I know this song, actually there are 3 verses:
Verse 1
Leaves on the trees are turning
yellow, brown and red,
smoke from the bonfire burning
climbing overhead,
Chorus
Here comes autumn bringing the mist and rain,
Summer has gone for another year,
Autumn's here again,
Verse 2
Swallows will soon be going,
flying to the sun,
for they have a way of knowing,
Autumn has begun,
Chorus
Here comes autumn bringing the mist and rain,
Summer has gone for another year,
Autumn's here again,
Verse 3
Look at the Conkers growing,
ripe and shiny brown,
here come the children throwing,
sticks to knock them down
Chorus
Here comes autumn bringing the mist and rain,
Summer has gone for another year,
Autumn's here again,