THUNDER BAY – WEATHER – Thunder Bay is starting Sunday under partly cloudy skies, but cloud will thicken quickly and snow is expected later this morning into the afternoon.
The bigger headline in this outlook is the wind: northeasterly gusts build tonight, then Monday turns into a very windy and sharply colder-feeling day, with wind chills plunging toward -29 and a risk of frostbite.
Current Conditions (Observed 8:00 AM EDT, Sunday March 15, 2026)
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Temperature: -6.0°C
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Condition: Partly cloudy
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Wind: NNE 8 km/h
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Wind Chill: -10
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Pressure: 102.2 kPa, rising
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Humidity: 52%
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Dew Point: -14.2°C
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Visibility: 32 km
Today (Sunday)
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Sky: Becoming cloudy this morning
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Snow: 60% chance of snow late this morning and this afternoon
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Wind: Becoming NE 20 km/h gusting to 40 this afternoon
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High: -4°C
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Wind Chill: -17 this morning, near -10 this afternoon
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UV Index: 2 (Low)
Expected Conditions (Next Three Days)
Tonight (Sunday Night)
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Sky: Partly cloudy
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Wind: NE 30 km/h gusting to 50
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Low: -15°C
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Wind Chill: -13 this evening, dropping to -27 overnight
Monday, March 16
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Sky: Mainly sunny
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Wind: North 40 km/h gusting to 70 (very windy)
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High: -9°C
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Wind Chill: -29 in the morning, -18 in the afternoon
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Risk: Frostbite possible with prolonged exposure
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UV Index: 2 (Low)
Monday Night
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Sky: Cloudy periods
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Low: -20°C
Tuesday, March 17
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Sky: Sunny
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High: -8°C
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Night: Cloudy with 30% chance of flurries, low -15°C
Wardrobe Recommendations
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Today: Winter coat, hat, and gloves—especially once winds pick up this afternoon.
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Tonight: Dress for wind chill near -27. Add a neck warmer/balaclava and insulated mitts if you’ll be outside.
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Monday: This is a wind-driven cold day. Wear a windproof outer layer, warm mid-layer, insulated boots, and cover exposed skin. If you’re waiting for a bus or working outdoors, plan warm-up breaks.
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Driving tip: Gusty crosswinds Monday can make highways feel “pushy,” especially in open areas. Keep both hands on the wheel.
Weather Trivia
Thunder Bay can feel dramatically colder on windy days even if the thermometer doesn’t drop much. That’s wind chill at work—wind strips away the thin layer of warmth around your skin, speeding up heat loss and raising the risk of frostbite.
Weather Overview
Thunder Bay weather outlook for Sunday, March 15, 2026: partly cloudy and -6°C this morning, turning cloudy with a 60% chance of snow later today. Winds increase tonight with gusts to 50 km/h and wind chills near -27. Monday is mainly sunny but very windy with gusts to 70 km/h, a high of -9°C, and wind chills near -29 with frostbite risk.
