Last updated: August 23, 2025
In Mombetsu, Japan, the average temperature in December hovers around -3°C (26°F), creating a crisp chill in the air. Expect minimums dipping to -15°C (5°F), while the maximum can reach a mild 12°C (55°F). With an average precipitation of 55 mm (2.2 in) over approximately 12 days, it's wise to keep an umbrella handy. Additionally, the average humidity level is a notable 82%, adding to the overall brisk atmosphere.
In December in Mombetsu, the average temperature is -3°C (26°F), with a maximum that can reach 12°C (55°F) and a minimum that can drop as low as -15°C (5°F). Be prepared for chilly weather and pack accordingly if you plan to travel during this time.
In Mombetsu in December, the total precipitation amount is 55 mm (2.2 in) over a span of 12 days.
In Mombetsu in December, humidity is 82%. With an average temperature of -3°C (26°F), this humidity feels like an uncomfortable chill that makes traveling outside feel more biting and penetrating, as the cold damp air clings to your skin, intensifying the cold sensation and making even short excursions feel more daunting.
In Mombetsu 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 Mombetsu, you can visit Hourly UV Index in Mombetsu.
UV Risk Categories
Weather in Mombetsu varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mombetsu, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 57 mm (2.2 inches) | 87% | low |
| February Weather | -6°C (21°F) | 65 mm (2.5 inches) | 86% | moderate |
| March Weather | -1°C (31°F) | 77 mm (3.0 inches) | 85% | moderate |
| April Weather | 5°C (42°F) | 60 mm (2.4 inches) | 85% | high |
| May Weather | 12°C (53°F) | 97 mm (3.8 inches) | 88% | very high |
| June Weather | 14°C (58°F) | 94 mm (3.7 inches) | 88% | very high |
| July Weather | 19°C (67°F) | 105 mm (4.1 inches) | 93% | very high |
| August Weather | 19°C (67°F) | 150 mm (5.9 inches) | 95% | very high |
| September Weather | 16°C (62°F) | 81 mm (3.2 inches) | 88% | high |
| October Weather | 10°C (51°F) | 128 mm (5.0 inches) | 80% | moderate |
| November Weather | 4°C (39°F) | 83 mm (3.3 inches) | 78% | moderate |
| December Weather | -3°C (26°F) | 55 mm (2.2 inches) | 82% | low |