Montreal residents can expect a day of winter sunshine followed by the return of snow, according to the latest forecast from Environment Canada for Saturday, December 20, 2025.
A Sunny Start with Afternoon Clouds
The federal weather agency predicts that the day will begin with mainly sunny skies. However, the clear conditions won't last, as increasing cloudiness is expected to roll in during the afternoon. This shift will mark the beginning of a changing weather pattern for the city.
Brisk Winds and Significant Wind Chill
A west wind will blow at 20 km/h, with gusts potentially reaching up to 40 km/h in the morning. The wind is forecast to become lighter as the day progresses into the afternoon. Despite the sunshine, the combination of cold air and wind will make it feel much colder.
The expected daytime high will be minus 3 degrees Celsius. With the wind, it will feel more like minus 14 due to the wind chill factor. The UV index for the day is rated at 1, which is considered low.
Snow Returns Overnight
The weather will take a turn after dark. Environment Canada indicates that periods of snow will develop overnight. The overnight low temperature is forecast to dip to minus 2 degrees Celsius.
This forecast serves as a reminder of the variable nature of Montreal's winter weather, where conditions can shift from clear and cold to snowy within a single day. Residents are advised to enjoy the morning sunshine but to prepare for the possibility of snow-covered surfaces by Sunday morning.
