Tokyo Weather June 2025. The first month of the summer, june, is a warm month in shinjuku, japan, with an average temperature fluctuating between 19.8°c (67.6°f) and 23.4°c (74.1°f). Our weather forecast can give you a great sense of what weather to expect in japan in june 2025.
Temperatures will be pleasant, averaging in the high 70s (low 20s c) with higher. Are you planning a holiday with hopefully nice weather in tokyo in june 2025?