Last updated: August 28, 2025
In December, the average temperature in Ulaan-Ereg, Mongolia hovers around -18°C (1°F), with extremes dipping as low as -36°C (-33°F) and peaking at 2°C (36°F). This chilly month sees a light precipitation of 3 mm (0.1 in) over just 1 day, while the average humidity remains high at 88%, creating a crisp and cold atmosphere.
In December, in Ulaan-Ereg, the average temperature is -18°C (1°F). Maximums can reach 2°C (36°F), while minimums can drop as low as -36°C (-33°F). It’s essential to pack warm clothing and be prepared for extreme cold when traveling during this time.
In Ulaan-Ereg in December, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.
In Ulaan-Ereg in December humidity is 88%. With an average temperature of -18°C (1°F), this humidity feels like a biting chill that seeps through layers of clothing, making travel outside a sharp and uncomfortable experience.
In Ulaan-Ereg 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 Ulaan-Ereg, you can visit Hourly UV Index in Ulaan-Ereg.
UV Risk Categories
Weather in Ulaan-Ereg varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ulaan-Ereg, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -20°C (-4°F) | 2 mm (0.1 inches) | 90% | low |
| February Weather | -16°C (4°F) | 3 mm (0.1 inches) | 80% | moderate |
| March Weather | -3°C (26°F) | 3 mm (0.1 inches) | 64% | moderate |
| April Weather | 5°C (42°F) | 8 mm (0.3 inches) | 59% | high |
| May Weather | 12°C (55°F) | 16 mm (0.6 inches) | 52% | very high |
| June Weather | 19°C (67°F) | 27 mm (1.0 inches) | 53% | very high |
| July Weather | 21°C (71°F) | 56 mm (2.2 inches) | 59% | very high |
| August Weather | 18°C (64°F) | 74 mm (2.9 inches) | 61% | very high |
| September Weather | 12°C (54°F) | 26 mm (1.0 inches) | 67% | high |
| October Weather | 2°C (35°F) | 12 mm (0.5 inches) | 67% | moderate |
| November Weather | -9°C (17°F) | 8 mm (0.3 inches) | 67% | moderate |
| December Weather | -18°C (1°F) | 3 mm (0.1 inches) | 88% | low |