Thunder Bay weather live forecast

Tomorrow's maximum temperature in Thunder Bay is expected to be 48°F.

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 48°F, 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 7 mph from the east.

  • 48°F maximum temperature48
    °F maximum temperature
  • 32°F minimum temperature32
    °F 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
  • 45°F wind chill45
    °F wind chill
  • Light breeze of 7 mph from the East7
    mph 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 41°F, 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 19 mph from the north-west.

  • 41°F maximum temperature41
    °F maximum temperature
  • 34°F minimum temperature34
    °F 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
  • 30°F wind chill30
    °F wind chill
  • Fresh breeze of 19 mph from the North-West19
    mph 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 41°F, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 19 mph from the north-west.

  • 41°F maximum temperature41
    °F maximum temperature
  • 28°F minimum temperature28
    °F 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
  • 32°F wind chill32
    °F wind chill
  • Fresh breeze of 19 mph from the North-West19
    mph 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 43°F, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the north-west.

  • 43°F maximum temperature43
    °F maximum temperature
  • 21°F minimum temperature21
    °F 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
  • 37°F wind chill37
    °F wind chill
  • Gentle breeze of 8 mph from the North-West8
    mph 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 43°F, 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 12 mph from the east.

  • 43°F maximum temperature43
    °F maximum temperature
  • 28°F minimum temperature28
    °F 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
  • 36°F wind chill36
    °F wind chill
  • Gentle breeze of 12 mph from the East12
    mph wind from E

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