Fetching details from the dictionary...

(East Asian) rainy season (in Japan, usu. from early June to mid-July)
rain during the rainy season
今年の梅雨は長く続いている。
This year's rainy season is lasting long.
梅雨が明けるといよいよ夏本番だ。
Summer begins when the rainy season ends.
梅雨の季節は洗濯物がなかなか乾かなくて困る。
During the rainy season, it's a problem that laundry won't dry.