[Photo] Des trains pas comme les autres… Transports. A voir. Escalade. Hébergements. Vélo. When to travel to Japan - Travel Weather. The tables list average daytime high and nighttime low temperatures and average percentages of sunny and rainy days for selected cities.
A rainy day is defined as a day on which at least 1 mm of rain falls, while a sunny day is defined as a day on which the sun shines at least 40 percent during daytime. (Source: Japan Meteorological Agency)