Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 30°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 Wednesday 15th July 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 Wednesday 15th July 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 30°C, low levels of heat & humidity, maximum UV of 7 (High) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.

  • 30°C maximum temperature30
    °C maximum temperature
  • 20°C minimum temperature20
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 14 kph from the North-West14
    kph wind from NW

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Thunder Bay weather for Thursday 16th July 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 26°C, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north-west.

  • 26°C maximum temperature26
    °C maximum temperature
  • 17°C minimum temperature17
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 12 kph from the North-West12
    kph wind from NW

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Thunder Bay weather for Friday 17th July 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 69% chance of some rain and a light breeze of 12 kph from the south-east.

  • 25°C maximum temperature25
    °C maximum temperature
  • 15°C minimum temperature15
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 69% chance of some rain69
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • 25°C wind chill25
    °C wind chill
  • Light breeze of 12 kph from the South-East12
    kph wind from SE

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Thunder Bay weather for Saturday 18th July 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 2-5 mm of rainfall expected with 45% chance of some rain and a light breeze of 11 kph from the north-east.

  • 28°C maximum temperature28
    °C maximum temperature
  • 14°C minimum temperature14
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 45% chance of some rain45
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 11 kph from the North-East11
    kph wind from NE

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Thunder Bay weather for Sunday 19th July 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south.

  • 25°C maximum temperature25
    °C maximum temperature
  • 15°C minimum temperature15
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    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
  • Gentle breeze of 15 kph from the South15
    kph wind from S

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