A Calm but Cloudy Friday Morning in Thunder Bay
THUNDER BAY – WEATHER – It’s a calm start to the day in Thunder Bay, where the air is a crisp 3.5°C, the sky is mostly clouded over, and the fog is beginning its slow morning exit. With a near-silent north breeze at just 2 km/h and visibility at a solid 24 km, it’s a gentle beginning to what may be a mildly moody day. The barometric pressure reads 102.6 kPa and is on the decline, hinting that the atmosphere has a few tricks up its sleeve. Humidity is a touch high at 89%, enough to make your morning walk feel like you’re sipping the air.
This afternoon brings a 30 percent chance of showers, so don’t let the overcast lull you into leaving the umbrella at home. Winds will pick up a bit, shifting from the north at 20 km/h as the day unfolds. Highs will reach around 11°C — not quite t-shirt territory, but better than parkas and snow pants. The UV index rises to a moderate 5, meaning yes, sunscreen season is quietly creeping back.
Tonight: Clearing Skies and a Frosty Dip
The evening will see that same 30 percent chance of early showers before things start clearing up. Fog patches will reappear overnight, sneaking back in under partly clear skies. The wind will ease off this evening, allowing the temperature to dip to a chilly -1°C. With the air still damp, frost could be a late-night visitor — so maybe don’t put those scraper mitts away just yet.
Sunny Saturday Ahead
Saturday is shaping up to be a gem in this spring shuffle. The fog will clear in the morning, leaving behind a full day of sunshine and a high of 13°C. The UV index holds steady at 5, making this a great day for some long-awaited Vitamin D. Whether it’s a walk along the waterfront or just soaking in the rays from the porch, Saturday’s your window. Saturday night turns cloudy again, with a low of +1°C — just enough to remind you we’re not quite into true spring yet.
Sunday and Monday: Cloudy, Wet, and a Sprinkle of Snow
Sunday returns to cloudier habits, with a 30 percent chance of showers and a high of 11°C. The pattern continues overnight with a 40 percent chance of showers and a low of +4°C.
Monday is going full April mode with periods of rain and a cooler high of 9°C. The real curveball? By Monday night, the precipitation could shift to either rain or snow as temperatures fall to +1°C. That’s right — we’re not out of the snow woods just yet. Mother Nature likes to keep things spicy in Northwestern Ontario.
What to Wear in Thunder Bay Today
Bundle in layers with a waterproof outer shell just in case those afternoon sprinkles make an appearance. Add a scarf or a hat for that chill that sneaks in on light northern breezes. And for evening strolls? Gloves might still come in handy — literally.
Today in Weather History
On April 25th, Thunder Bay’s warmest recorded temperature soared to 23.8°C back in 1980, while the coldest dropped to a biting -9.4°C in 1983. This part of Ontario really knows how to keep us guessing.
Weather Trivia: Foggy Favourites
Thunder Bay’s early morning fog is no fluke. With Lake Superior’s cool spring temps meeting warming air, fog is practically a seasonal tradition. Add that to the city’s picturesque vistas, and you’ve got yourself a postcard — if you can see it through the mist.
