Capture the last full moon of 2025 as the Cold Supermoon illuminates the autumn sky on December 4

On December 4, 2025, stargazers will be treated to the final full moon of the year, known as the Cold Supermoon. This celestial event will occur at 8:13 p.m. EST (2313 UTC), illuminating the eastern horizon as the moon rises. The Cold Supermoon is named for the chilly temperatures associated with this time of year.

What is a Cold Supermoon?

The December full moon has various names, including the Cold Moon and the Long Night Moon. The Cold Moon refers to the dropping temperatures, while the Long Night Moon acknowledges the extended nights and reduced daylight as winter approaches in the northern hemisphere.

Why is it Special?

• The Cold Supermoon occurs when the moon is near perigee, its closest point to Earth.
• This proximity allows the moon to appear up to 14% larger and 30% brighter than a typical full moon.

During this event, skywatchers in the United States can expect a spectacular view as the moon rises. It will outshine the nearby stars in the constellation Taurus and the Pleiades open star cluster.

Viewing Conditions

As the Supermoon rises, it may take on a stunning yellow-orange hue due to Rayleigh scattering, which affects how we perceive colors in the atmosphere. Additionally, an optical illusion known as the “moon illusion” can make the lunar disk appear larger when it’s close to the horizon.

How to Experience the Cold Supermoon

Observers will find that December’s full moon ascends higher in the sky compared to previous months. This change compensates for the sun’s shallower path as winter solstice approaches on December 21.

To enhance your experience, consider using a small telescope. This will allow you to see the vast lunar plains, known as lunar maria, and the craters and mountain ranges on the moon’s surface.

Capture the Moment

If you want to share your experience, Emegypt encourages readers to submit photos of the Cold Supermoon. Include your name and location for potential features on the site.

Prepare for an enchanting evening as the Cold Supermoon lights up the autumn sky, providing a perfect reason to gaze upward.