From Sunshine to Flurries, It’s a Classic March Mash-Up in the Bay
THUNDER BAY – WEATHER – It’s a brisk and beautiful morning in Thunder Bay, where the skies are mainly clear and the temperature is sitting at -12.6°C as of 7:00 AM. Visibility is excellent at 32 km, and there’s just a light westerly-northwest wind at 7 km/h, giving us a wind chill of -17°C to start the day. The barometric pressure is at 102.2 kPa, but it’s trending downward—a sure sign that this calm won’t last forever.
Humidity is sitting high at 91%, meaning the air has a damp chill that sneaks into your bones. So, while it looks nice out, it’s still solidly parka weather.
Today: From Sunny Start to Breezy Finish
Thunder Bay gets a dose of vitamin D this morning under sunny skies, but don’t let the brightness fool you—it’s still cold. The wind chill of -15°C will stick around for a bit, though things will start warming up nicely as the sun gains strength. Clouds will creep in early this afternoon as winds shift southeast at 20 km/h, gusting up to 40 km/h, before swinging around to the west later with similar gusts.
By afternoon, the high will reach a very spring-like +6°C. And with a UV index of 3, it’s a good day to bust out the sunglasses—and maybe your springtime optimism.
Tonight: Partly Cloudy with a Chance of Flurries
As the sun dips, the clouds linger and a 30% chance of flurries moves in overnight. Winds will ease briefly this evening before ramping up again from the northwest at 30 km/h, gusting to 50 by morning. The low temperature will dip to -1°C, but with that wind, it’ll feel closer to -7°C or lower.
Thursday: Flurry Flickers and Clearing Skies
Thursday starts with a 30% chance of flurries in the morning, but skies are expected to clear by the afternoon. Winds from the northwest will continue gusting to 50 km/h before calming down later in the day. The high will hit +2°C, with a morning wind chill of -7°C. The UV index ticks up slightly to 4—moderate but worth noting if you’re out and about.
Thursday night brings more clouds and a 40% chance of flurries, with the low falling to -7°C.
The Weekend Outlook: Winter’s Encore Performance
Friday brings a return to snowier weather with periods of snow throughout the day and a high of 0°C. That snow will continue into the evening, with lows down to -8°C.
Saturday offers cloudy skies and a 60% chance of snow, with colder temperatures returning—highs only reaching -3°C. The night stays overcast and drops further to -10°C.
Sunday looks to brighten up again with a mix of sun and cloud and a high of zero. Not warm, but not terrible either. Sunday night cools down considerably, dipping to -14°C under partly cloudy skies.
What to Wear: Layers Are Still the Law
Mornings demand winter coats, gloves, and scarves—no shortcuts here. But if you’re out during the afternoon, especially today and tomorrow, a layered approach will work. Maybe even unzip that coat just a little. Waterproof footwear is still a smart move for the slushy mix ahead, and a windproof outer layer will serve you well, especially once those gusts kick in.
Weather Trivia: Thunder Bay’s UV Boost
Fun fact: Even when it’s still cold, Thunder Bay’s location on the northern edge of Lake Superior means it can get surprisingly high UV readings this time of year due to snow reflection and clear skies. That sunburn you weren’t expecting? Blame the snow.
