Thunder Bay Weekend Weather: A Chilly Start, but Spring Teases with a Warm-Up!

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Munzeroy celebrates at the LUNSA Pow Wow. This young man has been following the Pow Wow trail for many years.
Munzeroy celebrates at the Lakehead U Pow Wow. This young man has been following the Pow Wow trail for many years. Image from 2017

Friday: Cold Morning, Clearing Skies

Thunder Bay starts cold today with flurries, but temperatures warm to 10°C by Sunday! A brief return to cooler conditions arrives Monday

Good morning, Thunder Bay! If you’re stepping outside early today, prepare for a brisk start. As of 7:00 AM at Thunder Bay Airport, the temperature is -14.1°C, with a west wind at 9 km/h making it feel like -20°C. The humidity is at 75%, and pressure is rising at 101.1 kPa. Visibility is a solid 24 km under mostly cloudy skies.

Expect a mix of sun and cloud today, with a 40% chance of flurries lingering through this morning and early afternoon. Skies will clear up as the day progresses. Winds will shift to the northwest at 20 km/h, gusting to 40 km/h this morning, before easing up in the afternoon. The high will reach -6°C, though the wind chill will make it feel like -20°C this morning and -10°C later today. The UV index is at a low 2, so you won’t need sunscreen, but sunglasses might help with the bright snow.

Friday Night: Clear and Frigid

Skies will remain clear tonight, but temperatures will drop significantly. Winds will stay light at up to 15 km/h, but that won’t prevent the temperature from plummeting to -18°C. The wind chill will make it feel like -13°C this evening and a bitter -25°C overnight—so make sure to bundle up if you’re heading out late.

Saturday: Clouding Up with a Chance of Flurries

Saturday will start off clear but become increasingly cloudy as the day progresses. A 40% chance of flurries is expected in the afternoon. Winds will stay light at up to 15 km/h. The high will climb to 0°C, though the morning wind chill will still be a harsh -25°C before conditions improve.

Saturday night will bring cloudy periods and a low of -7°C.

Sunday: A Major Warm-Up!

Sunday is shaping up to be a beauty! Expect a mix of sun and cloud with a 30% chance of flurries, but temperatures will soar to 10°C—a much-needed break from the deep freeze.

Sunday night will remain clear, with a low of -3°C.

Monday: Cooler, But Still Above Freezing

Monday will bring cloudy skies and a high of +3°C, though flurries may return by the evening, with a 30% chance of snow overnight and a low of -9°C.

Dressing for the Weather

Today and tonight, full winter gear is essential—wind chills near -25°C overnight mean exposed skin can freeze quickly. A warm coat, gloves, a hat, and a scarf are must-haves. By Saturday afternoon and Sunday, things will feel much milder, and you might be able to get away with a lighter jacket. Don’t get too comfortable, though—Monday cools things down again.

Did You Know?

On this day in Thunder Bay’s history, the warmest recorded temperature was 10.6°C in 2000, while the coldest was a frigid -37.8°C in 1972. So while today is cold, it could be a whole lot worse!

Stay warm today, Thunder Bay, and get ready for a taste of spring this weekend!

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