Experience the Final Supermoon of 2025 This December

Behold the Cold Supermoon

This December, we're treated to a celestial gift—the cold supermoon—on December 4. This spectacle will close out the lunar calendar for 2025, bringing with it unique characteristics and viewing tips that I want to share with you.

The term 'cold moon' accurately reflects the frigid temperatures that accompany this time of year, typical in many regions. The moon will not only shine brightly but will also be larger and more impressive than an average full moon, offering a remarkable sight for sky gazers.

What Exactly Is a Supermoon?

A supermoon occurs when a full moon coincides with perigee, the point in its elliptical orbit when the moon is closest to Earth. At its perigee on December 4, the moon will be about 357,000 kilometers away. While it may appear only slightly larger—up to 8%—it can shine up to 16% brighter than a standard full moon.

It's interesting to note that this cold supermoon will be the third consecutive one of the year. Compared to a typical full moon, this event is rarer, occurring under specific orbital alignments that bring the moon into our closer view.

Understanding the Significance

With December signaling the end of a lunar cycle, this supermoon holds both astronomical and cultural significance. It reminds us that as the calendar year comes to a close, nature has its own timing that we can observe and appreciate. While December's full moon will be particularly high in the night sky, it's the last of this year's full moons, adding a layer of finality and reflection as we transition into 2026.

“Though often lost in urban light, the size and brightness of a supermoon are best appreciated away from city lights.”

Viewing Tips for the Cold Supermoon

For the best experience, mark your calendars for 6:14 PM ET on December 4, when the moon will officially reach its full phase. To really appreciate its size and brightness, I recommend heading out to a spot with a clear, unobstructed view of the horizon. Moonrise tends to create a unique visual illusion, making the moon look even larger near the horizon due to atmospheric effects.

• Find an elevated location or meadow with an eastern horizon view.
• Be aware of weather conditions that may impact visibility.
• For a memorable experience, bring a friend or loved one to enjoy the view together.

What Lies Ahead

As you enjoy the beauty of the cold supermoon, think about the year ahead and the new beginnings that await. Although the next full moon won't occur until January 3, 2026—and it too will be a supermoon—it's advantageous to take stock now and reflect on your own resolutions.

In astronomy, as in life, transitions are essential for growth and renewal. This supermoon serves not just as a magnificent display but as a reminder of the cyclical nature of our existence. So, embrace this moment and let it inspire you to look to the future with hope.

To learn more about how lunar cycles influence us both scientifically and culturally, consider reading additional resources available at NASA's Lunar Exploration page.