There are a few possibilities for why you might be thinking this:
* Misremembering: You might be thinking of a similar quote or image from the novel. The book *does* describe the rain as a cleansing and invigorating force, particularly in the scene where Montag escapes to the river.
* Similar Quotes: Other authors have used similar imagery. For instance, the novel *The Grapes of Wrath* by John Steinbeck features a line about the taste of rain after a long drought.
* Popular Culture: It's possible the phrase has become associated with the novel through fan interpretations, adaptations, or discussions about its themes.
If you can recall any other details about the context of the quote, it might help to pinpoint its origin.