Thunder Bay – WEATHER DESK – Thunder Bay is starting Sunday in a deep freeze, with -14°C at the airport and a wind chill near -21 under mostly cloudy skies. Conditions improve a bit this afternoon as temperatures climb toward -4°C, but winter isn’t done yet: snow develops tonight (2–4 cm) and there’s a risk of freezing drizzle overnight that could create slick spots.

Today’s Weather Overview

Current Conditions (9:00 AM EST — Thunder Bay Airport)

• Temperature: -14.1°C

• Condition: Mostly Cloudy

• Wind: WSW 12 km/h

• Wind Chill: -21

• Humidity: 86%

• Pressure: 102.4 kPa and rising

• Visibility: 32 km

Heads-up: Environment Canada’s hourly page indicates no alerts in effect this morning, but roads can still turn slick later with snow and possible freezing drizzle.

Sunday Overview

• Mainly cloudy with a 60% chance of flurries late this afternoon

• Wind becomes southwest 20 km/h near noon

• High: -4°C

• Wind chill improves from around -20 this morning to about -8 this afternoon

• UV index: 1 (low)

Extended Weather Forecast

Expected Conditions (Next Three Days)

Tonight (Sun, Jan 11)

• Periods of snow ending near midnight, then cloudy with a chance of flurries

• Snow amount: 2–4 cm

• Risk of freezing drizzle overnight

• Temperature steady near -3°C

Monday (Jan 12)

• Cloudy with 40% chance of flurries in the morning

• Risk of freezing drizzle early

• High +1°C (a noticeable warm-up)

Monday Night into Tuesday (Jan 13)

• Monday night: Cloudy with 60% chance of snow, low -3°C

• Tuesday: Cloudy with 60% chance of snow, high 0°C

• Tuesday night: Colder air returns, low -19°C

Wardrobe Recommendations

• This morning: Dress for -20 wind chill—parka, insulated mitts, toque, and a scarf/neck warmer.

• This afternoon: Keep layers you can shed as it “warms” toward -4°C, but stay windproof.

• Tonight into Monday morning: With freezing drizzle risk, wear boots with strong grip (and use traction aids if you have them). Expect slippery sidewalks and parking lots.

Weather Trivia

Thunder Bay’s seasonal normals for this time of year are about -9°C (daytime high) and -20°C (overnight low)—so today’s -14°C start is very “on brand” for mid-January.

Weather Focus

Thunder Bay weather for Sunday, January 11, 2026: Mostly cloudy and -14°C this morning with wind chill near -21. Flurries possible late today, then snow tonight (2–4 cm) with a risk of freezing drizzle. Warmer Monday near +1°C.