Sunny Labour Day Expected In Montreal And Waterloo As Winnipeg Faces Storms

Montreal could see a 30% chance of showers late Sunday afternoon and evening before skies clear overnight; Sunday’s humidex is expected to reach 29.
In Winnipeg, Sunday morning is forecast to begin with clear skies and temperatures near 19°C, offering a brief window for outdoor activities before conditions deteriorate in the afternoon.
Winnipeg’s Sunday afternoon temperature could reach 25°C but feel closer to 33°C with humidity, while thunderstorms and scattered showers develop with a 40% chance of rain.
For Labour Day in the forecast area covered by WDIO, scattered showers are expected mainly after 1 p.m., with southeast winds of 5 to 10 mph and gusts up to 15 mph; rain is expected to become heavier and more widespread as thunderstorms arrive Monday night.
Winnipeg’s stormy Sunday is expected to continue into the evening, when the precipitation chance rises to 60%; fog patches may develop overnight and reduce visibility.
Labour Day weather will split across Canada, with bright sunshine in Waterloo and Montreal but stormy conditions brewing in Winnipeg. Weather.gov forecasts Waterloo will hit 24°C with sunny skies and a high UV index, while Montreal sees 26°C and clear conditions. Both cities face a weather shift mid-week as clouds roll in and shower chances climb by Wednesday and Thursday.
Winnipeg tells a different story. The Weather Channel reports thunderstorms are expected Sunday afternoon and evening, with temperatures reaching 25°C but feeling like 33°C with humidity. A 40% to 60% chance of rain and possible fog overnight will make conditions more challenging for holiday plans.
High pressure is keeping both southern Ontario and Quebec pleasant through Labour Day. WGAL reports Waterloo will see fantastic sunshine with temperatures near 24°C and excellent conditions for outdoor activities. Montreal mirrors this pattern with sunny skies and a high of 26°C, though Sunday evening could bring a 30% chance of light showers that clear overnight.
The sunny stretch won't last long. By Wednesday, both cities face increasing clouds and shower chances as a new system approaches from the west. Weather Network indicates cooler temperatures will follow by week's end, ending the summer-like warmth of early September.
Winnipeg's Sunday morning starts pleasant—clear skies and 19°C—but deteriorates fast. WDIO forecasts thunderstorms arrive Sunday afternoon with a 40% chance of rain, peaking at 60% by evening. The humid air will make 25°C feel closer to 33°C, and fog patches may reduce visibility overnight.
Monday brings heavier rain and thunderstorms across Winnipeg. Scattered showers start after 1 p.m. with southeast winds of 5 to 10 mph gusting up to 15 mph. Conditions gradually improve later in the week as breezy, mostly sunny weather returns and temperatures cool.
A cold front moving in from the Plains will end the pleasant Labour Day conditions everywhere. KTTC reports showers and storms are expected to return by Tuesday in the western regions, with rain chances climbing as the week progresses. Higher humidity levels will also make a comeback mid-week before finally breaking.
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