Mother Nature and Her Affair with Tired Old Man Winter? What the Heck?

Winter Whispers Linger Despite Spring’s Promises

THUNDER BAY – WEATHER – The morning begins in a haze—literally—in Thunder Bay, where fog patches are shrouding the early hours, and the temperature is a frosty -6.7°C. The wind is blowing lightly from the west at 6 km/h, giving a wind chill of -10°C to remind you that winter hasn’t packed up quite yet.

With 98% humidity and barometric pressure rising at 102.6 kPa, the atmosphere is ripe for change—though not necessarily warmth.

Visibility is good at 24 km once the fog lifts, which it’s expected to do as the morning progresses. So hang tight, drivers and dog-walkers—the world will become visible again soon.

Friday Forecast: From Fog to Flurries (Because Why Not?)

Fog patches will burn off through the morning, giving way to increasing cloudiness around noon. Winds will stay light, up to 15 km/h, and temperatures will reach a daytime high of 6°C.

While that sounds downright balmy in April for Northwestern Ontario, don’t let it fool you—the wind chill this morning makes it feel like -11°C. The UV index reaches 4, a moderate level, so don’t forget those sunglasses once the sun makes a cameo appearance.

Tonight, things get a little messier with a 60% chance of rain showers or flurries this evening, transitioning fully to flurries near midnight. We’re expecting about 2 cm of fresh snow overnight. The temperature dips to -1°C, which doesn’t sound too harsh until you factor in the dampness and darkness—it’ll be a night for hot drinks and indoor plans.

Saturday: Flurries, Then a Bright Turn

Saturday kicks off with lingering flurries in the morning, tapering off as skies begin to clear. Winds will make their presence known, shifting to the northwest and gusting up to 50 km/h by late morning. The high nudges just above freezing to +1°C, but the gusty wind will take the edge off that warmth in a hurry. The UV index is a moderate 3, so sunglasses are still worth tossing in your bag.

Saturday night features cloudy periods and a 30% chance of flurries, with temperatures dropping to -8°C. So don’t leave the parka too far from the door just yet.

Sunday and Monday Outlook: Flurries Linger, Sunshine Tries

Sunday brings a mixed bag of sun, cloud, and a 40% chance of flurries—April’s signature dish, apparently. The high reaches +2°C, making it the warmest of the weekend. The night, however, tumbles to a teeth-chattering -12°C. Monday brings more sun and cloud, but with a high of only -2°C and another cold night dipping to -12°C, winter still has a solid grip on Thunder Bay.

What to Wear

Layers are non-negotiable. Start with thermals, add a fleece or wool middle layer, and finish with a windproof, waterproof outer shell. Gloves and a hat are still daily essentials. Don’t be tricked by the occasional sunshine—this isn’t sweater weather yet. It’s “I might still shovel snow” weather.

Historical Weather Snapshot

On April 4th in Thunder Bay history, the highest temperature recorded was a mild 13.8°C, while the coldest bottomed out at a frosty -21.7°C. So while today might feel wintry, we’re still operating within the usual range of early spring’s identity crisis.

Thunder Bay Weather Trivia

Did you know Thunder Bay has one of the sunniest winter climates in Canada? But it’s also one of the snowiest—meaning you might get a tan while shoveling your driveway. Ah, the classic Northern Ontario contradiction.