The rainy season (tsuyu) period in Japan; a time of prolonged rain and high humidity when things like laundry don't dry easily.
梅雨時は部屋が湿っぽくなりやすいので換気を忘れないでください。
During the rainy season, rooms easily become damp, so don't forget to ventilate.
紫陽花は梅雨時によく見かける花だ。
Hydrangeas are flowers often seen during the rainy season.
梅雨時はカビが生えやすいから除湿機を使おう。
Because mold easily grows during the rainy season, let's use a dehumidifier.