December Weather in Haylaastay, Mongolia

Last updated: August 28, 2025

In Haylaastay, Mongolia, the average temperature in December hovers around -17°C (1°F), with extreme fluctuations from a chilling -35°C (-32°F) to a mild 3°C (38°F). Expect light precipitation, with an average of 5 mm (0.2 in) falling over 1 day. Additionally, the air is quite damp, with an average humidity level of 81%, adding to the brisk atmosphere of this winter month.

December Temperature in Haylaastay

In December in Haylaastay, the average temperature is -17°C (1°F). Maximums can reach 3°C (38°F), while minimums can plummet to as low as -35°C (-32°F). Be prepared for extreme cold conditions and dress in layers if you plan to travel during this time.

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

The chart illustrates December temperature patterns in Haylaastay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Haylaastay, December typically has an average temperature of -17°C (1°F), with highs reaching up to 3°C (38°F) and lows dropping to around -35°C (-32°F).

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

December Precipitation in Haylaastay

In Haylaastay in December, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

December Precipitation Trends in Haylaastay

The chart displays monthly precipitation patterns in Haylaastay, 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 Haylaastay, December typically receives around 5 mm (0.2 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 Haylaastay

In Haylaastay in December humidity is 81%. With an average temperature of -17°C (1°F), this humidity feels like an intense chill that seeps into your bones, making travel quite uncomfortable and requiring extra layers and preparation to stay warm and dry.

December Average Humidity in Haylaastay

This chart illustrates the average monthly humidity levels in Haylaastay, 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 Haylaastay is approximately 81%, 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 Haylaastay

In Haylaastay in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Haylaastay, you can visit Hourly UV Index in Haylaastay.

Maximum UV Index Levels in Haylaastay for December

The chart shows the monthly maximum UV Index (UVI) for Haylaastay 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 Haylaastay typically reaches 2, which falls under the low exposure category.

Data source: Haylaastay 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 Haylaastay Compares to Other Months

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

This table compares monthly weather conditions in Haylaastay, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-20°C (-4°F)	2 mm (0.1 inches)	91%	low
February Weather	-16°C (4°F)	4 mm (0.2 inches)	82%	moderate
March Weather	-4°C (25°F)	4 mm (0.2 inches)	54%	moderate
April Weather	5°C (41°F)	11 mm (0.4 inches)	53%	high
May Weather	12°C (55°F)	22 mm (0.9 inches)	56%	very high
June Weather	19°C (66°F)	29 mm (1.1 inches)	54%	very high
July Weather	22°C (71°F)	74 mm (2.9 inches)	65%	very high
August Weather	18°C (65°F)	76 mm (3.0 inches)	71%	very high
September Weather	13°C (56°F)	26 mm (1.0 inches)	71%	high
October Weather	3°C (38°F)	13 mm (0.5 inches)	68%	moderate
November Weather	-8°C (17°F)	10 mm (0.4 inches)	65%	low
December Weather	-17°C (1°F)	5 mm (0.2 inches)	81%	low