From a Breezy Start to Full-Blown Summer in 48 Hours
WINNIPEG, MB – May 10, 2025 – If you blink this weekend, you might just miss spring altogether. Winnipeg is shaking off a cool and partly cloudy morning, with 5.1°C on the thermometer at 5:00 AM. Humidity is at a comfortable 54%, with an easterly breeze at 13 km/h. Visibility is a wide-open 24 km, and the barometric pressure sits at 102.7 kPa—but falling—signaling the approach of a major warm-up.
This morning starts sunny, but cloud cover will mix in by late morning. There’s a 30 percent chance of showers by midday, with winds picking up rapidly—southerlies will rise to 20 km/h, then ramp up to a blustery 40 km/h gusting to 60 near noon. The temperature will climb quickly, hitting a high of 24°C this afternoon, and with the UV index at 7, skin protection is a must if you’re spending time outside.
Blustery and Warm Tonight, Then Heat Wave Mode: ON
Tonight brings continued partly cloudy skies and a 30 percent chance of lingering showers. Winds will remain strong from the south at 30 km/h, gusting to 50 before settling down to calm overnight. But what will truly stand out is the low: a warm 17°C, far from Winnipeg’s usual May chill.
Sunday sets the thermostat to “blazing,” with a daytime high of 34°C and a humidex pushing that to a sweaty 35. Winds will ramp up again, coming from the south at 30 km/h and gusting to 50 in the afternoon. It’ll be a day to hydrate, lather on sunscreen, and stay cool—this kind of heat is rare this early in the season. The UV index remains high at 7, and Sunday night stays clear and hot with a tropical-feeling low of 19°C.
Monday Keeps the Heat On
The heat doesn’t break on Monday—if anything, it intensifies. Sunshine reigns again with a forecast high of 34°C and a steamy overnight low of 24°C. Winnipeg is getting a taste of July in mid-May.
What to Wear
Start with a light jacket this morning, but don’t be fooled—it’ll be shorts-and-sandals weather by this afternoon. Sunday and Monday call for full-on summer wear: tank tops, hats, sunglasses, and plenty of water. It’s also a good time to check on elderly neighbours and pets—early season heat can catch people off guard.
Weather Trivia: Blazing Into the Record Books?
The historical high for May 10 in Winnipeg is 33.3°C, set in 1987. With Sunday and Monday both forecast at 34°C, we may be writing a new chapter in the record books. Conversely, the coldest May 10 ever in Winnipeg dropped to -6.1°C in 1960—a reminder of just how wildly this prairie city can swing!
