My wife happened to play Slim Harpo, Muddy Waters and Siegel-Schwall cds in the same block, and this song was on each. As it happens, we have another couple of versions. So, our rainy day in a song.
Slim Harpo (who wrote it) -1957
Rolling Stones, 1964
Siegel-Schwall, 1967-68
Muddy Waters, 1980 (after hearing this, Jagger is reputed to have said why listen to our version when you can listen to Muddy Waters)
Killer Bees, 1976 (had to go to archive.org to get the full length version, so just click)