Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 13°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

  • Saturday
    25th Apr
    Broken clouds
  • Sunday
    26th Apr
    Mostly cloudy with light rain (0-2 mm of rainfall expected)
  • Monday
    27th Apr
    Mostly cloudy with rain (10-20 mm of rainfall expected)
  • Tuesday
    28th Apr
    Mostly cloudy with rain (10-20 mm of rainfall expected)
  • Wednesday
    29th Apr
    Broken clouds

5-day weather forecast updated at 04:00 on Saturday 25th April 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 Saturday 25th April 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 13°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

  • 13°C maximum temperature13
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

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Thunder Bay weather for Sunday 26th April 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 8°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 52% chance of some rain and a light breeze of 9 kph from the east.

  • 8°C maximum temperature8
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 52% chance of some rain52
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 6°C wind chill6
    °C wind chill
  • Light breeze of 9 kph from the East9
    kph wind from E

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Thunder Bay weather for Monday 27th April 2026

Expect mostly cloudy with rain in Thunder Bay, Ontario with a maximum temperature of 9°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 99% chance of some rain and a moderate breeze of 20 kph from the east.

  • 9°C maximum temperature9
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 99% chance of some rain99
    % 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 20 kph from the East20
    kph wind from E

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Thunder Bay weather for Tuesday 28th April 2026

Expect mostly cloudy with rain in Thunder Bay, Ontario with a maximum temperature of 10°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 75% chance of some rain and a moderate breeze of 26 kph from the north-west.

  • 10°C maximum temperature10
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 75% chance of some rain75
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 26 kph from the North-West26
    kph wind from NW

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Thunder Bay weather for Wednesday 29th April 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 9°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

  • 9°C maximum temperature9
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 7°C wind chill7
    °C wind chill
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

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