Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 9°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

  • Friday
    24th Apr
    Isolated thunderstorms (10-20 mm of rainfall expected)
  • Saturday
    25th Apr
    Broken clouds
  • Sunday
    26th Apr
    Overcast skies
  • Monday
    27th Apr
    Mostly cloudy with rain (10-20 mm of rainfall expected)
  • Tuesday
    28th Apr
    Sunshine and showers (10-20 mm of rainfall expected)

5-day weather forecast updated at 04:00 on Friday 24th 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 Friday 24th April 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 9°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 98% chance of some rain and a moderate breeze of 23 kph from the east.

  • 9°C maximum temperature9
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 98% chance of some rain98
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 5°C wind chill5
    °C wind chill
  • Moderate breeze of 23 kph from the East23
    kph wind from E

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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 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.

  • 13°C maximum temperature13
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 10 kph from the North-West10
    kph wind from NW

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Thunder Bay weather for Sunday 26th April 2026

Expect overcast skies in Thunder Bay, Ontario with a maximum temperature of 10°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the east.

  • 10°C maximum temperature10
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 10 kph from the East10
    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 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 85% chance of some rain and a moderate breeze of 22 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
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 85% chance of some rain85
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 5°C wind chill5
    °C wind chill
  • Moderate breeze of 22 kph from the East22
    kph wind from E

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Thunder Bay weather for Tuesday 28th April 2026

Expect sunshine and showers in Thunder Bay, Ontario with a maximum temperature of 10°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 10-20 mm of rainfall expected with 74% 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
  • Sunshine and showers
    sunshine and showers
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 74% chance of some rain74
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 7°C wind chill7
    °C wind chill
  • Moderate breeze of 26 kph from the North-West26
    kph wind from NW

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