APRIL SNOW   Sigmund Romberg was born in Europe and came out of the European operetta tradition. In America, he was a successful composer of musicals. April Snow was written with that excellent lyricist Dorothy Fields for 1947's Up In Central Park. 
Tomorrow marks the beginning of April and the true spring season.
This song tells of a love "That's Light and swift as the April Snow." It comes and goes very quickly with no lasting qualities. 
Sung by the HI LO'S, that pioneering vocal group founded by the brilliant arranger Gene Puerling, the performance is also very light and swift, just like an April Snow.

 https://youtu.be/CrFdf5O6w68