PROVERBS and sayingsIt never RAINS but it pours = misfortunes never come singly; If it should RAIN pottage, he would want his dish, said of a wastrel or STAR-GAZER (q.v.). It RAINS by planets, i.e., partially; TO GET OUT OF THE RAIN = to absent oneself, to refrain from meddling. See also CATS-AND-DOGS, RIGHT, &c.
1749. SMOLLETT, Gil Blas [ROUTLEDGE], 18. As IT NEVER RAINS BUT IT POURS, I was in the front of the battle that I might lose no time in learning to stand fire.
1848. DURIVAGE, Stray Subjects, 95. Ham was one of emhe was! He knew sufficient TO GET OUT OF THE RAIN.