Atlantic City weather in September 2025

Expect 24°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Atlantic City in September. Check more long-term weather averages for Atlantic City in September before you book your next holiday to New Jersey in 2025/2026.

  • 24°C maximum daytime temperature in September in Atlantic City24
    24°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Atlantic City8
    8 days with some rainfall
  • 16°C minimum night-time temperature in September in Atlantic City16
    16°C min night temperature
  • 12 hours of daylight per day in September in Atlantic City12
    12 hours of daylight per day
  • No heat & humidity in September in Atlantic City0
    No heat & humidity
  • 74 mm monthly rainfall in September in Atlantic City74
    74 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Atlantic City7
    7 (High) UV index
  • 21°C sea temperature in September in Atlantic City21
    21°C sea temperature

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The September weather guide for New Jersey (Atlantic 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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How hot is it in Atlantic City in September?

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

How sunny is it in Atlantic City in September?

There are normally 8 hours of bright sunshine each day in Atlantic City in September - that's 60% of daylight hours.

How warm is the sea around Atlantic City in September?

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

Does it rain in Atlantic City in September?

There are usually 8 days with some rain in Atlantic City in September and the average monthly rainfall is 74mm.

What is the chance of a hurricane in Atlantic City in September?

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

Atlantic City September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:26 18:28
Monday, 15th September 2025 05:39 18:06
Tuesday, 30th September 2025 05:53 17:41

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