Temperature In Japan In December 2025. Here you can find all information about the weather in japan in december: Weather ☀ ⛅ tokyo ☀ ⛅ december ☀ ⛅ information on temperature, sunshine hours, water temperature & rainfall in december for tokyo.
The average temperature at the beginning of december in japan is 12 ° c. The average temperature in japan during december ranges from 3°c to 12°c (37°f to 54°f), depending on the region.