Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be -1°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 Sunday 22nd March 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 Sunday 22nd March 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 19 kph from the north.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -11°C minimum temperature-11
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 cm of snow expected0
    cm of snow expected
  • -7°C wind chill-7
    °C wind chill
  • Gentle breeze of 19 kph from the North19
    kph wind from N

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Thunder Bay weather for Monday 23rd March 2026

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0-2 cm of snow expected with 10% chance of some snow and a gentle breeze of 15 kph from the south.

  • 2°C maximum temperature2
    °C maximum temperature
  • -9°C minimum temperature-9
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 10% chance of some snow10
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -2°C wind chill-2
    °C wind chill
  • Gentle breeze of 15 kph from the South15
    kph wind from S

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Thunder Bay weather for Tuesday 24th March 2026

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of 2°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0-2 cm of snow expected with 21% chance of some snow and a light breeze of 12 kph from the north-west.

  • 2°C maximum temperature2
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 21% chance of some snow21
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • -2°C wind chill-2
    °C wind chill
  • Light breeze of 12 kph from the North-West12
    kph wind from NW

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Thunder Bay weather for Wednesday 25th March 2026

Expect mostly cloudy with light snow in Thunder Bay, Ontario with a maximum temperature of -4°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 cm of snow expected with 56% chance of some snow and a gentle breeze of 14 kph from the east.

  • -4°C maximum temperature-4
    °C maximum temperature
  • -10°C minimum temperature-10
    °C minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 56% chance of some snow56
    % chance of some snow
  • 2-5 cm of snow expected<5
    cm of snow expected
  • -9°C wind chill-9
    °C wind chill
  • Gentle breeze of 14 kph from the East14
    kph wind from E

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Thunder Bay weather for Thursday 26th March 2026

Expect clear skies with flurries of snow in Thunder Bay, Ontario with a maximum temperature of -1°C, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 5-10 cm of snow expected with 68% chance of some snow and a gentle breeze of 18 kph from the north.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -9°C minimum temperature-9
    °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 3 (Moderate)3
    UV index (Moderate)
  • 68% chance of some snow68
    % chance of some snow
  • 5-10 cm of snow expected<10
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Gentle breeze of 18 kph from the North18
    kph wind from N

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ALL sale: Top winter deals on North America hotels

  • Save on hotel stays in North America with Accor
  • ALL-Accor Live Limitless members get extra 10% off
  • Travel before 31st May 2026 (inclusive)
Go to ALL deal >>

Expires at 23:59 on Monday 30th Mar 2026 · View all ALL offers

Metric (°C / mm)  |  Imperial (°F / inches)

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