Paul Grimm was born in South Africa, and came to America near the turn of the century. When he was 18, he won a scholarship to study art in Germany at the Dusseldorf Royal Academy.
He moved to Hollywood in 1919, and worked painting backdrops for movie sets, and then on to Palm Springs in 1932. There he joined the society of desert painters, counting Edgar and Elsie Payne and Jimmy Swinnerton among his friends.