Naples weather in September 2025

Expect 26°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Naples in September based on long-term weather averages. There is usually 9 days with some rainfall and 74 mm of average monthly rainfall in September.

  • 26°C maximum daytime temperature in September in Naples26
    26°C max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in September in Naples9
    9 days with some rainfall
  • 16°C minimum night-time temperature in September in Naples16
    16°C min night temperature
  • 12 hours of daylight per day in September in Naples12
    12 hours of daylight per day
  • Low heat & humidity in September in NaplesL
    Low heat & humidity
  • 74 mm monthly rainfall in September in Naples74
    74 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Naples6
    6 (High) UV index
  • 24°C sea temperature in September in Naples24
    24°C sea temperature

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The September weather guide for Campania (Naples) 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 the Campania

How hot is it in Naples in September?

Daytime temperatures usually reach 26°C in Naples in September with low heat and humidity, falling to 16°C at night.

How sunny is it in Naples in September?

There are normally 8 hours of bright sunshine each day in Naples in September - that's 62% of daylight hours.

How warm is the sea around Naples in September?

The average sea temperature around Naples in September is 24°C.

Does it rain in Naples in September?

There are usually 9 days with some rain in Naples in September and the average monthly rainfall is 74mm.

Naples September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:30 18:35
Monday, 15th September 2025 05:44 18:12
Tuesday, 30th September 2025 05:59 17:47

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