According to the search results, the day with the highest rainfall in New York City was September 23, 1882, when 8.28 inches of rainfall were recorded. However, the search results also provide information on other days with high rainfall in New York City. For example, on August 13-14, 2014, 13.57 inches of rain were observed at the Islip Macarthur Airport, which is the all-time record for rain in a 24-hour period in New York State. Additionally, on August 21-22, 2021, Tropical Storm Henri caused 8.05 inches of rain to fall in Central Park in just 36 hours, which is almost two months worth of rain in a day and a half. The search results also provide information on the average number of days with measurable precipitation in New York City, which is around 120 days per year.