"Rainin' in My Heart" is a song written by James Moore (aka Slim Harpo) and Jerry West (an alias used by J. D. "Jay" Miller) and performed by Harpo.
[1] It was featured on his 1961 album Slim Harpo Sings "Raining in My Heart..."[2] It is not to be confused with the similarly titled Buddy Holly song, "Raining in My Heart".
Note: Al Green co-wrote and recorded a song called "Rainin' in My Heart" on his 2003 album, I Can't Stop (and subsequently recorded as a duet with Willie Nelson on Nelson's 2004 album, Outlaws and Angels).
Certain song databases have mistakenly classified Green's song as a cover of Slim Harpo's "Rainin' in My Heart", written by James Moore (aka Slim Harpo) and Jerry West (aka J.D.
The lyrics of the two songs are completely unrelated except for the title.