The Cold Moon is the traditional name for December's full moon in the North American almanac list, named for the season when winter cold sets in for good. Because it falls close to the December solstice, it sits opposite the low winter Sun, so in the Northern Hemisphere it rides higher across the sky and stays up longer than any other full moon of the year. Its other common names, the Long Night Moon and the Moon Before Yule, say the same thing in different words.
The best way to understand the Cold Moon is to follow it through a single night.
Sunset: up as the Sun goes down
A full moon rises in the east at about the time the Sun sets in the west, because the two are on opposite sides of the sky. In December, at mid-northern latitudes, that's early: in many places the Sun is gone by half past four or five o'clock, and the Cold Moon comes up over the rooftops while people are still on the way home from work.
Near the horizon it often looks large and colored, amber or orange, because you're seeing it through a thick layer of air that scatters away the blue. The size is mostly the Moon illusion, the trick that makes a low Moon look bigger next to buildings and trees. Give it half an hour and it will have whitened and climbed clear of the houses.
This is a good moment to go out, if you only go out once. It's not yet bitterly cold, and the contrast of a rising full moon against a deep blue December sky is hard to beat.
Midnight: higher than any other full moon
Here's the Cold Moon's real distinction. In December, the Sun runs its lowest, shortest path of the year across the southern sky. The full moon sits opposite the Sun, so it takes the opposite path: high, long and arching nearly overhead at mid-northern latitudes. Around midnight, a December full moon can stand about as high as the midday Sun does in midsummer.
That has some effects you can see:
- Short, sharp shadows. A high Moon throws crisp shadows almost beneath you, the way a summer noon Sun does.
- Brightness on snow. With snow on the ground, a high full moon can make a field or a street bright enough to walk without a flashlight, with blue-white shadows under every tree.
- Clear, cold air. Winter nights are often clearer and drier, so the Moon looks crisp, with its dark "seas" easy to pick out even without binoculars.
Before dawn: the end of the longest nights
The full moon sets in the west at about the time the Sun rises in the east, so the Cold Moon is up for essentially the whole night. And in December, the nights are long. At the latitude of New York or Madrid, the longest night lasts close to fifteen hours, and a full moon near the solstice can be above the horizon for most of that time. Farther north, it's longer still.
In the Southern Hemisphere it's the other way around. December is midsummer there, nights are short, and the December full moon skims low across the sky, much as June's Strawberry Moon does in the north.
Names for the midwinter moon
The Cold Moon belongs to the modern almanac list of twelve names. The Old Farmer's Almanac describes it as the moon when winter cold fastens its grip. Like the rest of the list, it's best understood as part of a North American almanac tradition assembled from several sources, not as one Indigenous nation's month name; those varied by nation, region and language.
Other names in circulation include:
- Long Night Moon, for the near-solstice darkness
- Moon Before Yule, the full moon ahead of the midwinter festival
- Oak Moon and Frost Moon, which turn up in some modern lists
The December solstice, the year's longest night in the north, falls on or around December 21 or 22, and in some years the full moon lands within days of it. For ways to mark the solstice itself, see winter solstice rituals, and for January's full moon, the next in the list, see Wolf Moon meaning.
The Cold Moon in a chart
In December the Sun is in Sagittarius or Capricorn, so the Cold Moon falls opposite in Gemini or Cancer.
A Cold Moon in Gemini, with the Sun in Sagittarius, sits on the axis of information and meaning. December is full of messages, cards, invitations and logistics, and astrologers read this full moon as the point where the details threaten to drown out the bigger picture. A good night to answer the messages that matter and let the rest wait.
A Cold Moon in Cancer, with the Sun in Capricorn, puts the Moon in the sign it traditionally rules. Astrologers read it as a strongly emotional, home-centered full moon set against the Capricorn pull of year-end duty and goals. Family gatherings around the holidays fit it closely, for better and worse. If you want to know more about the sign the Sun is in, see Capricorn traits.
As with every full moon, the theme is culmination: the year coming to a head, and a natural point to look back before the new one starts.
A long-night practice
The Cold Moon offers something rare in a busy month: a long, dark evening with a natural reason to slow down. A simple practice:
- Light a candle and turn off the overhead light. Put the candle on a stable, heat-proof surface, away from curtains, decorations, pets and children, and never leave it burning unattended. Our guide to a candle ritual for beginners has more on doing this safely.
- Write three things the year taught you. Not achievements: lessons. Something you'd do differently, something you'd do again.
- Write one thing to carry through winter. A habit, a friendship, a bit of quiet you want to protect.
- Go out for five minutes. Wrap up properly, look up at the Moon riding high, and come back in.
The tarot card that fits the Cold Moon best is The Hermit: a figure on a snowy height, holding up a lantern on the longest night, looking for what matters by a small light. You can read its meaning on The Hermit card page. Upcoming full moon dates and signs are on our full moon calendar.
Questions readers ask
Is the Cold Moon the last full moon of the year?
Usually. It's the name for December's full moon, which is the last of the calendar year in almost every year. If two full moons fall in December, the second is called a blue moon under the calendar-month rule.
Why is the Cold Moon so bright?
It isn't intrinsically brighter than other full moons, but it rides higher in the Northern Hemisphere sky, so its light passes through less atmosphere and falls more directly. On snow it can seem remarkably bright. If it happens to fall near the Moon's closest point to Earth, it will also be a supermoon.
What does the Cold Moon mean spiritually?
There's no single traditional meaning beyond its seasonal one: darkness, cold, rest and the turning of the year. Many people use it as a natural moment for year-end reflection, and astrologers read it through the sign it falls in, usually Gemini or Cancer.
Is the Cold Moon the same as the Long Night Moon?
Yes. They're two names for December's full moon, along with the Moon Before Yule. Different lists prefer different names, but they all point at the same full moon of the longest nights.
