Last updated: August 23, 2025
In Rikubetsu, Japan, the average temperature in December hovers around -5°C (24°F), with temperatures ranging from a chilly -20°C (-3°F) as the minimum to a milder 11°C (53°F) at the maximum. Expect 52 mm (2.1 in) of precipitation spread over 8 days, and prepare for the air to be quite damp, with an average humidity of 79%.
In December in Rikubetsu, the average temperature is -5°C (24°F), with maximums reaching 11°C (53°F) and minimums dropping as low as -20°C (-3°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both chilly and milder days.
In Rikubetsu in December, the total precipitation amount is 52 mm (2.1 in) over the course of 8 days.
In Rikubetsu in December, humidity is 79%. With an average temperature of -5°C (24°F), this humidity feels like an icy grip that makes the cold air bite even more sharply, requiring travelers to bundle up warmly and prepare for a chilling experience outdoors.
In Rikubetsu 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 Rikubetsu, you can visit Hourly UV Index in Rikubetsu.
UV Risk Categories
Weather in Rikubetsu varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Rikubetsu, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (17°F) | 50 mm (2.0 inches) | 84% | low |
| February Weather | -8°C (18°F) | 49 mm (1.9 inches) | 83% | moderate |
| March Weather | -2°C (29°F) | 88 mm (3.5 inches) | 83% | high |
| April Weather | 4°C (40°F) | 78 mm (3.1 inches) | 83% | very high |
| May Weather | 11°C (51°F) | 90 mm (3.6 inches) | 86% | very high |
| June Weather | 14°C (57°F) | 104 mm (4.1 inches) | 88% | very high |
| July Weather | 18°C (65°F) | 83 mm (3.3 inches) | 93% | very high |
| August Weather | 18°C (65°F) | 147 mm (5.8 inches) | 96% | very high |
| September Weather | 15°C (59°F) | 93 mm (3.6 inches) | 89% | very high |
| October Weather | 9°C (49°F) | 136 mm (5.4 inches) | 83% | moderate |
| November Weather | 3°C (37°F) | 77 mm (3.0 inches) | 80% | moderate |
| December Weather | -5°C (24°F) | 52 mm (2.1 inches) | 79% | low |