梅雨寒つゆざむ

noun

unseasonably cool weather during the rainy season

Refers to a chilly spell that occurs during the tsuyu (rainy season), typically in June or early July, when temperatures drop below normal.

• 今年ことしの梅雨寒つゆざむは長なが引びいている。

  This year's rainy-season chill is lasting longer than usual.

• 梅雨寒つゆざむで体たい調ちょうを崩くずさないように気きをつけて。

  Be careful not to get sick from the unseasonable cold during the rainy season.