New York City weather in September 2025

Expect 24°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in New York City in September. Check more long-term weather averages for New York City in September before you book your next holiday to New York in 2025/2026.

  • 24°C maximum daytime temperature in September in New York City24
    24°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in New York City8
    8 days with some rainfall
  • 16°C minimum night-time temperature in September in New York City16
    16°C min night temperature
  • 12 hours of daylight per day in September in New York City12
    12 hours of daylight per day
  • No heat & humidity in September in New York City0
    No heat & humidity
  • 92 mm monthly rainfall in September in New York City92
    92 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in New York City6
    6 (High) UV index
  • 21°C sea temperature in September in New York City21
    21°C sea temperature

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The September weather guide for New York (New York City) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about New York City

How hot is it in New York City in September?

Daytime temperatures usually reach 24°C in New York City in September, falling to 16°C at night.

How sunny is it in New York City in September?

There are normally 7 hours of bright sunshine each day in New York City in September - that's 59% of daylight hours.

How warm is the sea around New York City in September?

The average sea temperature around New York City in September is 21°C.

Does it rain in New York City in September?

There are usually 8 days with some rain in New York City in September and the average monthly rainfall is 92mm.

What is the chance of a hurricane in New York City in September?

On average less than 1 day in September in New York City is likely to be affected by the passage of one or more tropical storms.

New York City September sunrise & sunset times

Browse the sunrise and sunset times for New York City in September 2025. Select a month to view New York City sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:23 18:28
Monday, 15th September 2025 05:37 18:04
Tuesday, 30th September 2025 05:52 17:39

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