December is a fantastic month for stargazing. From bright moons and sparkling meteor showers to planets visible to the naked eye, this month is packed with sky‑watching opportunities. Whether you’re a beginner or just curious, this guide will help you spot December’s Full Moon, meteor showers, planets, and other astronomy events.
December 4 – Full Moon: The Cold Supermoon
On December 4, the Moon reaches its full phase, fully illuminated by the Sun. This Full Moon is also a supermoon, appearing slightly larger and brighter than usual because it’s near its closest point to Earth.
December 7 – Mercury at Greatest Western Elongation
Mercury reaches its greatest western elongation on December 7, appearing at its highest point above the eastern horizon just before sunrise. This is the best time to spot the elusive planet.
Viewing tip: Look low in the eastern sky just before sunrise. Early risers get the reward of seeing Mercury at its most visible.
December 13–14 – Geminid Meteor Shower
The famous Geminids are often considered the best meteor shower of the year. On the nights of December 13–14, you could see up to 120 meteors per hour, streaking across the sky.
In 2025, the Moon will be a thin crescent, so its light won’t interfere much—making it an excellent year to watch. Geminids are slower and brighter than many other meteor showers, giving you more time to enjoy each meteor. The best time to view is after 8 p.m., with peak activity around midnight to pre-dawn.
December 21 – Winter Solstice
The December solstice occurs on the morning of December 21 at 10:02 AM ET (15:02 UTC). In the Northern Hemisphere, it’s the first day of winter, with the shortest day and longest night of the year. In the Southern Hemisphere, it marks the start of summer.
Celebrate by observing the night sky, especially after sunset, and be reminded of how Earth’s tilt affects the seasons.
December 21–22 – Ursid Meteor Shower
The Ursids are a smaller meteor shower, peaking overnight from December 21–22. Expect about 5–10 meteors per hour, though occasional bursts can be much higher.
Good news! The new Moon on December 20 ensures dark skies for easy meteor spotting. The best time for reviewing is after midnight in a dark location. Meteors radiate from the Ursa Minor constellation but can appear anywhere in the sky.
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The Old Farmer’s Almanac. (2025, November 3). December 2025 Night Sky Guide: Full Moon, Meteors & More. Almanac.com. Retrieved from https://www.almanac.com/night-sky-december Alm
