The weather ratio in December in Tokyo (Japan) comprises 52% clear and sunny days, 26% partly cloudy days, 6% cloudy days, and 16% rainy days. Tokyo has many clear and sunny days in December. The average temperature in Tokyo in December is 12°C. The highest temperature is 12°C, the lowest temperature is 3°C, and the temperature doesn't change much. There are many days on which the cloud coverage is minimal and the sunlight shines through strongly, It is, on average, a windy place.