Thunder Bay weather live forecast

Tomorrow's maximum temperature in Thunder Bay is expected to be 23°C.

  • Sunday
    19th May
    Scattered clouds
  • Monday
    20th May
    Mostly cloudy with rain (5-10 mm of rainfall expected)
  • Tuesday
    21st May
    Mostly cloudy with light rain (0-2 mm of rainfall expected)
  • Wednesday
    22nd May
    Cloudy with some rain (50 mm or more rainfall expected)
  • Thursday
    23rd May
    Mostly cloudy with light rain (2-5 mm of rainfall expected)

5-day weather forecast updated at 04:00 on Monday 20th May 2024 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 Sunday 19th May 2024

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 23°C, maximum UV of 6 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 35 kph from the west.

  • 23°C maximum temperature23
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 13 hours of bright sunshine13
    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
  • Fresh breeze of 35 kph from the West35
    kph wind from W

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Thunder Bay weather for Monday 20th May 2024

Expect mostly cloudy with rain in Thunder Bay, Ontario with a maximum temperature of 15°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 51% chance of some rain and a light breeze of 10 kph from the east.

  • 15°C maximum temperature15
    °C maximum temperature
  • 10°C minimum temperature10
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 51% chance of some rain51
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • 15°C wind chill15
    °C wind chill
  • Light breeze of 10 kph from the East10
    kph wind from E

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Thunder Bay weather for Tuesday 21st May 2024

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 16°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 90% chance of some rain and a moderate breeze of 25 kph from the north-east.

  • 16°C maximum temperature16
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 90% chance of some rain90
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 25 kph from the North-East25
    kph wind from NE

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Thunder Bay weather for Wednesday 22nd May 2024

Expect cloudy with some rain in Thunder Bay, Ontario with a maximum temperature of 12°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 50 mm or more of rainfall expected with 92% chance of some rain and a fresh breeze of 33 kph from the north-east.

  • 12°C maximum temperature12
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Cloudy with some rain
    cloudy with some rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 92% chance of some rain92
    % chance of some rain
  • 50 mm or more of rainfall expected>50
    mm or more of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Fresh breeze of 33 kph from the North-East33
    kph wind from NE

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Thunder Bay weather for Thursday 23rd May 2024

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 25% chance of some rain and a moderate breeze of 25 kph from the north-west.

  • 12°C maximum temperature12
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 25% chance of some rain25
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 25 kph from the North-West25
    kph wind from NW

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  • Find lowest fares on flights to Canada, USA & beyond
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Metric (°C / mm)  |  Imperial (°F / inches)

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