Last updated: August 23, 2025
In Onagawa Cho, Japan, the average temperature in December hovers around 6°C (43°F). You might experience chilly spells with a minimum temperature dropping to -2°C (29°F), while the mercury can rise to a pleasant 16°C (62°F). Expect 63 mm (2.5 in) of precipitation spread over 12 days, accompanied by an average humidity level of 80%. Perfect for those who enjoy a brisk, refreshing atmosphere!
In December in Onagawa Cho, the average temperature is 6°C (43°F). The maximum can reach 16°C (62°F), while the minimum can drop as low as -2°C (29°F). Travelers should be prepared for chilly weather and pack accordingly for a mix of cool and possibly frosty conditions.
In Onagawa Cho in December, the total precipitation amount reaches 63 mm (2.5 in) over the course of 12 days.
In Onagawa Cho in December humidity is 80%. With an average temperature of 6°C (43°F), this humidity feels like a chilly, damp embrace that can make outdoor exploration quite uncomfortable, often leaving travelers feeling clammy and cold despite the relatively mild temperature.
In Onagawa Cho in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Onagawa Cho, you can check the information here.
UV Risk Categories
Weather in Onagawa Cho varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Onagawa Cho, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (39°F) | 47 mm (1.8 inches) | 80% | moderate |
| February Weather | 4°C (39°F) | 42 mm (1.6 inches) | 79% | moderate |
| March Weather | 6°C (44°F) | 107 mm (4.2 inches) | 77% | high |
| April Weather | 9°C (49°F) | 114 mm (4.5 inches) | 75% | very high |
| May Weather | 14°C (57°F) | 110 mm (4.3 inches) | 80% | very high |
| June Weather | 17°C (63°F) | 96 mm (3.8 inches) | 87% | very high |
| July Weather | 21°C (71°F) | 173 mm (6.8 inches) | 92% | very high |
| August Weather | 24°C (75°F) | 167 mm (6.6 inches) | 92% | extreme |
| September Weather | 22°C (71°F) | 141 mm (5.5 inches) | 86% | very high |
| October Weather | 17°C (63°F) | 214 mm (8.4 inches) | 82% | high |
| November Weather | 12°C (53°F) | 44 mm (1.7 inches) | 79% | moderate |
| December Weather | 6°C (43°F) | 63 mm (2.5 inches) | 80% | moderate |