January 18, 2026: Thunder Bay’s Detailed Weather Forecast — Light Snow Today, Blowing Snow Tonight, Frostbite Risk Continues

Thunder Bay – WEATHER Desk – Thunder Bay remains in a mid-winter cold pattern today, with light snow in the morning and more periods of light snowdeveloping later this afternoon. The bigger impact arrives tonight as winds strengthen out of the northwest, creating local blowing snow, lowering visibility at times, and driving wind chills toward -32.

Today’s Weather Overview

Current Conditions (Thunder Bay Airport – 8:00 AM EST)

Thunder Bay is starting the day with a steady, cold snowfall and decent visibility for now—but pressure is falling, signalling the unsettled pattern isn’t done yet.

• Temperature: -18.0°C

• Condition: Light Snow

• Wind: NE 5 km/h

• Wind Chill: -22

• Humidity: 79%

• Pressure: 101.4 kPa (falling)

• Visibility: 13 km

Today (Sunday, Jan 18)

• Mainly cloudy with periods of light snow beginning this afternoon

• Wind becomes NW 20 km/h this afternoon

• High: -12°C

• Wind chill near -24

Extended Weather Forecast

Expected Conditions (Next Three Days)

Tonight (Sunday night)

• Periods of light snow ending after midnight, then cloudy

• Local blowing snow develops

• Wind NW 30 km/h gusting to 50

• Low: -21°C

• Wind chill -32 overnight

• Risk of frostbite

Monday (Jan 19)

• A mix of sun and cloud

• NW wind 20 km/h early, becoming light later

• Temperature steady near -21°C

• Wind chill near -32

• Risk of frostbite

• Monday night: Cloudy periods, low -26°C

Tuesday (Jan 20)

• A mix of sun and cloud

• High: -16°C

• Tuesday night: Cloudy, low -22°C

Wardrobe Recommendations

• Today: Dress for wind chill in the mid -20s—a winter parka, insulated mitts, toque, and a scarf/neck warmer.

• Tonight: Add face protection and windproof layers. With gusts up to 50 km/h and wind chills near -32, exposed skin can get into trouble quickly.

• Driving/commuting: Keep extra gloves and a warm layer in the vehicle, and watch for visibility drops tonight in open areas due to local blowing snow.

Weather Trivia

Thunder Bay often sees local blowing snow even when snowfall totals are light. When northwest winds ramp up, loose snow can lift off the ground and reduce visibility quickly—especially on exposed roadways outside the city and along higher terrain.

Weather Summary

Thunder Bay weather forecast for January 18, 2026: Light snow today with a high near -12°C. Winds increase tonight with local blowing snow, reduced visibility, and wind chills near -32 with frostbite risk. Cold continues Monday and Tuesday.