Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 24°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 Sunday 26th July 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 Monday 27th July 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 24°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 49% chance of some rain and a light breeze of 12 kph from the east.

  • 24°C maximum temperature24
    °C maximum temperature
  • 12°C minimum temperature12
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 49% chance of some rain49
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 24°C wind chill24
    °C wind chill
  • Light breeze of 12 kph from the East12
    kph wind from E

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Thunder Bay weather for Tuesday 28th July 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-east.

  • 25°C maximum temperature25
    °C maximum temperature
  • 14°C minimum temperature14
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 25°C wind chill25
    °C wind chill
  • Light breeze of 10 kph from the South-East10
    kph wind from SE

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Thunder Bay weather for Wednesday 29th July 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

  • 25°C maximum temperature25
    °C maximum temperature
  • 14°C minimum temperature14
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 12 kph from the South-East12
    kph wind from SE

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Thunder Bay weather for Thursday 30th July 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

  • 27°C maximum temperature27
    °C maximum temperature
  • 15°C minimum temperature15
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 12 kph from the South-East12
    kph wind from SE

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Thunder Bay weather for Friday 31st July 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 45% chance of some rain and a light breeze of 11 kph from the south.

  • 29°C maximum temperature29
    °C maximum temperature
  • 16°C minimum temperature16
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 45% chance of some rain45
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 11 kph from the South11
    kph wind from S

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