Thunder Bay weather live forecast

Tomorrow's maximum temperature in Thunder Bay is expected to be 55°F.

5-day weather forecast updated at 04:00 on Saturday 24th May 2025 GMT

More about Thunder Bay

Thunder Bay by month

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

Recommended for Ontario

Virgin Holidays: Latest offers on 2025 holidays

  • Book online & save on long haul holidays in 2025
  • Destinations include New York, Caribbean & beyond
  • Ideal for summer, winter & half term family holidays
Go to Virgin Holidays deal >>

View all Virgin Holidays 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 Saturday 24th May 2025

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 55°F, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 40% chance of some rain and a light breeze of 5 mph from the north.

  • 55°F maximum temperature55
    °F maximum temperature
  • 39°F minimum temperature39
    °F minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 40% chance of some rain40
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 55°F wind chill55
    °F wind chill
  • Light breeze of 5 mph from the North5
    mph wind from N

Back to top

Thunder Bay weather for Sunday 25th May 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 61°F, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the north-west.

  • 61°F maximum temperature61
    °F maximum temperature
  • 41°F minimum temperature41
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 61°F wind chill61
    °F wind chill
  • Light breeze of 5 mph from the North-West5
    mph wind from NW

Back to top

Thunder Bay weather for Monday 26th May 2025

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 63°F, maximum UV of 6 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the south-east.

  • 63°F maximum temperature63
    °F maximum temperature
  • 41°F minimum temperature41
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 14 hours of bright sunshine14
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 63°F wind chill63
    °F wind chill
  • Light breeze of 7 mph from the South-East7
    mph wind from SE

Back to top

Thunder Bay weather for Tuesday 27th May 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 63°F, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south-east.

  • 63°F maximum temperature63
    °F maximum temperature
  • 41°F minimum temperature41
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 63°F wind chill63
    °F wind chill
  • Light breeze of 6 mph from the South-East6
    mph wind from SE

Back to top

Thunder Bay weather for Wednesday 28th May 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 63°F, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the south-east.

  • 63°F maximum temperature63
    °F maximum temperature
  • 45°F minimum temperature45
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 5 mph from the South-East5
    mph wind from SE

Back to top

Avalon Waterways: Current offers on 2025 river cruises

  • Save on river cruises in 2025 with Avalon Waterways
  • Book river cruises in Europe, Asia, Africa & Americas
  • Filter deals by promotion, month, destination & more
Go to Avalon Waterways deal >>

Expires at 23:59 on Wednesday 31st Dec 2025 · View all Avalon Waterways offers

Metric (°C)  |  Imperial (°F)

Back to top

More about Ontario

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^