Thunder Bay – Weather Desk – Thunder Bay is starting the day under cloudy skies with temperatures near -2°C, and many streets remain slushy and uncleared. Watch for slick intersections and slippery side roads this morning, especially where slush is turning to ice.

Environment Canada also notes a risk of freezing drizzle early today, which can quickly coat roads and sidewalks with a thin, hard-to-see glaze.

Today’s Weather Overview

Current Conditions (Thunder Bay Airport — 7:00 AM EST)

• Temperature: -2.2°C

• Condition: Cloudy

• Wind: WSW 15 km/h

• Wind Chill: -7

• Humidity: 86%

• Pressure: 101.0 kPa, falling

• Visibility: 24 km

What it feels like outside

It’s not brutally cold, but the wind chill and damp slush make it feel raw. With slushy roads and messy intersections, stopping distances will be longer and lane markings may be hidden in spots.

Today (Monday)

• Cloudy with a 40% chance of flurries this morning

• Risk of freezing drizzle this morning

• Clearing this afternoon

• Wind becomes W 20 km/h gusting to 40 this morning, then light late afternoon

• High: +2°C

• UV index: 1 (low)

Road note: That warming to +2°C may keep things wet and slushy through midday. If freezing drizzle occurs, expect very slick patches—especially on bridges, hills, and untreated sidewalks.

Extended Weather Forecast

Expected Conditions (Next Three Days)

Tonight (Mon, Jan 12)

• Increasing cloudiness early this evening

• Low: -4°C

• Wind up to 15 km/h

• Wind chill near -8 this evening

Tuesday (Jan 13)

• Cloudy with periods of light snow beginning early morning

• Snow mixing with drizzle in the afternoon

• Wind W 20 km/h in the morning, then N 30 gusting to 60 late afternoon

• High: +2°C

• Wind chill near -7 in the morning

Tuesday Night

• Cloudy periods with 40% chance of flurries

• Low: -16°C

Wednesday (Jan 14)

• Sunny

• High: -11°C

• Night: Clear, low -20°C

Wardrobe Recommendations

• This morning: Waterproof winter boots with grip are your best friend—slush + freezing drizzle risk is a bad combo. Add gloves, a toque, and a warm layer under a wind-resistant coat.

• This afternoon: As it clears and warms to +2°C, lighter layers work, but keep something windproof for gusts.

• Tuesday: Prepare for snow/drizzle mix—wear a waterproof outer layer and keep traction in mind.

• By Tuesday night/Wednesday: Switch back to full winter gear—temperatures plunge and wind chills will bite.

Weather Trivia

Freezing drizzle often forms when there’s warm air above and cold air near the surface. The droplets stay liquid until they hit something cold—like pavement—then freeze on contact, creating that “instant ice” effect that’s so dangerous for drivers and pedestrians.

Summary

Thunder Bay weather forecast for January 12, 2026: Slushy and slippery streets this morning with a risk of freezing drizzle and flurries. Clearing this afternoon with a high of +2°C. Light snow returns Tuesday with drizzle mixing in, followed by a sharp drop to -16°C Tuesday night.