Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 25°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

5-day weather forecast updated at 04:00 on Thursday 11th June 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 Thursday 11th June 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 7 (High) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 33% chance of some rain and a moderate breeze of 22 kph from the south-west.

  • 25°C maximum temperature25
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 33% chance of some rain33
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 25°C wind chill25
    °C wind chill
  • Moderate breeze of 22 kph from the South-West22
    kph wind from SW

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Thunder Bay weather for Friday 12th June 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 20°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 41% chance of some rain and a moderate breeze of 23 kph from the west.

  • 20°C maximum temperature20
    °C maximum temperature
  • 12°C minimum temperature12
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 41% chance of some rain41
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 23 kph from the West23
    kph wind from W

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Thunder Bay weather for Saturday 13th June 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the west.

  • 18°C maximum temperature18
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 4 hours of bright sunshine4
    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
  • Moderate breeze of 23 kph from the West23
    kph wind from W

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Thunder Bay weather for Sunday 14th June 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 18°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the west.

  • 18°C maximum temperature18
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    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
  • Moderate breeze of 24 kph from the West24
    kph wind from W

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Thunder Bay weather for Monday 15th June 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 17°C, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the west.

  • 17°C maximum temperature17
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 17°C wind chill17
    °C wind chill
  • Gentle breeze of 18 kph from the West18
    kph wind from W

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