Syros weather in September 2025

Expect 77°F daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Syros in September. Check more long-term weather averages for Syros in September before you book your next holiday to Syros in 2025/2026.

  • 77°F maximum daytime temperature in September in Syros (Ermoupolis)77
    77°F max day temperature
  • 10 hours of sunshine per day
  • 1 day with some rainfall in September in Syros (Ermoupolis)1
    1 day with some rainfall
  • 66°F minimum night-time temperature in September in Syros (Ermoupolis)66
    66°F min night temperature
  • 12 hours of daylight per day in September in Syros (Ermoupolis)12
    12 hours of daylight per day
  • Low heat & humidity in September in Syros (Ermoupolis)L
    Low heat & humidity
  • 0.5 inches monthly rainfall in September in Syros (Ermoupolis)0.5
    0.5 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in Syros (Ermoupolis)7
    7 (High) UV index
  • 73°F sea temperature in September in Syros (Ermoupolis)73
    73°F sea temperature

More about Syros

Syros by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Syros

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost

TUITUI deal finder

The September weather guide for Syros, represented by Ermoupolis, (Ermoupolis) 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)

Back to top

More about Greece

How hot is it in Syros in September?

Daytime temperatures usually reach 77°F in Ermoupolis, Syros in September with low heat and humidity, falling to 66°F at night.

How sunny is it in Syros in September?

There are normally 10 hours of bright sunshine each day in Ermoupolis, Syros in September - that's 84% of daylight hours.

How warm is the sea around Syros in September?

The average sea temperature around Ermoupolis, Syros in September is 73°F.

Does it ever rain in Syros in September?

There is usually 1 day with some rain in Ermoupolis, Syros in September and the average monthly rainfall is 0.5 inches.

Syros September sunrise & sunset times

Browse the sunrise and sunset times for Syros in September 2025. Select a month to view Syros sunrise and sunset times for the next 12 months. The Syros sunrise and sunset times shown below are for Ermoupolis.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:51 18:49
Monday, 15th September 2025 06:02 18:28
Tuesday, 30th September 2025 06:15 18:05

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^