Seth, here it is. Found it at a good Christmas song site, http://www.xmasfitz.com/.
If It Doesn't Snow On Christmas
Gene Autry

Santa works all day in his workshop
Making lots of games and toys
Then one day, he hops in his sleigh
To bring them to the girls and boys
Santa's just as nice as he can be
There's just one little thing that worries me

If it doesn't snow on Christmas
How is Santa goin' to use his sleigh
In case of rain, will there be a train
That'll speed him on his way
If it doesn't snow on Christmas
How will Santa get around to us
If he breaks down on his way to town
Will they let him use a bus

I sent him a nice long letter
And I hope it's not in vain
I'd really feel much better
If I knew he could fly a plane

People say he has eight reindeer
For the sleigh he's driving here
But how'll he go, if it doesn't snow
On Christmas this year

[Interlude]

If it doesn't snow on Christmas
How is Santa goin' to use his sleigh
In case of rain, will there be a train
That'll speed him on his way
If it doesn't snow on Christmas
How will Santa get around to us
If he breaks down on his way to town
Will they let him use a bus

I sent him a nice long letter
And I hope it's not in vain
I'd really feel much better
If I knew he could fly a plane

People say he has eight reindeer
For the sleigh he's driving here
But how'll he go, if it doesn't snow
On Christmas this year