THUNDER BAY – WEATHER – Thunder Bay is sitting in a classic “in-between” winter pattern this morning—mostly cloudy skies, a steady northwest breeze, and a slow shift toward calmer weather as pressure rises.
That’s good news for visibility and travel overall, but it comes with a trade-off: when skies clear tonight, temperatures drop quickly. The longer-range signal is also clear—a gradual warm-up is building, with daytime temperatures climbing toward +3°C by Friday.
Today’s Weather Overview
Current Conditions
At 8:00 AM EST, Thunder Bay is mostly cloudy with the temperature at -9.9°C. A northwest wind at 14 km/h (gusting to 29 km/h) is pushing the wind chill to -16. Humidity is 70%, visibility is excellent at 32 km, and pressure is 102.3 kPa and rising—a sign the atmosphere is stabilizing.
Today
Environment Canada’s forecast issued 6:46 AM EST calls for mainly cloudy skies with a 40% chance of flurries. The northwest wind around 20 km/h eases early this afternoon, and temperatures climb to a high near -4°C. It will still feel colder than that, especially this morning, with wind chills around -15, improving to about -8 this afternoon. The UV index is 1 (low).
Extended Weather
Tonight: Clearing arrives this evening and the temperature falls to -17°C. Winds stay light (up to 15 km/h), but the air still bites—wind chill near -20 overnight.
Thursday, February 12: A bright winter day with sunny skies and a high near -2°C. The morning will feel sharp (wind chill near -21), improving to about -4 in the afternoon. Thursday night turns to cloudy periods with a low near -8°C.
Friday, February 13: The warm-up becomes noticeable. Expect a mix of sun and cloud and a high near +3°C. Friday night stays milder than earlier in the week with cloudy periods and a low near -7°C.
Wardrobe Recommendations
This is a “layer smart” day that ends with true winter cold:
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This morning: insulated coat, warm mid-layer, and mitts—the wind chill in the mid-teens below zero can sting fast.
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Tonight: plan for the colder drop—add a neck gaiter/scarf if you’re outside after dark.
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Later week: by Friday, daytime temperatures near or above freezing can mean slush by day and slick refreeze patches overnight, especially on shaded sidewalks and parking lots.
Weather Trivia
A rising barometer often signals calmer, improving weather—yet in winter it can also set the stage for colder nights. When skies clear and winds ease, the ground loses heat quickly after sunset, which is why tonight can feel colder even though today’s daytime trend is improving.
Summary
Thunder Bay weather for Wednesday, February 11, 2026: mostly cloudy with a 40% chance of flurries and a high near -4°C. Clearing tonight brings a colder low of -17°C. Sunny Thursday near -2°C, then a milder push arrives Friday with a high near +3°C.
