Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 15°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

• Thursday
  4th Jun
  15
  10
  
  4
  5
• Friday
  5th Jun
  22
  8
  
  5
  5
• Saturday
  6th Jun
  23
  10
  
  11
  5
• Sunday
  7th Jun
  20
  8
  
  15
  7
• Monday
  8th Jun
  21
  6
  
  11
  5

5-day weather forecast updated at 04:00 on Friday 5th 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 4th June 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 15°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 65% chance of some rain and a light breeze of 12 kph from the east.

• 15
  °C maximum temperature
• 10
  °C minimum temperature
• 
  mostly cloudy with light rain
• 4
  hours of sunshine
• 5
  UV index (Moderate)
• 65
  % chance of some rain
• <5
  mm of rainfall expected
• 0
  no heat & humidity
• 12
  kph wind from E

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Thunder Bay weather for Friday 5th June 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 47% chance of some rain and a light breeze of 12 kph from the south-east.

• 22
  °C maximum temperature
• 8
  °C minimum temperature
• 
  isolated thunderstorms
• 5
  hours of sunshine
• 5
  UV index (Moderate)
• 47
  % chance of some rain
• <5
  mm of rainfall expected
• 0
  no heat & humidity
• 12
  kph wind from SE

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Thunder Bay weather for Saturday 6th June 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

• 23
  °C maximum temperature
• 10
  °C minimum temperature
• 
  scattered clouds
• 11
  hours of sunshine
• 5
  UV index (Moderate)
• 0
  mm of rainfall expected
• 23
  °C wind chill
• 11
  kph wind from NW

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Thunder Bay weather for Sunday 7th June 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 20°C, maximum UV of 7 (High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the east.

• 20
  °C maximum temperature
• 8
  °C minimum temperature
• 
  scattered clouds
• 15
  hours of sunshine
• 7
  UV index (High)
• 0
  mm of rainfall expected
• 20
  °C wind chill
• 14
  kph wind from E

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Thunder Bay weather for Monday 8th June 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the east.

• 21
  °C maximum temperature
• 6
  °C minimum temperature
• 
  scattered clouds
• 11
  hours of sunshine
• 5
  UV index (Moderate)
• 0
  mm of rainfall expected
• 21
  °C wind chill
• 15
  kph wind from E

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• Book early with Crystal Ski for the best deals
• Filter by promotional offers, duration, board basis & more

Go to Crystal Ski deal >>

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