Rainy is a distinctive girls' name in United States, ranking #6501 in 2007 with 21 recorded births. The name reached its all-time peak in 2014 with 31 births ranking #4630. Since 1996, the popularity has increased by 16.7%. In 2007, approximately 1 in every 91,545 girls born was named Rainy. FALLING Recent data shows the name is currently falling.