Thunder Bay weather live forecast

Tomorrow's maximum temperature in Thunder Bay is expected to be 1°C.

5-day weather forecast updated at 04:00 on Monday 31st March 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 Monday 31st March 2025

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 1°C, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-west.

  • 1°C maximum temperature1
    °C maximum temperature
  • -10°C minimum temperature-10
    °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
  • -3°C wind chill-3
    °C wind chill
  • Gentle breeze of 17 kph from the North-West17
    kph wind from NW

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Thunder Bay weather for Tuesday 1st April 2025

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 0°C, maximum UV of 4 (Moderate) and 12 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 18 kph from the east.

  • 0°C maximum temperature0
    °C maximum temperature
  • -10°C minimum temperature-10
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -5°C wind chill-5
    °C wind chill
  • Gentle breeze of 18 kph from the East18
    kph wind from E

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Thunder Bay weather for Wednesday 2nd April 2025

Expect mostly cloudy with 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 20-30 cm of snow expected with 100% chance of some snow and a fresh breeze of 34 kph from the east.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -3°C minimum temperature-3
    °C minimum temperature
  • Mostly cloudy with snow
    mostly cloudy with 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
  • 20-30 cm of snow expected<30
    cm of snow expected
  • -8°C wind chill-8
    °C wind chill
  • Fresh breeze of 34 kph from the East34
    kph wind from E

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Thunder Bay weather for Thursday 3rd April 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of 3°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 2-5 cm of snow expected with 30% chance of some snow and a moderate breeze of 21 kph from the north-west.

  • 3°C maximum temperature3
    °C maximum temperature
  • -3°C minimum temperature-3
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 30% chance of some snow30
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -2°C wind chill-2
    °C wind chill
  • Moderate breeze of 21 kph from the North-West21
    kph wind from NW

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Thunder Bay weather for Friday 4th April 2025

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 5°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-west.

  • 5°C maximum temperature5
    °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 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 1°C wind chill1
    °C wind chill
  • Gentle breeze of 14 kph from the South-West14
    kph wind from SW

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

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