Rainy is a distinctive girls' name in United States, ranking #5077 in 2005 with 26 recorded births. The name reached its all-time peak in 2014 with 31 births ranking #4630. Since 1996, the popularity has increased by 44.4%. In 2005, approximately 1 in every 71,065 girls born was named Rainy. FALLING Recent data shows the name is currently falling.