Rainy is a distinctive girls' name in United States, ranking #4111 in 1998 with 28 recorded births. The name reached its all-time peak in 2014 with 31 births ranking #4630. Since 1996, the popularity has increased by 55.6%. In 1998, approximately 1 in every 63,103 girls born was named Rainy. FALLING Recent data shows the name is currently falling.