Ulaanbaatar weather in December

December in Ulaanbaatar: freezing, dry, with poor air quality — one of the weakest months to visit.

#12 of 12 months in Ulaanbaatar · #585 of 604 destinations to visit in December · comfort 28/100 (tier F)

Updated June 2026 · climate normals from ERA5 reanalysis

Ulaanbaatar climate normals — December

Daytime high-12°C / 10°F🥶 freezing
Nighttime low-23°C / -9°F
Feels like (high)-17°C / 1°F
Rainfall4 mm / 0.2 in☀️ dry
Rainy days1 days
Humidity70%💧 humid
Dew point-24°C / -11°F
Sunshine6.7 h/day
Daylight8.5 h
Wind11 km/h / 7 mph
Snowfall7.5 cm / 3 in
Air quality (US AQI)122😷 poor

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Where is Ulaanbaatar?

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Ulaanbaatar in December — FAQ

Is December a good time to visit Ulaanbaatar?
December in Ulaanbaatar: freezing, dry, with poor air quality — one of the weakest months to visit. It ranks #12 of 12 months for Ulaanbaatar on SeasonMap's comfort score (28/100).
What is the weather like in Ulaanbaatar in December?
In December, Ulaanbaatar averages a daily high of -12.2°C and a low of -23°C, with about 4.3 mm of rain over roughly 1.4 rainy days.
What is the air quality in Ulaanbaatar in December?
Ulaanbaatar has a mean US Air Quality Index of about 122 in December.
Does it snow in Ulaanbaatar in December?
Ulaanbaatar sees roughly 7.5 cm of snowfall in December.

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