Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 14°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

  • Tuesday
    20th Oct
    Scattered clouds
  • Wednesday
    21st Oct
    Broken clouds
  • Thursday
    22nd Oct
    Scattered clouds
  • Friday
    23rd Oct
    Broken clouds
  • Saturday
    24th Oct
    Mostly cloudy with light rain (0-2 mm of rainfall expected)

5-day weather forecast updated at 04:00 on Tuesday 20th October 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 Tuesday 20th October 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 14°C, maximum UV of 2 (Low) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south-east.

  • 14°C maximum temperature14
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 14°C wind chill14
    °C wind chill
  • Light breeze of 11 kph from the South-East11
    kph wind from SE

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Thunder Bay weather for Wednesday 21st October 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 16°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north.

  • 16°C maximum temperature16
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 10 kph from the North10
    kph wind from N

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Thunder Bay weather for Thursday 22nd October 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 14°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the south-east.

  • 14°C maximum temperature14
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 14°C wind chill14
    °C wind chill
  • Light breeze of 9 kph from the South-East9
    kph wind from SE

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Thunder Bay weather for Friday 23rd October 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 16°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the south-east.

  • 16°C maximum temperature16
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 16°C wind chill16
    °C wind chill
  • Light breeze of 9 kph from the South-East9
    kph wind from SE

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Thunder Bay weather for Saturday 24th October 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 17°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 30% chance of some rain and a gentle breeze of 17 kph from the south.

  • 17°C maximum temperature17
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 30% chance of some rain30
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 17 kph from the South17
    kph wind from S

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