Last updated: August 28, 2025
In Ulaanhudag, Mongolia, the average temperature in December hovers around -16°C (3°F). Expect a chilly range where temperatures can drop to a frigid -35°C (-30°F), but might also reach a maximum of 7°C (44°F). With 3 mm (0.1 in) of precipitation over the month, the atmosphere remains quite humid, boasting an average humidity of 86%.
In December in Ulaanhudag, the average temperature is -16°C (3°F), with maximums reaching 7°C (44°F) and minimums plummeting to -35°C (-30°F). Travelers should be prepared for extreme cold and fluctuating temperatures during this time.
In Ulaanhudag in December, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.
In Ulaanhudag in December, humidity is 86%. With an average temperature of -16°C (3°F), this humidity feels like an icy blanket wrapping around you, making outdoor travel both brisk and invigorating, yet challenging as the cold air can quickly penetrate your clothing, adding an extra layer of difficulty for those venturing outside.
In Ulaanhudag 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 Ulaanhudag, you can visit Hourly UV Index in Ulaanhudag.
UV Risk Categories
Weather in Ulaanhudag varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ulaanhudag, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -18°C (1°F) | 2 mm (0.1 inches) | 89% | low |
| February Weather | -14°C (7°F) | 5 mm (0.2 inches) | 78% | moderate |
| March Weather | -4°C (25°F) | 6 mm (0.2 inches) | 66% | moderate |
| April Weather | 4°C (40°F) | 19 mm (0.7 inches) | 64% | high |
| May Weather | 11°C (53°F) | 22 mm (0.9 inches) | 52% | very high |
| June Weather | 18°C (64°F) | 40 mm (1.6 inches) | 59% | very high |
| July Weather | 20°C (68°F) | 59 mm (2.3 inches) | 63% | very high |
| August Weather | 17°C (62°F) | 82 mm (3.2 inches) | 62% | very high |
| September Weather | 11°C (53°F) | 44 mm (1.7 inches) | 65% | high |
| October Weather | 2°C (35°F) | 15 mm (0.6 inches) | 65% | moderate |
| November Weather | -8°C (18°F) | 11 mm (0.4 inches) | 69% | moderate |
| December Weather | -16°C (3°F) | 3 mm (0.1 inches) | 86% | low |