January Weather in Altan, Mongolia

Last updated: August 28, 2025

In January, the average temperature in Altan, Mongolia hovers around -21°C (-6°F). While it can dip to a chilling -41°C (-42°F), the warmer side reaches a brisk -5°C (23°F). Expect minimal precipitation, with only 2 mm (0.1 in) falling over the course of 0 days. Notably, the average humidity is a striking 98%, adding to the crispness of the air. Stay warm!

January Temperature in Altan

In January in Altan, the average temperature is -21°C (-6°F). The maximum can reach -5°C (23°F), and the minimum can be as low as -41°C (-42°F). Be prepared for extreme cold if you plan to travel during this time.

January Weather in Altan: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Altan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altan, January typically has an average temperature of -21°C (-6°F), with highs reaching up to -5°C (23°F) and lows dropping to around -41°C (-42°F).

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

January Precipitation in Altan

In Altan in January, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

January Precipitation Trends in Altan

The chart displays monthly precipitation patterns in Altan, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Altan, January typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Altan

In Altan in January, humidity is 98%. With an average temperature of -21°C (-6°F), this humidity feels like trudging through a thick fog, making every breath heavy and the air feel wet and biting against the cold.

January Average Humidity in Altan

This chart illustrates the average monthly humidity levels in Altan, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Altan is approximately 98%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Altan

In Altan in January, 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 Altan, you can visit Hourly UV Index in Altan.

Maximum UV Index Levels in Altan for January

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

Data source: Altan January 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 January Weather in Altan Compares to Other Months

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

This table compares monthly weather conditions in Altan, showing how January’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)	98%	low
February Weather	-18°C (1°F)	5 mm (0.2 inches)	94%	moderate
March Weather	-7°C (20°F)	6 mm (0.2 inches)	88%	moderate
April Weather	4°C (40°F)	11 mm (0.4 inches)	74%	high
May Weather	11°C (52°F)	12 mm (0.5 inches)	50%	very high
June Weather	17°C (63°F)	21 mm (0.8 inches)	48%	very high
July Weather	19°C (66°F)	48 mm (1.9 inches)	49%	very high
August Weather	16°C (61°F)	43 mm (1.7 inches)	54%	very high
September Weather	10°C (50°F)	15 mm (0.6 inches)	59%	high
October Weather	0°C (32°F)	12 mm (0.5 inches)	67%	moderate
November Weather	-10°C (14°F)	6 mm (0.2 inches)	86%	low
December Weather	-20°C (-4°F)	4 mm (0.1 inches)	96%	low