Thunder Bay – WEATHER DESK – A quieter-looking start to Monday in Thunder Bay is hiding a sharp twist later today.

Light snow is falling around the city this morning, but the bigger story is the temperature drop tonight—down into the mid-minus 20s. The barometer is rising, which often points to improving skies, but the wind will keep the day feeling colder than the thermometer suggests.

As of 6:00 am there is no evidence of COTB crews out plowing snow. The thin layer of snow on roads and sidewalks make for slippery conditions.

Today’s Weather Overview

Current Conditions

As of 6:36 AM EST, conditions at Thunder Bay Airport show a wintery, breezy morning:

• Light snow with a temperature of -8.1°C

• Northwest wind 17 km/h, gusting to 32 km/h

• Wind chill near -15

• Pressure 101.7 kPa and rising

• Visibility 16 km, humidity 72%

Even though the temperature isn’t extreme by Thunder Bay standards, the gusty northwest wind adds bite, especially for anyone commuting or waiting for transit.

Today

The forecast calls for mainly cloudy skies with a 40% chance of flurries this morning. Winds remain a factor, with northwest 20 km/h gusting to 40 at times. The high reaches -8°C, but it will feel closer to -20 in the wind. The UV index is 1 (low)—typical for early February.

Expected Conditions

Tonight delivers the biggest change. Skies turn to a few clouds, winds ease as the evening goes on, and the temperature drops hard to -24°C. Wind chill values are expected around -27 overnight, so the cold returns in a serious way for anyone out late or up early.

Tuesday, February 3 looks brighter but colder-feeling in the morning: a mix of sun and cloud with a high near -11°C. Wind chills could dip to around -29 early, improving to about -14 in the afternoon. There’s also a risk of frostbite, especially during the morning hours. Tuesday night turns to cloudy periods with a low near -19°C.

Wednesday, February 4 brings a cleaner winter day—sunny with a high near -7°C. Cloud increases Wednesday night, and the low is expected around -11°C.

Looking a bit farther out, Thursday is flagged for snow with a high near -3°C, and Friday returns to sunny conditions with colder nighttime lows again.

Wardrobe Recommendations

This is a “layer smart” day, and a “bundle up hard” night:

• For daytime: an insulated jacket with a wind-resistant shell, warm hat, and mitts. With gusts near 40 km/h, wind protection matters.

• Tonight and Tuesday morning: add a neck gaiter or balaclava—wind chills in the high minus 20s can be rough on cheeks and nose.

• Footwear: insulated boots with traction. Light snow and cold mornings often create slick patches at intersections and parking lots.

Weather Trivia

Thunder Bay’s winter often swings between “cloud and flurries” and “clear but colder.” When skies clear and winds ease, heat escapes quickly overnight—one reason the city can see a dramatic temperature drop like tonight. Lake air from Lake Superior can also help keep clouds and flurries hanging around on some days, even when totals stay light.

Weather Summary

Thunder Bay weather forecast for Monday, February 2, 2026: light snow this morning and a high near -8°C with a gusty northwest wind. A sharp drop tonight to -24°C, then a mix of sun and cloud Tuesday with morning wind chills near -29.