Thunder Bay Weather — Monday, December 1, 2025
Thunder Bay – Weather – It is a chilly and damp feeling start to December, this morning there were a few light snowflakes – precipitation ones – falling on the commute to work.
At 9:00 a.m. EST, Thunder Bay Airport reports light snow and –9.3°C (feels –14). Wind WSW 10 km/h, pressure 102.4 kPa and falling, humidity 67%, and visibility 24 km. It’s a gloves-on morning—yes, mittens on your kittens.
Today into Wednesday
Today (Mon): A mix of sun and cloud with a 30% chance of flurries this morning. Wind becoming west 20 km/h. High –7°C. Wind chill –22 this morning, easing to –12 this afternoon (UV index 1, low).
Tonight: Partly cloudy, wind up to 15 km/h. Low –21°C, wind chill –24 overnight. Expect icy patches after dark.
Tuesday: Mainly cloudy. 40% chance of flurries late afternoon. Wind becoming southwest 20 km/h early afternoon. High –4°C. Wind chill –25 in the morning, –8 in the afternoon.
Tuesday night: Cloudy with a 60% chance of flurries. Low –9°C.
Wednesday: Mix of sun and cloud with a 30% chance of flurries. High –9°C.
Wednesday night: Cloudy periods, 30% chance of flurries, low –22°C.
What to Wear & Travel Tips
Dress in layers: thermal base, warm mid-layer, and a wind-resistant parka. Add a toque, insulated mitts, scarf/neck gaiter, and insulated boots with grip. At these temps, salt works poorly—black ice is likely on bridges and side streets. Warm your vehicle, clear all windows, and keep an emergency kit handy.
Lakehead Weather Trivia
Northwest winds blowing over Lake Superior can spin up narrow flurry streamers—one neighbourhood sees flakes while the next stays bright under the same sky.
