temperature
  • -6°C minimum temperature-6
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 3°C wind chill3
    °C wind chill
  • Gentle breeze of 13 kph from the North-West13
    kph wind from NW

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Thunder Bay weather for Thursday 17th April 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of 6°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0-2 cm of snow expected with 49% chance of some snow and a gentle breeze of 19 kph from the east.

  • 6°C maximum temperature6
    °C maximum temperature
  • -2°C minimum temperature-2
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 49% chance of some snow49
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 2°C wind chill2
    °C wind chill
  • Gentle breeze of 19 kph from the East19
    kph wind from E

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

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