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Ulaanbaatar Weather in December
December in Ulaanbaatar brings very low temperatures around -13°C (9°F) during the day, dropping to -25°C (-13°F) at night, with minimal snowfall.
Rainfall in Ulaanbaatar in December
The climate data from previous years indicates about 4 days of snow, averaging 4.8 mm (0.2 in) for the month. The occasional light shower is possible, but rain is rarely an issue this month.
Temperature in Ulaanbaatar in December
December in Ulaanbaatar sees highs of -13°C (9°F) and lows of -25°C (-13°F) overnight. December is part of the winter season. Expect a distinctly cold feel throughout the day, not just overnight. Nights are well below freezing at -25°C (-13°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. It's a frigid month, so wearing warm clothing is crucial. Don't underestimate the cold; prepare accordingly.
Sunshine in Ulaanbaatar in December
The city usually sees around 154 hours of sunlight, indicating a moderately sunny period.December in Ulaanbaatar has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Ulaanbaatar Temperature in December
Min Temperature
-25°C (-13°F)
Max Temperature
-13°C (9°F)
Chance of Rain
14%
Precipitation
4.8 mm (0.2 in)
Rainy days
4 days
Humidity
79%
Sunshine
154 hours
Percentage Sunshine
Ulaanbaatar Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ulaanbaatar - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ulaanbaatar typically drop from around -12°C (10°F) at the start of December to approximately -17°C (1°F) by the end. Nights are very cold, with lows typically ranging from -28°C (-18°F) to -23°C (-9°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather records for Ulaanbaatar in December
Browse day-by-day weather records for Ulaanbaatar spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ulaanbaatar historical weather extremes in December
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Ulaanbaatar.
- On December 2, 1989, temperatures climbed to 4°C (39°F), marking the warmest December day on record.
- The coldest night in December in Ulaanbaatar was on December 23, 2012, with a minimum of -41°C (-42°F).
Best Places in Mongolia in December
Find out more about the weather in Mongolia and which places have the best travel conditions in this month. See all of Mongolia in December →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Ulaanbaatar in December
It's wise to bundle up for freezing conditions in Ulaanbaatar in December. If you have a winter jacket with good insulation, waterproof winter boots, thermal layers, and warm accessories it's smart to pack them. Hand and foot warmers can be lifesavers, especially during the night. Dry conditions mean you won't need to worry about rain protection. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Ulaanbaatar in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling1/10 -
Walking1/10 -
Camping2/10 -
Outdoor sports1/10
Ulaanbaatar 3-Day Forecast
More climate data for Ulaanbaatar
Temperature Rainfall Sunshine Humidity
See the full Ulaanbaatar climate overview or explore weather in Mongolia.
Popular in December
Where to go in December - average daytime high across popular destinations.
Dalanzadgad
-5°C (23°F) Zamiin Ude-7°C (19°F) Gobi desert-8°C (18°F) Saikhan-ovoo-8°C (18°F) Baitag
-10°C (14°F) Baruun Urt-12°C (10°F) Ulaanbaatar-13°C (9°F) Ulan Gom-13°C (9°F) Bucket list
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