NetNewsLedger Weather Desk | Monday, June 23, 2025 – Weather Update
Sault Ste. Marie Sweats Through a Hot Monday — Relief Arrives Tonight
Residents of Sault Ste. Marie and St. Joseph Island are facing another sweltering day as Environment Canada’s Heat Warning remains in effect for the region. With humidex values soaring toward the low 40s, conditions will remain uncomfortably hot and sticky through the afternoon — but a cold front arriving tonight promises much-needed relief.
Current Conditions & Monday Forecast
At 6:00 AM EDT, temperatures at Sault Ste. Marie Airport registered a warm 22.3°C with a humidex of 31 and humidity at 92%. Winds are coming in from the south at 10 km/h, and the barometric pressure is 101.1 kPa and falling, a telltale sign of the approaching front. Visibility is fair at 19 km, though fog patches are still lingering in some areas.
Today’s forecast features a mix of sun and cloud, with a 30% chance of showers this morning and a risk of a thunderstorm. Fog patches will dissipate as the day progresses. Winds will shift to the southwest at 20 km/h, gusting to 40, with daytime highs peaking near 30°C and a humidex of 37. The UV index hits 10, which is rated very high, so sun protection is a must.
Tonight and Tuesday – From Sizzle to Sigh of Relief
A cold front moving in this evening brings a 60% chance of showers and risk of a thunderstorm, with fog patches developing overnight. Winds will taper off to calm after gusting out of the west at 20 km/h. Temperatures will finally ease to a more comfortable low of 15°C.
Tuesday starts off sunny, though increasing cloudiness is expected by late morning. Any leftover fog patches will burn off early. The high is a pleasant 22°C, with a UV index of 9, still very high, so keep the sunscreen handy. Tuesday night will feature cloudy periods and a low near 8°C.
Wardrobe & Safety Tips
Today calls for the full summer survival kit: breathable clothing, wide-brimmed hats, hydration, and shade breaks. Stay indoors during the hottest part of the day, and avoid strenuous activity, especially for vulnerable individuals like seniors, young children, and those with medical conditions.
And yes, it’s that time again: don’t leave pets or kids in cars, not even for a minute.
Weather Trivia: The Soo’s Summer Stats
The highest recorded temperature in Sault Ste. Marie? 37.2°C, set back on July 9, 1936 — part of a legendary heatwave that gripped much of North America. While today won’t break records, the heat and humidity combo will certainly make it feel just as intense.
