Montreal Faces Heavy Rain and Severe Weather as Daylight Shrinks Ahead of Winter

Southern Quebec is preparing for a major shift in weather conditions, with heavy downpours, potential thunderstorms, and much colder temperatures heading toward Montreal and surrounding areas. A powerful weather system is expected to deliver substantial rainfall starting Tuesday morning, prompting special weather alerts across several sectors of the southern province, including Montreal, Montérégie, the Eastern Townships, and Beauce.

According to forecasts, certain areas could accumulate between 40 and 60 millimeters of rain by Wednesday, with the most intense precipitation expected during Tuesday afternoon and evening. A warm front is projected to bring an initial band of precipitation on Tuesday morning before the system moves into Montreal later in the day, bringing the remnants of these heavy rains into the evening hours.

This active weather system highlights a sharp meteorological contrast between Quebec and neighboring Ontario. While parts of Ontario are experiencing a brief return to summer-like warmth—with afternoon highs reaching up to 28 degrees Celsius and a humidex near 35 in Windsor—Quebec remains trapped between air masses, resulting in much more volatile conditions and a high of only 10 degrees Celsius in Montreal.

In addition to heavy rainfall, the system brings a risk of thunderstorms that could potentially clip Quebec on Tuesday. Forecasters note that while thunderstorms are possible, the heavy precipitation remains the primary weather threat for the province. October has already proven unusually active for thunderstorms in Quebec, logging seven stormy days by mid-October compared to a monthly average of five.

Beyond the immediate storms and chilly temperatures, the region is also reaching notable astronomical milestones as winter approaches. Montreal is crossing significant thresholds in daylight duration, with the length of the day dropping below 10 hours on November 4. This rapid reduction means the region is losing a little over two minutes of daylight each day, though the daily loss rate slows down as the winter solstice approaches.

Meteorologist Bertin Ossonon and meteorological bulletins point out that the daily loss of sunlight will continue to taper off in the coming weeks, dropping below a minute per day by December 10. The turning point of the year will arrive with the winter solstice on December 21 at 15:50, marking the shortest day of the year and the official moment when daylight duration begins to increase again.

Despite the gloomy outlook and cloudy skies that are expected to obscure the sun for much of the upcoming week, experts emphasize that the seasonal shift is entirely predictable. Ground-level perceptions of winter darkness can often feel harsher in January due to cold temperatures and gray skies, but the return of extended daylight is firmly anchored to Earth's orbital mechanics and will steadily build momentum after the solstice.