Thira weather in September 2025

Expect 25°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Thira in September. Check more long-term weather averages for Thira in September before you book your next holiday to Santorini in 2025/2026.

  • 25°C maximum daytime temperature in September in Thira25
    25°C max day temperature
  • 10 hours of sunshine per day
  • 1 day with some rainfall in September in Thira1
    1 day with some rainfall
  • 20°C minimum night-time temperature in September in Thira20
    20°C min night temperature
  • 12 hours of daylight per day in September in Thira12
    12 hours of daylight per day
  • Low heat & humidity in September in ThiraL
    Low heat & humidity
  • 13 mm monthly rainfall in September in Thira13
    13 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Thira7
    7 (High) UV index
  • 24°C sea temperature in September in Thira24
    24°C sea temperature

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The September weather guide for Santorini (Thira) 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 Thira in September?

Daytime temperatures usually reach 25°C in Thira in September with low heat and humidity, falling to 20°C at night.

How sunny is it in Thira in September?

There are normally 10 hours of bright sunshine each day in Thira in September - that's 83% of daylight hours.

How warm is the sea around Thira in September?

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

Does it ever rain in Thira in September?

There is usually 1 day with some rain in Thira in September and the average monthly rainfall is 13mm.

Thira September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:50 18:46
Monday, 15th September 2025 06:01 18:26
Tuesday, 30th September 2025 06:13 18:03

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