There is a bootleg floating around in which Paul is playing this song to someone and 
yelling out the chords as he goes.  I simply listened to Paul and wrote down the chords!  
It's that easy!  Enjoy this song.  I love it.  :)

E
Rain in the forest
E
Rain on the trees
E               A
Raining down on me
C                   E
Rainclouds hide the sun
C                   E
Rainclouds hide the sun

E
Clouds in the valley
E
Clouds in the sky
E                       A
Clouds, please, pass me by

D        G      D               G
Sail the ocean, sail across the sea
D      G       D      G
Send a card to me
D            G
Wind's gonna blow
D          Em
And if you go
C                 A
Leave the sun for me

              E
Talkin' 'bout sun in the desert
E
Sun in my ears
E               A
Sun dries up my tears
C                   E
Rainclouds hide the sun
C                   E
Rainclouds hide the sun

E E

- Solo -
A
D G D G
D G D G
D G D Em
C   A

E
Rain in the forest
E
Rain on the trees
E               A
Raining down on me
C                   E
Rainclouds hide the sun, pretty woman, in the morning,
C                   E
Rainclouds hide the sun

C           E
Rain in the forest (rainclouds hide the sun)
C           E
Rain on the trees (rainclouds hide the sun)
C                     E
Rainclouds hide the sun