average temperature in japan in june
Weather in Tokyo in June. The average maximum daytime temperature in Tokyo in June is a warm 25Â°C (77Â°F) with low heat & humidity. There are usually 4 hours of bright sunshine each day, which represents 28% of the 15 hours of daylight. The average sea temperature in and around Tokyo in June is 21Â°C (70Â°F). Expect 181mm (7.1 inches) of rainfall across the whole of June with 20 days with some rain falling. Maximum UV levels will be very high (10 UV index) at midday when the skies are clear.