Have You Ever Seen the Rain? Songtext
von Creedence Clearwater Revival

and unhappy. Thus the line "Have you ever seen the rain, coming down on a sunny day." The band split in October the following year."

Tom Fogerty left the group in early 1971, after this album was released."
Wikipedia:
"John Fogerty himself has said in interviews that the song is about rising tension within CCR and the imminent departure of his brother Tom from the band. Fogerty stated that the song was written about the fact that they were on the top of the charts, and had surpassed all of their wildest expectations of fame and fortune. They were rich and famous, but somehow all members of the band at the time were depressed

"songfacts.com":
This song is John Fogerty's take on the imminent departure of his brother Tom from the band, and the overall tension in the group at a time when they should have been enjoying their success. The line, "I want to know - have you ever seen the rain comin' down on a sunny day?" refers to Tom leaving while CCR was at its commercial zenith. The flip side of this single, "Hey Tonight," is John reassuring the band that all would go well despite the adversity.