Athens weather in September 2025

Expect 28°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Athens in September. Check more long-term weather averages for Athens in September before you book your next holiday to Greece in 2025/2026.

  • 28°C maximum daytime temperature in September in Athens28
    28°C max day temperature
  • 9 hours of sunshine per day
  • 2 days with some rainfall in September in Athens2
    2 days with some rainfall
  • 18°C minimum night-time temperature in September in Athens18
    18°C min night temperature
  • 12 hours of daylight per day in September in Athens12
    12 hours of daylight per day
  • Moderate heat & humidity in September in AthensM
    Moderate heat & humidity
  • 13 mm monthly rainfall in September in Athens13
    13 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Athens7
    7 (High) UV index
  • 25°C sea temperature in September in Athens25
    25°C sea temperature

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The September weather guide for Greece (Athens) 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 Athens in September?

Daytime temperatures usually reach 28°C in Athens in September with moderate heat and humidity, falling to 18°C at night.

How sunny is it in Athens in September?

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

How warm is the sea around Athens in September?

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

Does it ever rain in Athens in September?

There are usually 2 days with some rain in Athens in September and the average monthly rainfall is 13mm.

Athens September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:55 18:54
Monday, 15th September 2025 06:07 18:33
Tuesday, 30th September 2025 06:20 18:09

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