The last supermoon of 2025, called the Cold Moon, will occur on December 4, appearing larger and brighter due to its proximity to Earth, and is best viewed around moonrise from an elevated, unobstructed location.
Arizona ranks No. 2 in the U.S. for viewing the December 4, 2025, Cold Moon Supermoon, thanks to its clear desert skies, dry air, and dark-sky zones, making it an ideal location for skywatchers to witness this rare, bright, and high-rising lunar event.
The December 2024 full moon, known as the "cold moon," will illuminate the sky this weekend, reaching its peak brightness early Sunday morning, December 15. Although it won't be a supermoon, it will still be a significant celestial event, coinciding with the Geminid meteor shower, which may be partially obscured by the moonlight. The "cold moon" nickname originates from Native American tribes, reflecting the onset of winter's chilly weather. The moon will be most visible in the northeastern U.S., with specific rise and set times provided for the New York City region.