Rainy is a distinctive girls' name in United States, ranking #4154 in 2000 with 30 recorded births. The name reached its all-time peak in 2014 with 31 births ranking #4630. Since 1996, the popularity has increased by 66.7%. In 2000, approximately 1 in every 60,532 girls born was named Rainy. FALLING Recent data shows the name is currently falling.