Argostoli weather in September 2025

Expect 81°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Argostoli in September. Check more long-term weather averages for Argostoli in September before you book your next holiday to Kefalonia in 2025/2026.

  • 81°F maximum daytime temperature in September in Argostoli81
    81°F max day temperature
  • 9 hours of sunshine per day
  • 4 days with some rainfall in September in Argostoli4
    4 days with some rainfall
  • 63°F minimum night-time temperature in September in Argostoli63
    63°F min night temperature
  • 12 hours of daylight per day in September in Argostoli12
    12 hours of daylight per day
  • Moderate heat & humidity in September in ArgostoliM
    Moderate heat & humidity
  • 1.9 inches monthly rainfall in September in Argostoli1.9
    1.9 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in Argostoli7
    7 (High) UV index
  • 77°F sea temperature in September in Argostoli77
    77°F sea temperature

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The September weather guide for Kefalonia (Argostoli) 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)  |  Imperial (°F)

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How hot is it in Argostoli in September?

Daytime temperatures usually reach 81°F in Argostoli in September with moderate heat and humidity, falling to 63°F at night.

How sunny is it in Argostoli in September?

There are normally 9 hours of bright sunshine each day in Argostoli in September - that's 75% of daylight hours.

How warm is the sea around Argostoli in September?

The average sea temperature around Argostoli in September is 77°F.

Does it rain in Argostoli in September?

There are usually 4 days with some rain in Argostoli in September and the average monthly rainfall is 1.9 inches.

Argostoli September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:08 19:08
Monday, 15th September 2025 06:20 18:46
Tuesday, 30th September 2025 06:33 18:22

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