December weather forecast
Ulaanbaatar, Mongolia

December marks the peak of winter in Ulaanbaatar with temperatures consistently below freezing. Biting winds whip through the city streets, and snowflakes dance in the air to paint a wintry landscape. The December chill is intense with temperatures ranging from -22.9°C (-9.2°F) to -13.5°C (7.7°F). The scant daylight hours at 8.5 create a snowy twilight ambiance that prevails for the majority of the day. Facing such severe cold, appropriate winter gear, especially thermal insulation, is indispensable.

Temperature

As Ulaanbaatar transitions into December, a marked decrease in the average high-temperature is observed, dropping from a freezing cold -5°C (23°F) in November to an extremely cold -13.5°C (7.7°F). An average low-temperature of -22.9°C (-9.2°F) is noted during the month of December.

Humidity

January and December, with an average relative humidity of 78%, are the most humid months in Ulaanbaatar.

Rainfall

In Ulaanbaatar, Mongolia, during December, the rain falls for 0.2 days and regularly aggregates up to 4mm (0.16") of precipitation. Throughout the year, in Ulaanbaatar, there are 62.7 rainfall days, and 267mm (10.51") of precipitation is accumulated.

Snowfall

Months with snowfall are January through December. December has the most snowfall days of the year in Ulaanbaatar. Snow falls for 10 days.

Daylight

December has the shortest days of the year in Ulaanbaatar, with an average of 8h and 30min of daylight.
On the first day of the month, sunrise is at 08:20 and sunset at 17:02. On the last day of December, in Ulaanbaatar, sunrise is at 08:41 and sunset at 17:09 +08.

Sunshine

The month with the least sunshine in Ulaanbaatar is December, with an average of 5h of sunshine.

UV index

The months with the lowest UV index in Ulaanbaatar, Mongolia, are January, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 1 during December translates into the following guidance:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.