December Weather in Herlen, Mongolia

Last updated: August 28, 2025

In Herlen, Mongolia, the average temperature in December is a biting -19°C (-2°F), with extremes reaching as low as -37°C (-35°F) and peaking at a chilly 2°C (36°F). Expect minimal precipitation, averaging just 3 mm (0.1 in) over the course of 1 day. The average humidity during this time hovers around 80%, adding to the frosty atmosphere.

December Temperature in Herlen

In December in Herlen, the average temperature is -19°C (-2°F). The maximum can reach 2°C (36°F) and the minimum can be as low as -37°C (-35°F). Travelers should be prepared for extremely cold conditions during this time.

December Weather in Herlen: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Herlen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Herlen, December typically has an average temperature of -19°C (-2°F), with highs reaching up to 2°C (36°F) and lows dropping to around -37°C (-35°F).

Data source: Temperature data for Herlen generated using information from the Copernicus Climate Change Service.

December Precipitation in Herlen

In Herlen in December, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.

December Precipitation Trends in Herlen

The chart displays monthly precipitation patterns in Herlen, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Herlen, December typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 1 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Herlen

In Herlen in December humidity is 80%. With an average temperature of -19°C (-2°F), this humidity feels like an icy blanket enveloping you, making every breath sharp and crisp, while the dampness clings to your skin, transforming even the simplest outdoor activities into a chilling challenge for travelers.

December Average Humidity in Herlen

This chart illustrates the average monthly humidity levels in Herlen, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Herlen is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Herlen

In Herlen in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Herlen.

Maximum UV Index Levels in Herlen for December

The chart shows the monthly maximum UV Index (UVI) for Herlen in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Herlen typically reaches 1, which falls under the low exposure category.

Data source: Herlen December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Herlen Compares to Other Months

Weather in Herlen varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Herlen, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Herlen, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-21°C (-6°F)	2 mm (0.1 inches)	85%	low
February Weather	-17°C (2°F)	3 mm (0.1 inches)	75%	moderate
March Weather	-4°C (25°F)	4 mm (0.1 inches)	55%	moderate
April Weather	5°C (41°F)	8 mm (0.3 inches)	54%	high
May Weather	12°C (54°F)	19 mm (0.7 inches)	52%	very high
June Weather	19°C (66°F)	32 mm (1.2 inches)	51%	very high
July Weather	21°C (70°F)	66 mm (2.6 inches)	64%	very high
August Weather	17°C (64°F)	75 mm (2.9 inches)	67%	very high
September Weather	12°C (54°F)	28 mm (1.1 inches)	68%	high
October Weather	2°C (35°F)	14 mm (0.5 inches)	65%	moderate
November Weather	-9°C (15°F)	9 mm (0.3 inches)	63%	low
December Weather	-19°C (-2°F)	3 mm (0.1 inches)	80%	low