Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 19°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 Friday 2nd October 2026 GMT

More about Thunder Bay

Thunder Bay by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ontario

Air Canada: Top flight deals to Canada

  • 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

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 1st October 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the north-west.

  • 19°C maximum temperature19
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    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
  • Moderate breeze of 22 kph from the North-West22
    kph wind from NW

Back to top

Thunder Bay weather for Friday 2nd October 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 15°C, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the west.

  • 15°C maximum temperature15
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Scattered clouds
    scattered 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
  • Moderate breeze of 20 kph from the West20
    kph wind from W

Back to top

Thunder Bay weather for Saturday 3rd October 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 14°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 69% chance of some rain and a gentle breeze of 17 kph from the south.

  • 14°C maximum temperature14
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 69% chance of some rain69
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 14°C wind chill14
    °C wind chill
  • Gentle breeze of 17 kph from the South17
    kph wind from S

Back to top

Thunder Bay weather for Sunday 4th October 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 26 kph from the north-west.

  • 16°C maximum temperature16
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    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 26 kph from the North-West26
    kph wind from NW

Back to top

Thunder Bay weather for Monday 5th October 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 15°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the north-west.

  • 15°C maximum temperature15
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    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
  • Gentle breeze of 15 kph from the North-West15
    kph wind from NW

Back to top

Air Canada: Top flight deals to Canada

  • 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

More about Ontario

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^