Flurries, Freezing Drizzle, and a Dash of Sunshine Coming Soon
Weather Report for Thunder Bay – Saturday, March 29, 2025
Thunder Bay residents are waking up to a mostly cloudy sky this morning, with a hint of winter still clinging on as March winds down. As of 7:00 AM EDT at the Thunder Bay Airport, the temperature is -4.6°C, and with a northeast breeze at 11 km/h, it feels more like -9°C. The humidity is sitting at 64%, and the barometric pressure is 102.1 kPa and rising, signalling that weather conditions are steadying.
Visibility is excellent at 24 km, but don’t be fooled—it’s not entirely smooth sailing ahead.
Saturday: Mostly Cloudy with a Flurry of Possibilities
Today’s forecast brings mainly cloudy skies, with a 60% chance of flurries this morning and a risk of freezing drizzle, especially for those up early. Temperatures will slowly climb to a high of zero, though wind chills of -12°C this morning and -5°C this afternoon will keep things feeling crisp. Winds from the northeast at 20 km/h will lighten up later in the morning, but keep that jacket zipped up. The UV index is 4, so if the clouds part, sunglasses are a good call.
Tonight: Gusts and Grey Skies
Expect cloudy skies tonight as winds pick up again, blowing from the northeast at 20 km/h and gusting to 40 km/h late this evening. The overnight low will fall to -7°C, and with the breeze, it’ll feel like -12°C. Perfect night to skip the night stroll and stay cozy indoors.
Sunday: Cloudy and Breezy with a Snowy Tease
Sunday remains cloudy, and the gusty northeast winds continue at 20 km/h with gusts to 40, keeping the high at just -1°C. Morning wind chills could feel like -14°C, improving only slightly to -7°C by the afternoon. So yes—still parka weather. Sunday night brings cloudy periods and a 60% chance of snow, with a low of -13°C.
Monday: Sunshine Returns (Briefly)
Start your week with clear blue skies and sunshine on Monday, though the air stays chilly with a high of -1°C. The temperature drops to -17°C Monday night under clear skies, so keep that extra blanket handy.
Historical Fun Fact: Thunder Bay Weather Edition
March 29 has seen some wild swings in Thunder Bay’s history—from highs near +15°C in the early 2000s to lows in the -25°C range decades ago. Today’s weather sits somewhere in the mild middle of the city’s storied late-March climate.
Wardrobe Wisdom: Layers Are Still In Style
Today’s look: function over fashion. A lined winter coat, gloves, toque, and boots with grip are must-haves. Layer up, especially in the morning and overnight, when wind chills plunge below -12°C. Sunglasses are a bonus if the sun decides to peek through the clouds.
Did You Know?
Thunder Bay is Canada’s sunniest city in winter with over 2,200 hours of sunshine annually. So if the clouds don’t part today, don’t worry—clear skies are always around the corner in the Bay.
