New York City Weather in September
Typical weather, rainfall, and packing tips for New York City in September
United States · September
New York City Weather in September
September weather in New York City averages 20°C with 8 rain days and 62% humidity. Comfortable temperatures.
Typical Weather in New York City in September
Based on 30-year historical averages.
Temperature
Conditions
What to Expect in September
- 1Daytime highs around 23°C, dropping to 16°C at night.
- 2Expect 8 rain days — rain is occasional.
- 3Humidity sits at 62% — comfortable.
- 47 hours of sunshine per day on average.
- 5UV index of 5 — moderate sun protection recommended.
What to Pack for New York City in September
Best Activities for September Weather
Outdoor sightseeing
September is ideal for walking tours and outdoor attractions in New York City.
Indoor attractions
Mix indoor and outdoor experiences for a balanced itinerary.
Food and culture
Autumn seasonal dishes and local festivals make September culturally rich.
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Frequently Asked Questions
How we work this out
Temperature and rainfall figures are 30-year meteorological averages. Crowd levels come from national tourism arrival data. Price bands reflect mid-range accommodation and economy flights from major long-haul cities, sampled quarterly.
Last updated 18 July 2026 · Written by the Holicay travel team