Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -11°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 Tuesday 30th December 2025 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 Monday 29th December 2025

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -11°C, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0-2 cm of snow expected with 5% chance of some snow and a fresh breeze of 29 kph from the north-west.

  • -11°C maximum temperature-11
    °C maximum temperature
  • -19°C minimum temperature-19
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 5% chance of some snow5
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -21°C wind chill-21
    °C wind chill
  • Fresh breeze of 29 kph from the North-West29
    kph wind from NW

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Thunder Bay weather for Tuesday 30th December 2025

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -12°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 18 kph from the north-west.

  • -12°C maximum temperature-12
    °C maximum temperature
  • -19°C minimum temperature-19
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -21°C wind chill-21
    °C wind chill
  • Gentle breeze of 18 kph from the North-West18
    kph wind from NW

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Thunder Bay weather for Wednesday 31st December 2025

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of -16°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 24 kph from the north-west.

  • -16°C maximum temperature-16
    °C maximum temperature
  • -21°C minimum temperature-21
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -26°C wind chill-26
    °C wind chill
  • Moderate breeze of 24 kph from the North-West24
    kph wind from NW

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Thunder Bay weather for Thursday 1st January 2026

Expect clear skies in Thunder Bay, Ontario with a maximum temperature of -16°C, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 24 kph from the west.

  • -16°C maximum temperature-16
    °C maximum temperature
  • -22°C minimum temperature-22
    °C minimum temperature
  • Clear skies
    clear skies
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -26°C wind chill-26
    °C wind chill
  • Moderate breeze of 24 kph from the West24
    kph wind from W

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Thunder Bay weather for Friday 2nd January 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of -15°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 19 kph from the north-west.

  • -15°C maximum temperature-15
    °C maximum temperature
  • -19°C minimum temperature-19
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -24°C wind chill-24
    °C wind chill
  • Gentle breeze of 19 kph from the North-West19
    kph wind from NW

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