Not good for picnics (5)

I believe the answer is:

rainy

(Other definitions for rainy that I've seen before include "The day one saves for" , "Save your money for this damp day" , "With water falling outside" , "Pluvial" , "Save your money for a . . . . . day - to buy an umbrella?" .)

I've seen this clue in the Newsday.

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