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.

  • Tuesday
    27th Oct
    Mostly cloudy with rain (5-10 mm of rainfall expected)
  • Wednesday
    28th Oct
    Sunshine and showers (2-5 mm of rainfall expected)
  • Thursday
    29th Oct
    Mostly cloudy with light rain (2-5 mm of rainfall expected)
  • Friday
    30th Oct
    Broken clouds
  • Saturday
    31st Oct
    Sunshine and showers (0-2 mm of rainfall expected)

5-day weather forecast updated at 04:00 on Tuesday 27th October 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 Tuesday 27th October 2026

Expect mostly cloudy with rain in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 100% chance of some rain and a gentle breeze of 17 kph from the south-east.

  • 7°C maximum temperature7
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 100% chance of some rain100
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • 4°C wind chill4
    °C wind chill
  • Gentle breeze of 17 kph from the South-East17
    kph wind from SE

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Thunder Bay weather for Wednesday 28th October 2026

Expect sunshine and showers in Thunder Bay, Ontario with a maximum temperature of 18°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 70% chance of some rain and a light breeze of 11 kph from the south-west.

  • 18°C maximum temperature18
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 70% chance of some rain70
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 18°C wind chill18
    °C wind chill
  • Light breeze of 11 kph from the South-West11
    kph wind from SW

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Thunder Bay weather for Thursday 29th October 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 12°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 21% chance of some rain and a gentle breeze of 18 kph from the west.

  • 12°C maximum temperature12
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 21% chance of some rain21
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Gentle breeze of 18 kph from the West18
    kph wind from W

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Thunder Bay weather for Friday 30th October 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 11°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the west.

  • 11°C maximum temperature11
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 11°C wind chill11
    °C wind chill
  • Light breeze of 10 kph from the West10
    kph wind from W

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Thunder Bay weather for Saturday 31st October 2026

Expect sunshine and showers in Thunder Bay, Ontario with a maximum temperature of 10°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a light breeze of 10 kph from the south-east.

  • 10°C maximum temperature10
    °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 2 (Low)2
    UV index (Low)
  • 25% chance of some rain25
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 10 kph from the South-East10
    kph wind from SE

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