Last updated: August 28, 2025
In Bayan, Mongolia, the average temperature in December hovers around -19°C (-1°F). Expect chilling lows of -42°C (-43°F) and rare highs of 1°C (34°F). Precipitation is minimal, with an average of just 4 mm (0.1 in) over the course of 1 day, while average humidity remains high at 90%.
In December in Bayan, the average temperature is -19°C (-1°F). Maximum temperatures can reach 1°C (34°F), while minimums can drop as low as -42°C (-43°F). It's advisable to bundle up and prepare for extreme cold conditions when traveling during this time.
In Bayan in December, the precipitation amount is 4 mm (0.1 in) over the course of 1 day.
In Bayan in December, humidity is 90%. With an average temperature of -19°C (-1°F), this humidity feels like an arctic fog that clings to your skin, making it challenging for traveling as the air is thick and your breath hangs visibly in the frigid environment.
In Bayan 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 Bayan.
UV Risk Categories
Weather in Bayan varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Bayan, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -21°C (-6°F) | 2 mm (0.1 inches) | 92% | low |
February Weather | -18°C (0°F) | 5 mm (0.2 inches) | 86% | moderate |
March Weather | -5°C (23°F) | 6 mm (0.2 inches) | 72% | moderate |
April Weather | 4°C (39°F) | 15 mm (0.6 inches) | 67% | high |
May Weather | 11°C (52°F) | 34 mm (1.4 inches) | 69% | very high |
June Weather | 17°C (63°F) | 62 mm (2.4 inches) | 67% | very high |
July Weather | 19°C (67°F) | 112 mm (4.4 inches) | 79% | very high |
August Weather | 16°C (61°F) | 84 mm (3.3 inches) | 79% | very high |
September Weather | 11°C (52°F) | 43 mm (1.7 inches) | 82% | high |
October Weather | 1°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 (-1°F) | 4 mm (0.1 inches) | 90% | low |