Last updated: August 28, 2025
In Ongon, Mongolia, the average temperature in December hovers around -18°C (1°F). Expect the minimum to plunge to -35°C (-31°F), while the maximum can reach a mild 7°C (44°F). Precipitation is minimal, with 5 mm (0.2 in) expected over just 1 day. The air remains quite damp, boasting an average humidity of 86%.
In December in Ongon, the average temperature is -18°C (1°F), with a maximum that can reach 7°C (44°F) and a minimum that can drop as low as -35°C (-31°F). Travelers should prepare for extremely cold conditions and pack accordingly to ensure a comfortable visit.
In Ongon in December, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.
In Ongon in December, humidity is 86%. With an average temperature of -18°C (1°F), this humidity feels like an icy grip that can chill you to the bone, making travel uncomfortable and potentially hazardous as the cold air saturates with moisture, leading to biting wind chills that freeze exposed skin almost instantly.
In Ongon 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 Ongon, you can visit Hourly UV Index in Ongon.
UV Risk Categories
Weather in Ongon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ongon, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -19°C (-2°F) | 3 mm (0.1 inches) | 89% | low |
| February Weather | -15°C (5°F) | 6 mm (0.2 inches) | 78% | moderate |
| March Weather | -5°C (24°F) | 7 mm (0.3 inches) | 66% | moderate |
| April Weather | 4°C (39°F) | 16 mm (0.6 inches) | 64% | high |
| May Weather | 11°C (52°F) | 22 mm (0.9 inches) | 52% | very high |
| June Weather | 17°C (63°F) | 33 mm (1.3 inches) | 59% | very high |
| July Weather | 19°C (67°F) | 52 mm (2.1 inches) | 63% | very high |
| August Weather | 16°C (62°F) | 78 mm (3.1 inches) | 62% | very high |
| September Weather | 11°C (52°F) | 40 mm (1.6 inches) | 65% | high |
| October Weather | 1°C (34°F) | 15 mm (0.6 inches) | 65% | moderate |
| November Weather | -8°C (17°F) | 12 mm (0.5 inches) | 69% | moderate |
| December Weather | -18°C (1°F) | 5 mm (0.2 inches) | 86% | low |