December 2025’s Super Cold Moon: The Last of Its Kind Until 2042

What Is the December Super Cold Moon?

On December 4, 2025, skywatchers around the world will witness a spectacular celestial event: the last supermoon of the year, dubbed the “Super Cold Moon.” This full moon will not only shine brighter and appear larger than usual but also reach its highest altitude in the sky—a phenomenon that won’t be repeated until 2042.

A supermoon occurs when the full moon coincides with the moon’s closest approach to Earth, making it appear about 7.9% larger and 15% brighter than a typical full moon. This December supermoon is also called the Cold Moon, reflecting the chilly winter season in the Northern Hemisphere and the lengthening nights that characterize this time of year.

Why Is This Supermoon Unique?

This event is remarkable for several reasons:

Highest altitude full moon: It will climb higher in the sky than any other full moon seen in 2025 and will not reach this extreme altitude again until 2042 due to an 18.6-year lunar cycle known as the Major Lunar Standstill.
Last supermoon before 2042: While there are supermoons scheduled after 2025, none are expected to be as high or as bright as this one, making it a once-in-a-generation sight.
Winter season significance: The Cold Moon occurs near the Winter Solstice, marking the longest nights and shortest days, offering a serene moment of reflection amid the winter’s stillness.

When and How to Watch

The full moon phase will peak on December 4 at around 23:14 UTC (local times vary). The moon will appear full for about three days around this peak, allowing plenty of chance to observe it.

To get the best view:

Look towards the eastern horizon just after sunset when the moon rises.
Use binoculars or a telescope for a closer, more detailed look.
Try to watch it from a location with a clear, unobstructed view of the sky.
Cities and elevated areas often provide clearer views away from street lights.

Spiritual and Cultural Significance

The Cold Moon is traditionally associated with themes of reflection, peace, and inner strength. Many cultures see it as a time to slow down, prepare for new beginnings, and embrace the stillness of winter. It’s sometimes called the “Long Night Moon” because it rises close to the Winter Solstice, linking it to themes of renewal and hope as the days slowly begin to lengthen again.

What to Expect Next?

After this grand finale supermoon of 2025, the next similar event with such an extreme altitude and brightness won’t occur until 2042. However, there will be other supermoons in the coming years, but none as dramatic as this December Cold Moon.