April is the rainiest month in New York with 11.2 days of rain, and September is the driest month with only 8.3 rainy days. There are 118.8 rainy days annually in New York, which is less rainy than most places in New York. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.