"The Rain Song" is a ballad of over 7 minutes in length. Guitarist Jimmy Page originally constructed the melody of this song at his home in Plumpton, England, where he had recently installed a studio console. A new Vista model, it was partly made up from the Pye Mobile Studio which had been used to record the group's 1970 Royal Albert Hall performance and The Who's Live at Leeds album.
Page was able to bring in a completed arrangement of the melody, for which singer Robert Plant composed some lyrics. These lyrics are considered by Plant himself to be his best overall vocal performance. The song also features a mellotron played by John Paul Jones to add to the orchestral effect, while Page plays a Danelectro guitar.
George Harrison was reportedly the inspiration for "The Rain Song" when he made a comment to Led Zeppelin drummer John Bonham, about the fact that the group never wrote any ballads. In tribute to Harrison, the opening two chords are recognisably borrowed from the first line of his ballad "Something" with The Beatles.
The working title for this track was "Slush," a reference to its easy listening mock orchestral arrangement.
It is the springtime of my lovin'
The second season I am to know-oo-oh
Ya' are the sunlight in my growin'
So little warmth, I've felt before-oo-ore
It isn't hard to feel me glowin'
I watched the fire that grew so low-oo-ooo-oh-oh-oh
It is the summer of my smi-iles
Flee from me, Keepers of the Gloo-oo-oom
Speak to me only with your eye-eye-eyes
It is to you I give this tu-une
Ain't so hard to recogni-i-ize, oh-oh-oh
These things are clear to all from time-to-time
Oo-oo-ooo, oo-oo-oo, oo-OO
Talk, talk, talk, talk
I've felt the coldness of my wint-er-er
I never thought, it would ever go-oo-oh
I cursed the gloom that set upon us, 'pon-us, 'pon-us
But I kno-oh, that I love you so-oo-woe
But I know-oh, that I love you so-oo-oh
These are the seasons of emotion-unh
And like the winds, they rise and fa-oo-al
This is the wonder of devo-oh-tion-unh
I seek the torch, we all must ho-oo-old
This is the mystery of the quotient-quo-oh-tie-unt
Unh, upon us all, upon us all, a little rai-ain must fa-all
It's just a little rain-oh-unh-unh-unh
Woo-oo, yeah-i-yeah-i, yeah-eh-ah!