Last updated: August 28, 2025
In December, the average temperature in Ulaantolgoy, Mongolia hovers around -20°C (-4°F), with extremes reaching a chilling -36°C (-33°F) at minimum and a brisk -3°C (27°F) at maximum. Expect a modest precipitation of 4 mm (0.1 in) spread over just 1 day, while the air remains notably damp, boasting an average humidity of 95%.
In December in Ulaantolgoy, the average temperature is -20°C (-4°F). Maximum temperatures can reach -3°C (27°F), while the minimum can plummet to as low as -36°C (-33°F). Travelers should be prepared for extremely cold weather conditions and dress accordingly to enjoy their visit.
In Ulaantolgoy in December, the precipitation amount is 4 mm (0.1 in) over the course of 1 day.
In Ulaantolgoy in December, humidity is 95%. With an average temperature of -20°C (-4°F), this humidity feels like an oppressive weight, making it challenging to breathe and travel comfortably, as the cold air combined with the dampness creates a biting chill that seeps into the bones.
In Ulaantolgoy 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 Ulaantolgoy, you can visit Hourly UV Index in Ulaantolgoy.
UV Risk Categories
Weather in Ulaantolgoy varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ulaantolgoy, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -23°C (-8°F) | 4 mm (0.2 inches) | 97% | low |
| February Weather | -19°C (-1°F) | 4 mm (0.2 inches) | 94% | moderate |
| March Weather | -8°C (17°F) | 11 mm (0.4 inches) | 87% | high |
| April Weather | 1°C (34°F) | 19 mm (0.7 inches) | 67% | very high |
| May Weather | 6°C (44°F) | 38 mm (1.5 inches) | 45% | very high |
| June Weather | 12°C (54°F) | 49 mm (1.9 inches) | 42% | very high |
| July Weather | 14°C (57°F) | 58 mm (2.3 inches) | 46% | very high |
| August Weather | 12°C (54°F) | 71 mm (2.8 inches) | 52% | very high |
| September Weather | 6°C (43°F) | 22 mm (0.9 inches) | 54% | high |
| October Weather | -3°C (28°F) | 7 mm (0.3 inches) | 63% | moderate |
| November Weather | -11°C (12°F) | 6 mm (0.2 inches) | 81% | moderate |
| December Weather | -20°C (-4°F) | 4 mm (0.1 inches) | 95% | low |