Koroni weather in September 2025

Expect 27°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Koroni in September. Check more long-term weather averages for Koroni in September before you book your next holiday to Peloponnese in 2025/2026.

  • 27°C maximum daytime temperature in September in Koroni27
    27°C max day temperature
  • 9 hours of sunshine per day
  • 3 days with some rainfall in September in Koroni3
    3 days with some rainfall
  • 17°C minimum night-time temperature in September in Koroni17
    17°C min night temperature
  • 12 hours of daylight per day in September in Koroni12
    12 hours of daylight per day
  • Low heat & humidity in September in KoroniL
    Low heat & humidity
  • 27 mm monthly rainfall in September in Koroni27
    27 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Koroni7
    7 (High) UV index
  • 25°C sea temperature in September in Koroni25
    25°C sea temperature

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The September weather guide for Peloponnese (Koroni) 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 Greece

How hot is it in Koroni in September?

Daytime temperatures usually reach 27°C in Koroni in September with low heat and humidity, falling to 17°C at night.

How sunny is it in Koroni in September?

There are normally 9 hours of bright sunshine each day in Koroni in September - that's 76% of daylight hours.

How warm is the sea around Koroni in September?

The average sea temperature around Koroni in September is 25°C.

Does it ever rain in Koroni in September?

There are usually 3 days with some rain in Koroni in September and the average monthly rainfall is 27mm.

Koroni September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:03 19:00
Monday, 15th September 2025 06:14 18:40
Tuesday, 30th September 2025 06:27 18:17

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