Weather Alert: Summer Heat Peaks Before Rain Returns
A warm Tuesday with a 29°C high will feel closer to 35 with humidity before a cooler pattern settles in mid-week across Montreal.
Skip the light jacket Tuesday—Montreal's about to get a taste of summer. After a relatively mild Monday with showers expected to clear by afternoon, Tuesday will bring a significant jump: highs climbing to 29 degrees Celsius, but the humidex pushing the feel-up to around 35 degrees. Strong winds gusting to 60 km/h will add to the drama.
The warmth arrives suddenly and leaves just as fast. Tuesday evening into Wednesday morning will see showers return, followed by a cooler pattern settling in by mid-week. Overnight lows Wednesday could dip to 5 degrees—a sharp about-face from the summer preview.
For anyone planning outdoor activity, Tuesday is your window. By Wednesday, you'll want layers back in the rotation. The weather whipsaw is typical for late May in Montreal: one day you're thinking patio season, the next day you're remembering why spring jackets exist.