Weather in Ulaanbaatar in December 2025
Average weather
Average temperature in Ulaanbaatar in December
The expected average maximum temperature in December is -16°C with a maximum of -2°C and a minimum of -38°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from -10°C to -10°C.
Is Ulaanbaatar warm or cold in December?
Ulaanbaatar is typically cold in December.
Maximum temperatures go down compared to the previous month from -5°C to -13°C. The minimum temperature also goes down from -17°C to -24°C.
Wear your winter warms as it will be cold. To save space, layer, and don’t forget gloves and a scarf.
December is one of the coolest months in Ulaanbaatar, here is the comparison with other months:
Climate in Ulaanbaatar in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| -5°C | -13°C | -15°C | ||||
| Min. temperature | ||||||
| -39°C | -38°C | -41°C | ||||
| Max. temperature | ||||||
| +13°C | +5°C | -2°C | ||||
| Rainfall | ||||||
| 0 mm | 0 mm | 0 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 71% | 74% | 75% | ||||
| Air pressure | ||||||
| 1022 HPa | 1025 HPa | 1026 HPa | ||||
| Sunny days | ||||||
| 14 | 15 | 16 | ||||
| Cloudy days | ||||||
| 12 | 13 | 13 | ||||
| Rainy days | ||||||
| 0 | 0 | 0 | ||||
| Snowy days | ||||||
| 4 | 3 | 2 | ||||
December weather is still as good as in November. It’s getting colder in December. From -5°C in the day, the average maximum temperature lowers to -13°C. The rainfall amount in December stays the same as in the previous month with a 0 mm of total precipitation. Humidity rises from 71% to 74%. The average wind speed doesn’t change much during December, staying around 1 m/s. The good news is there are likely to be more sunny days in December, from 14 to 15.
January brings much the same weather, it remains good.
Wind
The average wind speed is 1 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Ulaanbaatar is gradually decreasing during December, going from 2 m/s to 1 m/s over the course of the month.
Snow
Here’s how December is compared with other months in the amount of snow, total mm:
How was the weather last December in Ulaanbaatar?
Climate Change over Years
The climate in Ulaanbaatar in December has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+4°C) and the highest in 2007 (+9°C). The driest year was 2017 with only 192 mm of rainfall, and the wettest year was 1984 with 432 mm.
FAQ
Is December a good time to visit Ulaanbaatar?
Can you sunbathe in Ulaanbaatar in December?
Is Ulaanbaatar rainy in December?
Is it sunny in Ulaanbaatar in December?
Monthly weather in Ulaanbaatar
Source of the data
For this page, we’ve looked at the typical weather in Ulaanbaatar, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
