Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 10°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

  • Tuesday
    21st Oct
    Cloudy with some rain (10-20 mm of rainfall expected)
  • Wednesday
    22nd Oct
    Mostly cloudy with light rain (2-5 mm of rainfall expected)
  • Thursday
    23rd Oct
    Cloudy with sleet or snow (0-2 mm of rainfall expected)
  • Friday
    24th Oct
    Broken clouds
  • Saturday
    25th Oct
    Broken clouds

5-day weather forecast updated at 04:00 on Tuesday 21st October 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 Tuesday 21st October 2025

Expect cloudy with some rain in Thunder Bay, Ontario with a maximum temperature of 10°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 100% chance of some rain and a moderate breeze of 23 kph from the north-east.

  • 10°C maximum temperature10
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Cloudy with some rain
    cloudy with some rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 100% chance of some rain100
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 6°C wind chill6
    °C wind chill
  • Moderate breeze of 23 kph from the North-East23
    kph wind from NE

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Thunder Bay weather for Wednesday 22nd October 2025

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 7°C and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 49% chance of some rain and a moderate breeze of 20 kph from the north.

  • 7°C maximum temperature7
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 49% chance of some rain49
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 4°C wind chill4
    °C wind chill
  • Moderate breeze of 20 kph from the North20
    kph wind from N

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Thunder Bay weather for Thursday 23rd October 2025

Expect cloudy with sleet or snow in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 mm of sleet/snow expected with 11% chance of some sleet or snow and a gentle breeze of 18 kph from the north-west.

  • 7°C maximum temperature7
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 11% chance of some sleet or snow11
    % chance of some sleet or snow
  • 0-2 mm of sleet/snow expected<2
    mm of sleet/snow expected
  • 3°C wind chill3
    °C wind chill
  • Gentle breeze of 18 kph from the North-West18
    kph wind from NW

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Thunder Bay weather for Friday 24th October 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north-west.

  • 7°C maximum temperature7
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 5°C wind chill5
    °C wind chill
  • Light breeze of 12 kph from the North-West12
    kph wind from NW

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Thunder Bay weather for Saturday 25th October 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 10°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-east.

  • 10°C maximum temperature10
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 8°C wind chill8
    °C wind chill
  • Gentle breeze of 14 kph from the South-East14
    kph wind from SE

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

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