you don't need a weatherman to know which way the wind blows

Definition from Wiktionary, the free dictionary
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English[edit]

Etymology[edit]

From a line in a Bob Dylan song, Subterranean Homesick Blues

Proverb[edit]

you don't need a weatherman to know which way the wind blows

  1. You don't need an expert to tell you what you already know.