Last updated: August 28, 2025
In December, the average temperature in Uliastay, Mongolia plummets to -21°C (-6°F). Expect extremes, with lows reaching a chilling -45°C (-49°F) and highs soaring to -3°C (26°F). The landscape may be dry with a precipitation amount of just 6 mm (0.2 in) over 2 days, yet humidity remains high at an average of 96%. Bundle up and prepare for the cold!
In December in Uliastay, the average temperature is -21°C (-6°F), with a maximum that can reach -3°C (26°F) and a minimum that can plummet to -45°C (-49°F). Travelers should be well-prepared for extremely cold conditions during this time.
In Uliastay in December, the precipitation amount is 6 mm (0.2 in) over the course of 2 days.
In Uliastay in December, humidity is 96%. With an average temperature of -21°C (-6°F), this humidity feels like an icy blanket wrapping around you, making any travel difficult and uncomfortable as you navigate through the biting cold and damp air.
In Uliastay 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 Uliastay, you can visit Hourly UV Index in Uliastay.
UV Risk Categories
Weather in Uliastay varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Uliastay, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -23°C (-9°F) | 4 mm (0.1 inches) | 98% | low |
| February Weather | -19°C (-2°F) | 7 mm (0.3 inches) | 94% | moderate |
| March Weather | -9°C (16°F) | 10 mm (0.4 inches) | 88% | high |
| April Weather | 2°C (36°F) | 20 mm (0.8 inches) | 74% | high |
| May Weather | 9°C (48°F) | 19 mm (0.8 inches) | 50% | very high |
| June Weather | 15°C (59°F) | 31 mm (1.2 inches) | 48% | very high |
| July Weather | 17°C (62°F) | 62 mm (2.5 inches) | 49% | very high |
| August Weather | 14°C (57°F) | 64 mm (2.5 inches) | 54% | very high |
| September Weather | 8°C (47°F) | 26 mm (1.0 inches) | 59% | high |
| October Weather | -2°C (28°F) | 18 mm (0.7 inches) | 67% | moderate |
| November Weather | -12°C (10°F) | 10 mm (0.4 inches) | 86% | moderate |
| December Weather | -21°C (-6°F) | 6 mm (0.2 inches) | 96% | low |