Montreal weather is set to start quiet overnight before turning wet before morning, with cloud cover, rain beginning before dawn and a low of 10. Environment Canada says Saturday should open mainly sunny, then see cloudiness build in the afternoon as the temperature climbs to 21.
For anyone planning a track day or other outdoor plans, the message is straightforward: the best window comes early, before the sky closes in later in the day. The shift from a bright start to thicker cloud cover is the kind of change that can turn a comfortable morning into a less reliable afternoon.
A separate supplementary forecast for Montréal on May 24, 2026 points to a much cooler, wetter setup. It calls for rain showers and temperatures near 12°C, with morning readings dropping to around 11°C.
That forecast says moderate rain is expected from 7 AM to 11 AM, with rainfall possibly totaling about 5.5 mm in that stretch. Winds may gust up to 32 km/h in the morning, and the rain is expected to continue into the afternoon even as temperatures edge back to 12°C. By evening, the forecast holds temperatures near 11°C.
The contrast matters because the same city is looking at two very different weather pictures across the weekend: one day with a sunny start and a mild high of 21, and another with steady rain, breezy conditions and temperatures stuck near the low teens. For Montreal, the immediate takeaway is that Saturday looks usable early, but the wetter May 24 forecast could force a change in plans for anyone hoping for dry conditions.
