Thunder Bay – Weather – Thunder Bay starts Tuesday with light snow and reduced visibility, but the main story is the wind shift and incoming cold. Snow tapers off this morning, then a gusty wind builds through the day—turning north and gusting up to 60 km/hlate this afternoon. That sets the stage for a sharp drop tonight with clearing skies and wind chills near -23.

Walking and driving may present some challenges today. City Roads crews as of 7:00 am have not been on the roads, so major roads have a thin coating of snow, sidewalks in most places are bordering on impassible from the melting snow along with the fresh precipitation.

Today’s Weather Overview

Current Conditions (Thunder Bay Airport — 6:46 AM EST)

• Temperature: -1.2°C (Weather Focus: -1°C)

• Condition: Light snow

• Wind: Calm

• Humidity: 99%

• Pressure: 99.4 kPa, falling

• Visibility: 4 km

What to expect today (Tuesday)

• Periods of snow ending this morning, then cloudy with a 60% chance of flurries

• Wind becomes west 20 km/h gusting to 40 this morning

• Then north 30 km/h gusting to 60 late this afternoon

• High: +3°C

• Wind chill near -6 this morning

Heads-up: The afternoon wind shift can kick up loose snow in open areas and make it feel colder quickly later in the day.

Extended Weather Forecast

Expected Conditions (Next Three Days)

Tonight (Tue, Jan 13)

• Mainly cloudy with a 60% chance of flurries early this evening

• Clearing before morning

• Wind north 30 km/h gusting to 60

• Low: -15°C

• Wind chill: -10 this evening, dropping to around -23 overnight

Wednesday (Jan 14)

• Mix of sun and cloud

• Wind NW 20 km/h, becoming light early

• High: -11°C

• Wind chill: -23 in the morning, -18 in the afternoon

• Night: Clear, low -23°C

Thursday (Jan 15)

• Cloudy with 60% chance of snow

• High: -7°C

• Night: Periods of snow, low -9°C

Wardrobe Recommendations

• This morning: Waterproof boots and a warm mid-layer—light snow + damp air can chill fast.

• This afternoon: Add a windproof outer layer. Gusts late day will cut through lighter jackets.

• Tonight & Wednesday morning: Dress for serious cold—insulated coat, mitts, toque, and a scarf/neck warmer to protect skin as wind chills drop into the -20s.

Weather Trivia

When skies clear overnight, temperatures often fall faster because clouds aren’t there to trap heat near the ground. That’s why Thunder Bay can go from near-freezing daytime temps to deep cold overnight in the same 24-hour stretch.

Weather Summary

Thunder Bay weather forecast for January 13, 2026: Light snow this morning and a 60% chance of flurries today with highs near +3°C. Winds shift north late afternoon gusting to 60 km/h. Clearing tonight with a plunge to -15°C and wind chills near -23. Cold continues Wednesday.