The moon glows over Vancouver during a “supermoon” eclipse on September 27, 2015. (THE CANADIAN PRESS)
Canadians get a final chance this week to see the last supermoon of 2025. The event, known as the “Cold Moon,” appears larger and brighter than a usual full moon. It rises on December 4 and reaches its brightest point at 6:14 p.m. EST. This supermoon closes the year’s series and marks the last one until November 2026.
Sky watchers across the country expect a striking view, as the Cold Moon ends a run of three fall supermoons. Many consider this event a highlight for night-sky fans before the long winter months.
Why This Moon Looks Bigger
The Moon earns the supermoon label when it reaches full phase near perigee. This point marks the closest part of its orbit around Earth. The Moon’s path is not a perfect circle, so the distance changes. When the Moon moves closer, it appears slightly larger.
Experts say a supermoon can look up to 14 per cent bigger than the smallest full moon of the year. It can also shine as much as 30 per cent brighter. These changes make the Moon stand out more than usual, especially when it rises low on the horizon.
The Meaning Behind the Name “Cold Moon”
December’s full moon carries names rooted in seasonal changes and traditional teachings. The Almanac notes that “Cold Moon” comes from the Mohawk people. The name reflects the deep cold that settles in during early winter.
Some communities also call it the Long Night Moon. This title comes from the dark evenings that stretch out near the winter solstice. These long nights help create ideal viewing conditions for the bright full moon.
When and Where Canadians Can Look Up
People across Canada can see the Cold Moon if weather conditions hold. The best viewing comes shortly after moonrise. At this time, the Moon sits low on the horizon. This position makes it appear larger, with warmer tones that enhance the scene.
The Moon remains bright through the night, so viewers have many chances to watch. Those interested in the exact timing can check local moonrise information to plan their evening. Clear skies offer the best views, so many Canadians will hope for good weather when the Cold Moon climbs into sight.
A Fitting End to 2025’s Sky Shows
The year ends with a bright display that brings together science, tradition, and winter beauty. With no supermoon on the calendar until late 2026, this event offers a rare chance for casual observers and serious enthusiasts. Many Canadians plan to step outside to watch the last supermoon of the year rise over their communities.
