December weather forecast
Ulaanbaatar, Mongolia

The valley city of Ulaanbaatar in Mongolia, with the distant view of the mountain ranges
The valley city of Ulaanbaatar in Mongolia, with the distant view of the mountain ranges

Weather in December

December, the first month of the winter, in Ulaanbaatar, is still an extremely cold month, with temperature in the range of an average low of -22.9°C (-9.2°F) and an average high of -13.5°C (7.7°F).

Temperature

In December, the average high-temperature significantly decreases, from a subzero cold -5°C (23°F) in November, to a frigid cold -13.5°C (7.7°F). In Ulaanbaatar, Mongolia, in December, the average low-temperature is -22.9°C (-9.2°F).

Humidity

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

Rainfall

In Ulaanbaatar, in December, it is raining for 0.2 days, with typically 4mm (0.16") of accumulated precipitation. Throughout the year, in Ulaanbaatar, there are 62.7 rainfall days, and 267mm (10.51") of precipitation is accumulated.

Snowfall

January through December are months with snowfall. The month with the most snowfall days in Ulaanbaatar, Mongolia, is December when snow falls for 10 days.

Daylight

The month with the shortest days in Ulaanbaatar is December, with an average of 8.5h of daylight.

Sunshine

With an average of 5h of sunshine, December has the least sunshine of the year.

UV index

Months with the lowest UV index in Ulaanbaatar are January, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 1 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What are the most humid months in Ulaanbaatar?

Months with the highest humidity in Ulaanbaatar, Mongolia, are January and December, with an average relative humidity of 78%.

What is the average humidity in December in Ulaanbaatar?

In Ulaanbaatar, the average relative humidity in December is 78%.

How many days does it rain in December in Ulaanbaatar?

In December, in Ulaanbaatar, Mongolia, the rain falls for 0.2 days. Throughout December, 4mm (0.16") of precipitation is accumulated.

What is the snowiest month in Ulaanbaatar?

December has the most snowfall days of the year in Ulaanbaatar. Snow falls for 10 days.

How many days does it snow in December in Ulaanbaatar?

In Ulaanbaatar, Mongolia, during December, snow falls for 10 days.

What is the month with the shortest days in Ulaanbaatar?

With an average of 8.5h of daylight, December has the shortest days of the year in Ulaanbaatar.

What is the average length of the day in December in Ulaanbaatar?

In Ulaanbaatar, Mongolia, the average length of the day in December is 8.5h.

What is the month with the least sunshine in Ulaanbaatar?

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

How long on average sun shines in December in Ulaanbaatar?

In Ulaanbaatar, the average sunshine in December is 5h.

What is the month with the lowest UV index in Ulaanbaatar?

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Ulaanbaatar, Mongolia.

What is the UV index intensity in December in Ulaanbaatar?

In Ulaanbaatar, the average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in December
Ulaanbaatar, Mongolia

Average temperature in December - Ulaanbaatar, Mongolia
  • Average high temperature in December: -13.5°C

The warmest month (with the highest average high temperature) is July (24.5°C).
The month with the lowest average high temperature is January (-15.6°C).

  • Average low temperature in December: -22.9°C

The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is January (-25.9°C).

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Average humidity in December
Ulaanbaatar, Mongolia

Average humidity in December - Ulaanbaatar, Mongolia
  • Average humidity in December: 78%

Months with the highest relative humidity are January and December (78%).
The month with the lowest relative humidity is May (46%).

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Average rainfall in December
Ulaanbaatar, Mongolia

Average rainfall in December - Ulaanbaatar, Mongolia
  • Average rainfall in December: 4mm

The wettest month (with the highest rainfall) is August (70mm).
The driest month (with the least rainfall) is January (2mm).

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Average rainfall days in December
Ulaanbaatar, Mongolia

Average rainfall days in December - Ulaanbaatar, Mongolia
  • Average rainfall days in December: 0.2 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (0 days).

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Average snowfall days in December
Ulaanbaatar, Mongolia

Average snowfall days in December - Ulaanbaatar, Mongolia
  • Average snowfall days in December: 10 days

The month with the highest number of snowfall days is December (10 days).
The month with the least snowfall days is July (0.2 days).

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Average daylight in December /
Average sunshine in December
Ulaanbaatar, Mongolia

Average daylight in December / Average sunshine in December - Ulaanbaatar, Mongolia
  • Average daylight in December: 8.5h

The month with the longest days is June (Average daylight: 16h).
The month with the shortest days is December (Average daylight: 8.5h).

  • Average sunshine in December: 5h

The month with the most sunshine is May (Average sunshine: 9.7h).
The month with the least sunshine is December (Average sunshine: 5h).

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Average UV index in December
Ulaanbaatar, Mongolia

Average UV index in December - Ulaanbaatar, Mongolia
  • Average UV index in December: 1

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).

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