Reprise of Christmas Joke, Just 4 U

The children at Song Club loved this joke so much it stopped them from being able to think of any others to tell me in return.
The burly Viking Rudolf the Red was looking out of the window at the falling snow.
"Ahhh", he said to his ever-loving wife, "Look at the rain!"
'You are very much mistaken, darling', said his wife, "That is snow!"
He turned to her, pityingly.
"Rudolf the Red knows rain, dear".