Calgarians can enjoy one more relatively gentle day before a dramatic shift in the weather pattern sends temperatures into a deep freeze to end the week. While Tuesday will be less gusty and slightly cooler than recent days, the region remains in a temporary mild stretch for now.
A Temporary Reprieve from the Chill
According to meteorologist Danielle Savoni, residents should expect conditions to stay within the normal to mild range for the next few days. The reprieve, however, will be short-lived. The significant change is scheduled for Friday, December 19, 2025, when a cold air mass is forecast to move into the region.
Tuesday's weather serves as the calm before the storm, offering a final opportunity to enjoy the milder conditions. The forecast indicates that while it will be less warm and less windy compared to Monday, it will still be noticeably temperate for mid-December.
The Impending Frigid Front
The real story is the impending cold snap. Starting Friday and continuing through the weekend, temperatures are expected to plummet, bringing a period of frigid weather to Calgary and much of Alberta. This sharp decline marks the end of the current mild stretch and a return to more seasonally harsh winter conditions.
Savoni's analysis, published on December 15, 2025, warns that the plunge will be substantial. The exact temperature lows were not specified in the initial report, but the terms "plummet" and "frigid" strongly indicate a return to sub-zero temperatures typical of a Prairie winter, potentially accompanied by wind chills.
Planning Ahead for the Weekend
For Calgarians making plans for the upcoming weekend, this forecast is a critical piece of information. Outdoor activities will likely require significant bundling up, and precautions for pets, vehicles, and home plumbing should be considered ahead of the freeze.
The brief period of mild weather earlier in the week is not uncommon for Alberta, where Chinook winds and variable systems can cause rapid fluctuations. However, the consistent message from the forecast is clear: the mild interlude is ending, and a cold, wintry pattern is set to establish itself firmly by Friday.
