A Damp Start to May in the Soo
Weather for Thursday, May 1, 2025
Sault Ste. Marie begins the month with a brisk 1.0°C reading under fully clouded skies, as reported at 6:00 AM from the Sault Ste. Marie Airport. The dew point is sitting right at 0.0°C with humidity at a near-saturating 93%, which means the air feels damp and ready for rain. Winds are coming in from the east-northeast at 17 km/h, and the barometric pressure is currently 101.7 kPa and falling—a classic clue that unsettled weather is inbound.
Visibility is a crisp 32 kilometres for now, but don’t be fooled by the current calm. The forecast calls for periods of rain to begin late this afternoon, with winds shifting slightly eastward to 20 km/h. The temperature will rise to a high of just 8°C. The UV index today sits at 6—high enough that any break in cloud cover could bring a sneak attack from the sun, so consider some sun protection if you’re out and about between showers.
Tonight, those expected rain showers will taper off before sunrise, but not before dumping 10 to 15 mm of moisture on the city. Winds will shift to the northwest at 20 km/h after midnight as the low dips to a mild +4°C. It’s the perfect night for hot tea and your coziest socks.
Friday and the Weekend Forecast
Friday, May 2, continues with grey skies and a 60 percent chance of afternoon showers. The day will be a bit breezy with northwest winds at 20 km/h becoming lighter later in the day, and a high of 8°C is expected. The UV index drops to a moderate 3, as cloud cover remains dominant.
Friday night holds a 30 percent chance of lingering showers with cloudy skies and a low near +2°C. But good news arrives with the weekend: Saturday will see the clouds roll away and the sun finally take the spotlight. Expect a cool but clear high of 7°C. Saturday night will be crisp with clear skies and temperatures near freezing at 0°C.
Weather Records: Historic Highs and Frosty Lows
On May 1, Sault Ste. Marie has seen a wide range of temperatures. The warmest ever recorded was a cozy 24.4°C in 2001. On the flip side, the chilliest start to May came in 1967, when temperatures plummeted to -5.6°C. This year, we’re somewhere in the middle: chilly enough for a warm coat, wet enough for waterproof shoes.
What Should You Wear?
Layers are your best bet today—start with something thermal and top it off with a waterproof jacket. Bring along an umbrella or hooded raincoat for late-day showers, and water-resistant footwear will save you from soggy socks.
Weather Trivia: Soo Many Clouds!
Did you know Sault Ste. Marie is one of Ontario’s cloudiest cities? On average, the city sees just over 1,400 hours of sunshine annually—less than half the total possible. So when the sun comes out Saturday, make the most of it!