Sault Ste. Marie Forecast: Snow Swirls, Wind Whirls, and the Spring That Stops and Starts

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Sault Ste. Marie Slips into a Wintry Weekend – Again

Sault Ste. Marie, ON – Friday, March 21, 2025 – Just when you thought spring was knocking at the door, winter barges back in without even wiping its snowy boots.

As of 6:00 AM EDT at the Sault Ste. Marie Airport, it’s a chilly -5.3°C under mostly cloudy skies. The air is heavy with moisture, with humidity sitting at a damp 97%, and a light breeze from the east at 5 km/h is just enough to add a slight wind chill of -8°C.

Visibility remains a strong 24 km, but the barometric pressure is at 100.8 kPa and falling, signalling that changes — and not the pleasant, sunny kind — are on their way.

Friday’s forecast holds onto its cloud cover, with a 60% chance of rain showers or flurries by this afternoon. Winds will switch up, picking up from the southwest at 30 km/h, and the daytime high will nudge up to +3°C. It won’t feel quite that balmy, though — the wind chill this morning bites at -10°C. UV index? A moderate 3, which might feel irrelevant when you’re dodging flurries, but don’t underestimate March’s sneaky sun.

A Wild and Windy Weekend on Tap

Tonight, things take a dramatic turn. That 60% chance of evening showers or flurries turns to a full-on flurry fest later in the evening, bringing 2 to 4 cm of snow. Add in some local blowing snow, and visibility could take a hit — not a great time to test your snow-driving skills. The wind will ramp up to a northwest gale at 40 km/h with gusts up to 60. The mercury dives to a bitter -16°C, and with the wind chill, it’ll feel closer to -24°C. Keep that hot chocolate close and your snowbrush closer.

Saturday, March 22nd offers a bright start with clearing skies in the morning, but don’t let the sunshine fool you — winter isn’t done yet. The high will struggle up to only -6°C, and wind chills will make it feel like -27°C early in the day. By the afternoon, it might improve slightly to a “mild” -14°C. Winds ease up a bit to 30 km/h from the northwest. The UV index bumps up to 4, so bring your sunglasses if you’re brave enough to face the chill.

Saturday night will be clear and cold with a low of -14°C — good news for stargazers, not so great for frostbitten fingers.

Sunday, March 23rd brings a mix of sun and cloud and a high near -2°C, before another round of snow settles in Sunday night. Monday continues the flurry train, with periods of snow and a high of -1°C. Monday night keeps things cloudy with a 60% chance of flurries and a low of -8°C.

What to Wear – Bundle Up Like a Snowman on a Coffee Break

If you’re heading out today, don’t be fooled by the positive temperature on the forecast — wind chills and surprise snow showers call for full winter attire. A warm coat, scarf, hat, and gloves are non-negotiable. Tonight and through the weekend, layers are key — think thermal base layers, insulated outerwear, and footwear that laughs in the face of slush. And with that wind coming in strong tonight, a hood that actually stays on might become your MVP.


Weather Trivia: Sault Ste. Marie’s Wild Weather History

On this day in history, Sault Ste. Marie once saw a high of 17.2°C back in 1938 — practically patio weather by comparison. And the record low? A frosty -28.9°C set in 1960. So yes, it could definitely be worse… but it could also be better.

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