Is this your crossword clue?
"rainfall" is also used as a crossword clue. If that's what you saw, the answer is often precipitation (13 letters).
Definitions
water falling in drops from vapor condensed in the atmosphere
Word origin
From rain + fall.
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Precipitation total”8 letters
02“Amount of precipitation”8 letters
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