December 2025 Full Moon: Discover When to Witness the Stunning ‘Cold Supermoon’ Rise
The full Cold Moon will illuminate the skies on December 4, 2025. This astronomical event occurs as the last full moon of autumn in the Northern Hemisphere. It is notable for its size, being classified as a supermoon.
When to Witness the ‘Cold Supermoon’
The Cold Moon will reach its peak at 8:20 a.m. EST on December 4. It will appear full the night before and the night after. However, moonrise for optimal viewing occurs at dusk on December 5, when it will rise over the eastern horizon shortly after sunset.
Significance of the December Full Moon
Often referred to as the Cold Moon, it can also be called the Long Nights Moon or the Moon Before Yule, reflecting its ties to winter celebrations. This celestial event is the third of four supermoons in 2025.
Understanding Supermoons
A supermoon occurs when the full moon coincides with the point at which the moon is closest to Earth, known as perigee. This phenomenon causes the moon to appear larger and brighter in the night sky. In 2025, the Cold Moon will be 100% illuminated just 12 hours after it reaches perigee.
Distance and Size
- Average distance from Earth: 238,900 miles (384,472 kilometers)
- Distance of the Cold Moon: 221,965 miles (357,218 kilometers)
As the second-closest full moon of 2025, the Cold Moon will stand out for its brightness. In addition, it will rise highest in the sky, as it coincides with the winter solstice.
Best Viewing Conditions
For the best view of the Cold Moon, try to find an elevated location with an unobstructed view of the eastern horizon. Places like an east-facing coastline or an open field are ideal.
Sample Moonrise Times
| Location | Sunset Time | Moonrise Time |
|---|---|---|
| New York | 4:29 p.m. EST | 4:56 p.m. EST |
| Los Angeles | 4:43 p.m. PST | 5:27 p.m. PST |
Mark your calendars for this stunning celestial display. The Cold Supermoon promises to be an unforgettable sight as it rises above the winter landscape.
