Thunder Bay – Weather – Thunder Bay is starting Thursday with light snow and reduced visibility, and the bigger theme through the next 24–36 hours is mixed winter precipitation.
There is a light dusting of fresh snow out there right now, that is likely to make streets and sidewalks slippery.
Today brings a 60% chance of snow or freezing drizzle, and by Friday the forecast turns tricky with freezing drizzle early, then periods of rain, and even a risk of freezing rain as temperatures hover near the freezing mark.
Current Conditions (Observed 7:00 AM EST, Thursday March 5, 2026)
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Condition: Light snow
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Temperature: -13.2°C (headline: -13°C)
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Wind: N 6 km/h
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Wind Chill: -17
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Pressure: 102.7 kPa, rising
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Humidity: 88%
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Dew Point: -14.8°C
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Visibility: 8 km
Today (Thursday)
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Sky: Cloudy
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Precipitation: 60% chance of snow or freezing drizzle
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Wind: East 20 km/h
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High: -5°C
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Wind chill: -22 this morning, improving to -13 this afternoon
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UV Index: 1 (Low)
Expected Conditions (Next Three Days)
Tonight (Thursday Night)
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Sky: Cloudy
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Precipitation: 30% chance of snow with risk of freezing drizzle
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Fog: Fog patches developing overnight
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Wind: NE 20 km/h becoming light early this evening
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Low: -6°C
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Wind chill: Near -13 this evening
Friday, March 6
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Sky: Cloudy
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Morning/Early afternoon: 70% chance of freezing drizzle
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Afternoon: Periods of rain beginning
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Main risk: Freezing rain risk in the afternoon (watch for rapid icing if surfaces stay cold)
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Wind: Up to 15 km/h
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High: +2°C
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Wind chill: Near -4 in the morning
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Friday Night: Cloudy with 60% chance of flurries or rain showers, low -6°C
Saturday, March 7
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Day: Sunny / mix of sun and cloud
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High: +3°C
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Night: Clear, low -3°C
Wardrobe Recommendations
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This morning: Dress for -13°C and a -17 wind chill—winter coat, warm hat, insulated gloves/mitts, and a neck warmer.
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Today’s freezing drizzle chance: Wear boots with strong traction. Sidewalks and parking lots can glaze over quickly even if precipitation looks light.
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Friday’s mixed bag (freezing drizzle → rain, freezing rain risk): Waterproof outerwear is smart, but keep winter layers underneath. Bring footwear that can handle slush + ice, and plan extra time for travel.
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Saturday: A milder feel in the sun—layers still matter, especially with refreeze after sunset.
Weather Trivia
Freezing drizzle and freezing rain are different headaches. Freezing drizzle is made of tiny droplets that create a thin, slick glaze. Freezing rain has larger drops and can build ice faster on power lines and trees—often causing more damage, even if it doesn’t last long.
Summary
Thunder Bay weather forecast for Thursday, March 5, 2026: light snow and -13°C this morning with visibility reduced to 8 km. A 60% chance of snow or freezing drizzle today with an east wind and high -5°C. Tonight remains cloudy with snow and freezing drizzle risk. Friday turns messy with freezing drizzle, then rain, and a risk of freezing rain as temperatures rise to +2°C.
