Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 4°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

  • Thursday
    9th Apr
    Mostly cloudy with light snow (0-2 cm of snow expected)
  • Friday
    10th Apr
    Scattered clouds
  • Saturday
    11th Apr
    Broken clouds
  • Sunday
    12th Apr
    Isolated thunderstorms (10-20 mm of rainfall expected)
  • Monday
    13th Apr
    Isolated thunderstorms (2-5 mm of rainfall expected)

5-day weather forecast updated at 04:00 on Thursday 9th 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 Thursday 9th April 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of 4°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 3% chance of some snow and a moderate breeze of 21 kph from the west.

  • 4°C maximum temperature4
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 3% chance of some snow3
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 0°C wind chill0
    °C wind chill
  • Moderate breeze of 21 kph from the West21
    kph wind from W

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Thunder Bay weather for Friday 10th April 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 6°C, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the west.

  • 6°C maximum temperature6
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 3°C wind chill3
    °C wind chill
  • Light breeze of 12 kph from the West12
    kph wind from W

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Thunder Bay weather for Saturday 11th April 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 7°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

  • 7°C maximum temperature7
    °C maximum temperature
  • -5°C minimum temperature-5
    °C 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
  • 5°C wind chill5
    °C wind chill
  • Light breeze of 11 kph from the South11
    kph wind from S

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Thunder Bay weather for Sunday 12th April 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 6°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 86% chance of some rain and a light breeze of 12 kph from the south-east.

  • 6°C maximum temperature6
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 86% chance of some rain86
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 4°C wind chill4
    °C wind chill
  • Light breeze of 12 kph from the South-East12
    kph wind from SE

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Thunder Bay weather for Monday 13th April 2026

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 8°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 52% chance of some rain and a gentle breeze of 14 kph from the north-east.

  • 8°C maximum temperature8
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 52% chance of some rain52
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 6°C wind chill6
    °C wind chill
  • Gentle breeze of 14 kph from the North-East14
    kph wind from NE

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