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While you're reading this thread, play that song...
Today was a rather shitty day in my area. It rained and poured for what seems like the 500th day in a row. While driving home, I had a chance to just sit and relax and listen to some tunes, and this song came on. (Not this xact version, but you know) It may not be the "perfect" rainy day song, but the tone of the song fit really well with the mood, and the vocals aren't loud and over done, so you can chill while listening to the song.
What do you think is the best rainy day song?