Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 13°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

  • Wednesday
    22nd Apr
    Sunshine and showers (0-2 mm of rainfall expected)
  • Thursday
    23rd Apr
    Isolated thunderstorms (5-10 mm of rainfall expected)
  • Friday
    24th Apr
    Isolated thunderstorms (20-30 mm of rainfall expected)
  • Saturday
    25th Apr
    Sunshine and showers (2-5 mm of rainfall expected)
  • Sunday
    26th Apr
    Broken clouds

5-day weather forecast updated at 04:00 on Wednesday 22nd April 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 22nd April 2026

Expect sunshine and showers in Thunder Bay, Ontario with a maximum temperature of 13°C, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 8% chance of some rain and a gentle breeze of 15 kph from the east.

  • 13°C maximum temperature13
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 8% chance of some rain8
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 13°C wind chill13
    °C wind chill
  • Gentle breeze of 15 kph from the East15
    kph wind from E

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Thunder Bay weather for Thursday 23rd April 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 64% chance of some rain and a moderate breeze of 22 kph from the east.

  • 7°C maximum temperature7
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 64% chance of some rain64
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • 3°C wind chill3
    °C wind chill
  • Moderate breeze of 22 kph from the East22
    kph wind from E

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Thunder Bay weather for Friday 24th April 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 20-30 mm of rainfall expected with 91% chance of some rain and a moderate breeze of 22 kph from the east.

  • 7°C maximum temperature7
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 91% chance of some rain91
    % chance of some rain
  • 20-30 mm of rainfall expected<30
    mm of rainfall expected
  • 3°C wind chill3
    °C wind chill
  • Moderate breeze of 22 kph from the East22
    kph wind from E

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Thunder Bay weather for Saturday 25th April 2026

Expect sunshine and showers in Thunder Bay, Ontario with a maximum temperature of 14°C, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 2-5 mm of rainfall expected with 28% chance of some rain and a gentle breeze of 15 kph from the north-west.

  • 14°C maximum temperature14
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 28% chance of some rain28
    % 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 15 kph from the North-West15
    kph wind from NW

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Thunder Bay weather for Sunday 26th April 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 11°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-east.

  • 11°C maximum temperature11
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 11°C wind chill11
    °C wind chill
  • Gentle breeze of 13 kph from the South-East13
    kph wind from SE

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