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 | |
| Rainfall | 4 mm / 0.2 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 70% | 💧 humid |
| Dew point | -24°C / -11°F | |
| Sunshine | 6.7 h/day | |
| Daylight | 8.5 h | |
| Wind | 11 km/h / 7 mph | |
| Snowfall | 7.5 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.
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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.