Last updated: August 22, 2025
In December, the average temperature in Helong, China hovers around -12°C (11°F), with extremes reaching as low as -29°C (-21°F) and peaking at 5°C (42°F). Expect a chilly atmosphere with an average humidity of 70%. Additionally, anticipate a moderate precipitation amount of 14 mm (0.5 in) over the course of about 2 days. Bundle up and prepare for a wintry experience!
In December in Helong, the average temperature is -12°C (11°F). Maximums can reach 5°C (42°F) and minimums can drop as low as -29°C (-21°F). Be prepared for extremely cold temperatures and dress in warm layers if you plan to travel during this month.
In Helong in December, the precipitation amount reaches 14 mm (0.5 in) over a span of 2 days.
In Helong in December humidity is 70%. With an average temperature of -12°C (11°F), this humidity feels like an icy blanket wrapped around you, making travel uncomfortable as the cold air seeps into your bones, and every breath comes with a sharp chill.
In Helong 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 Helong, you can visit Hourly UV Index in Helong.
UV Risk Categories
Weather in Helong varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Helong, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -14°C (7°F) | 8 mm (0.3 inches) | 78% | low |
| February Weather | -11°C (13°F) | 23 mm (0.9 inches) | 75% | moderate |
| March Weather | -1°C (30°F) | 34 mm (1.3 inches) | 70% | high |
| April Weather | 6°C (43°F) | 43 mm (1.7 inches) | 65% | very high |
| May Weather | 12°C (54°F) | 104 mm (4.1 inches) | 72% | very high |
| June Weather | 16°C (62°F) | 118 mm (4.6 inches) | 82% | very high |
| July Weather | 21°C (70°F) | 129 mm (5.1 inches) | 87% | extreme |
| August Weather | 20°C (68°F) | 205 mm (8.1 inches) | 89% | extreme |
| September Weather | 14°C (58°F) | 86 mm (3.4 inches) | 84% | very high |
| October Weather | 6°C (43°F) | 42 mm (1.7 inches) | 83% | high |
| November Weather | -3°C (28°F) | 36 mm (1.4 inches) | 67% | moderate |
| December Weather | -12°C (11°F) | 14 mm (0.5 inches) | 70% | low |