Thunder Bay – WEATHER – Thunder Bay is starting Tuesday under clear skies, but that won’t last long. Clouds thicken this morning, bringing a 60% chance of flurries and a risk of freezing drizzle—a combination that can create slick sidewalks and surprise icy patches on roads. The barametric pressure is falling, signalling an active pattern as we head through midweek.

Today’s Weather Overview

Current Conditions (Observed 6:00 AM EST, Tuesday March 3, 2026)

Early this morning in Thunder Bay:

• Condition: Clear

• Temperature: -10.6°C (headline: -11°C)

• Wind: W 5 km/h

• Wind Chill: -14

• Pressure: 102.0 kPa, falling

• Humidity: 90%

• Dew Point: -11.9°C

• Visibility: 24 km

With humidity high and the dew point close to the air temperature, it doesn’t take much for low cloud, fog, or drizzle to develop—especially as clouds roll in.

Today (Tuesday)

• Sky: Becoming cloudy this morning

• Precipitation: 60% chance of flurries

• Main risk: Freezing drizzle this morning (watch for icy surfaces)

• Wind: Up to 15 km/h

• High: 0°C

• Wind Chill: Near -13 this morning

• UV Index: 2 (Low)

Expected Conditions (Next Three Days)

Tonight (Tuesday Night)

• Sky: Cloudy

• Flurries: 30% chance early this evening

• Fog: Fog patches developing overnight

• Wind: Up to 15 km/h

• Low: -9°C

• Wind Chill: Around -3 this evening, near -11 overnight

Wednesday, March 4

• Sky: Cloudy

• Flurries: 40% chance

• Main risk: Freezing drizzle risk in the morning and early afternoon

• Fog: Morning fog patches dissipating

• Wind: Up to 15 km/h

• High: -1°C

• Wind Chill: Near -12 in the morning, about -3 in the afternoon

• Night: Cloudy, low -7°C

Thursday, March 5

• Day: 30% chance of flurries, high -1°C

• Night: Cloudy, low -4°C

Friday, March 6

• Day: 60% chance of flurries or rain showers, high +2°C

• Night: 40% chance of flurries, low -5°C

Wardrobe Recommendations

• This morning: Dress for -11°C with a -14 wind chill—winter coat, warm hat, gloves or mitts, and a neck warmer.

• Freezing drizzle risk: Wear boots with good traction. If you’re driving, give yourself extra braking distance and be cautious on bridges and untreated side streets.

• This afternoon: Temps near 0°C can feel damp and chilly—layers work best.

• Tonight: With fog patches and temps dropping to -9°C, be ready for re-freeze and slick spots again by morning.

Weather Trivia

Freezing drizzle forms when supercooled liquid droplets fall through air that’s below 0°C and freeze on contact. It often happens in “in-between” weather—right around the freezing mark—when there isn’t enough ice in the clouds to produce steady snow.