Preview: December 2025 Challenges Major Trend
December 2025 is set to bring unusual weather patterns to southern Quebec, with temperatures expected to remain significantly lower than normal. This change marks a striking contrast to the historical trend of rising temperatures typically observed during this month.
Winter Arrives Early in December 2025
Historically, December has been the warmest month in southern Quebec, particularly due to climate change. However, meteorologists predict that December 2025 will defy expectations with a persistent cold spell. The province is likely to experience fewer days above freezing compared to previous years.
- December temperatures are expected to be below normal across the province.
- No significant warming trends are anticipated throughout the month.
- Regions such as Montreal and Val-d’Or are projected to see a drop in the number of warm days.
Temperature Trends in Quebec
Climate data reveals that December has experienced the most substantial temperature increases compared to other months. Between 1961 and 1990, and again from 1991 to 2020, the average temperature in Montreal rose by approximately 2 °C. This warming had led to more frequent “green Christmases”; however, that is not expected this year.
Consistent Cold Weather Expected
Forecasts indicate that Quebec will not see a significant temperature shift as the month progresses. Cold conditions are anticipated to persist throughout December, with only brief periods of warming likely. Typically, Montreal would experience about 15 days with maximum temperatures above freezing in December; this count is expected to decrease significantly this year.
Atmospheric Patterns and Cold Nights
The expected cold winter is attributed to atmospheric circulation patterns that are maintaining cold air over the central and eastern parts of the continent. This situation could lead to early occurrences of freezing temperatures, with the first –20 °C nights arriving sooner than usual across the province.
As December unfolds, Quebec will brace for a winter that reflects the stark challenges posed by climate variability, highlighting the ongoing impacts of climate change.
