Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 6°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

• Tuesday
  5th May
  6
  -1
  
  3
  3
• Wednesday
  6th May
  7
  -2
  
  2
  2
• Thursday
  7th May
  8
  -1
  
  1
  2
• Friday
  8th May
  12
  -2
  
  8
  4
• Saturday
  9th May
  12
  -1
  
  2
  2

5-day weather forecast updated at 04:00 on Tuesday 5th May 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 Tuesday 5th May 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 6°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the west.

• 6
  °C maximum temperature
• -1
  °C minimum temperature
• 
  broken clouds
• 3
  hours of sunshine
• 3
  UV index (Moderate)
• 0
  mm of rainfall expected
• 2
  °C wind chill
• 24
  kph wind from W

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Thunder Bay weather for Wednesday 6th May 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

• 7
  °C maximum temperature
• -2
  °C minimum temperature
• 
  broken clouds
• 2
  hours of sunshine
• 2
  UV index (Low)
• 0
  mm of rainfall expected
• 5
  °C wind chill
• 16
  kph wind from NW

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Thunder Bay weather for Thursday 7th May 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 8°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the west.

• 8
  °C maximum temperature
• -1
  °C minimum temperature
• 
  broken clouds
• 1
  hour of sunshine
• 2
  UV index (Low)
• 0
  mm of rainfall expected
• 5
  °C wind chill
• 14
  kph wind from W

Back to top

Thunder Bay weather for Friday 8th May 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 12°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the west.

• 12
  °C maximum temperature
• -2
  °C minimum temperature
• 
  scattered clouds
• 8
  hours of sunshine
• 4
  UV index (Moderate)
• 0
  mm of rainfall expected
• 12
  °C wind chill
• 16
  kph wind from W

Back to top

Thunder Bay weather for Saturday 9th May 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 12°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.

• 12
  °C maximum temperature
• -1
  °C minimum temperature
• 
  broken clouds
• 2
  hours of sunshine
• 2
  UV index (Low)
• 0
  mm of rainfall expected
• 12
  °C wind chill
• 14
  kph wind from NW

Back to top

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Sale

• Discover top Air Canada offers on flights to Canada
• Browse lowest fares available or search by date
• Book flights to Toronto, Vancouver, Calgary, Montreal & more

Go to Air Canada deal >>

View all Air Canada offers

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