Japan Weather: Temperatures in June
Sapporo, Miyagi, Niigata, Tokyo, Yokohama, Shizuoka, Osaka, Kobe, Oita
Japan in Summer 日本の夏
The mercury starts to rise at the beginning of June with the onset of the rainy season and July, August and September can be very hot and sticky with temperatures consistently over 30 degrees Centigrade or even 35 degrees Centigrade. Northern Honshu (Tohoku) and Hokkaido offer welcome respite from the heat and humidity in summer. Large Japanese cities suffer from a heat island effect due to the use of air-conditioners and the overall lack of green spaces. Average summer temperatures have been on the rise in the past few years with the number of days over 35 degrees Centigrade increasing each year.