National Holiday: None
Major Events: None
Weather: Mostly rain (rains 181mm per month)
Ave. temperature and humidity of Tokyo: 21.5 degrees C, 75%
June in Japan is the rain season called "Tusu, 梅雨." Tsuyu means plum rain. It was name because Japanese plum fruit during this rain season. One out of three days will be rain in June. It is called Minazuki which means no water left in the heaven.
During the "Tsuyu," Ajisai flowers will bloom. Ajisai is very beautiful flower with rain. From So, when you travel Japan in June, don't forget to bring umbllera or rain coat. June Japanese summer starts.
It's not so hot in June, but people start changing outfits from apring to summer.