Last updated: August 28, 2025
In December, the average temperature in Erhet, Mongolia hovers around -16°C (4°F). Expect chilly extremes, with minimums plunging to -34°C (-29°F) and a maximum reaching just 1°C (33°F). Precipitation is quite light at 4 mm (0.1 in) over a single day, while the air remains notably moist, with an average humidity of 89%.
In December in Erhet, the average temperature is -16°C (4°F), with maximums reaching 1°C (33°F) and minimums dropping as low as -34°C (-29°F). Travelers should be well-prepared for extremely cold conditions during this time.
In Erhet in December, the precipitation amount is 4 mm (0.1 in) over the course of 1 day.
In Erhet in December, humidity is 89%. With an average temperature of -16°C (4°F), this humidity feels like an icy blanket wrapping around you, making traveling quite uncomfortable as the cold air combines with the moisture, creating a chilling sensation that seeps into your bones.
In Erhet 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 Erhet.
UV Risk Categories
Weather in Erhet varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Erhet, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -18°C (0°F) | 2 mm (0.1 inches) | 90% | low |
| February Weather | -14°C (6°F) | 7 mm (0.3 inches) | 77% | moderate |
| March Weather | -4°C (24°F) | 9 mm (0.3 inches) | 66% | moderate |
| April Weather | 4°C (39°F) | 20 mm (0.8 inches) | 70% | very high |
| May Weather | 11°C (52°F) | 29 mm (1.1 inches) | 65% | very high |
| June Weather | 16°C (62°F) | 70 mm (2.8 inches) | 73% | very high |
| July Weather | 18°C (65°F) | 92 mm (3.6 inches) | 78% | very high |
| August Weather | 15°C (60°F) | 103 mm (4.0 inches) | 79% | very high |
| September Weather | 10°C (51°F) | 45 mm (1.8 inches) | 79% | high |
| October Weather | 1°C (34°F) | 19 mm (0.8 inches) | 78% | moderate |
| November Weather | -8°C (18°F) | 9 mm (0.3 inches) | 78% | low |
| December Weather | -16°C (4°F) | 4 mm (0.1 inches) | 89% | low |