January Weather in Onon, Mongolia

Last updated: August 28, 2025

In Onon, Mongolia, the average temperature in January hovers around -22°C (-7°F). Experience chilling extremes, where the minimum can plunge to -40°C (-40°F) and the maximum teeters at -1°C (30°F). The month brings a scant 2 mm (0.1 in) of precipitation over 0 days, while the air remains remarkably moist with an average humidity of 92%.

January Temperature in Onon

In January in Onon, the average temperature is -22°C (-7°F), with maximums reaching -1°C (30°F) and minimums plunging as low as -40°C (-40°F). Travelers should be prepared for extreme cold and consider layered clothing to stay warm while exploring the winter wonderland.

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

The chart illustrates January temperature patterns in Onon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onon, January typically has an average temperature of -22°C (-7°F), with highs reaching up to -1°C (30°F) and lows dropping to around -40°C (-40°F).

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

January Precipitation in Onon

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

January Precipitation Trends in Onon

The chart displays monthly precipitation patterns in Onon, 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 Onon, 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 Onon

In Onon in January, humidity is 92%. With an average temperature of -22°C (-7°F), this humidity feels like stepping into a frigid cloud, where every breath becomes a struggle against the chill, and the damp air clings to you, making travel feel unforgiving and arduous.

January Average Humidity in Onon

This chart illustrates the average monthly humidity levels in Onon, 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 Onon is approximately 92%, 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 Onon

In Onon 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 Onon, you can visit Hourly UV Index in Onon.

Maximum UV Index Levels in Onon for January

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

Data source: Onon 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 Onon Compares to Other Months

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

This table compares monthly weather conditions in Onon, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-22°C (-7°F)	2 mm (0.1 inches)	92%	low
February Weather	-18°C (0°F)	5 mm (0.2 inches)	86%	moderate
March Weather	-6°C (22°F)	6 mm (0.2 inches)	72%	moderate
April Weather	4°C (39°F)	16 mm (0.6 inches)	67%	high
May Weather	10°C (51°F)	35 mm (1.4 inches)	69%	very high
June Weather	17°C (63°F)	71 mm (2.8 inches)	67%	very high
July Weather	19°C (66°F)	118 mm (4.6 inches)	79%	very high
August Weather	16°C (61°F)	95 mm (3.7 inches)	79%	very high
September Weather	10°C (51°F)	42 mm (1.6 inches)	82%	high
October Weather	0°C (33°F)	20 mm (0.8 inches)	79%	moderate
November Weather	-10°C (14°F)	7 mm (0.3 inches)	81%	moderate
December Weather	-19°C (-2°F)	4 mm (0.1 inches)	90%	low