Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 7°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

  • Wednesday
    29th Apr
    Mostly cloudy with light rain (0-2 mm of rainfall expected)
  • Thursday
    30th Apr
    Broken clouds
  • Friday
    1st May
    Scattered clouds
  • Saturday
    2nd May
    Broken clouds
  • Sunday
    3rd May
    Sunshine and showers (0-2 mm of rainfall expected)

5-day weather forecast updated at 04:00 on Wednesday 29th April 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

Canadian Affair: Latest special offers on holidays

  • Save on holidays to Canada with top deals & discounts
  • Book holidays, cruises, ski breaks & tours to Canada
  • Offers include discounts, upgrades & more
Go to Canadian Affair deal >>

View all Canadian Affair 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 Wednesday 29th April 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 47% chance of some rain and a light breeze of 11 kph from the north-west.

  • 7°C maximum temperature7
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 47% chance of some rain47
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 5°C wind chill5
    °C wind chill
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

Back to top

Thunder Bay weather for Thursday 30th April 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 5°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north.

  • 5°C maximum temperature5
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 3°C wind chill3
    °C wind chill
  • Gentle breeze of 13 kph from the North13
    kph wind from N

Back to top

Thunder Bay weather for Friday 1st May 2026

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

  • 8°C maximum temperature8
    °C maximum temperature
  • -2°C minimum temperature-2
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 6°C wind chill6
    °C wind chill
  • Light breeze of 12 kph from the North12
    kph wind from N

Back to top

Thunder Bay weather for Saturday 2nd May 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 10°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.

  • 10°C maximum temperature10
    °C maximum temperature
  • -2°C minimum temperature-2
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    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
  • Gentle breeze of 14 kph from the North-West14
    kph wind from NW

Back to top

Thunder Bay weather for Sunday 3rd May 2026

Expect sunshine and showers in Thunder Bay, Ontario with a maximum temperature of 11°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and a gentle breeze of 18 kph from the north-west.

  • 11°C maximum temperature11
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 21% chance of some rain21
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 18 kph from the North-West18
    kph wind from NW

Back to top

Canadian Affair: Latest special offers on holidays

  • Save on holidays to Canada with top deals & discounts
  • Book holidays, cruises, ski breaks & tours to Canada
  • Offers include discounts, upgrades & more
Go to Canadian Affair deal >>

View all Canadian Affair 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 ^