- 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
Syros weather in September 2025
Expect 25°C 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.
- 2525°C max day temperature
- 10 hours of sunshine per day
- 11 day with some rainfall
- 1919°C min night temperature
- 1212 hours of daylight per day
- LLow heat & humidity
- 1212 mm of monthly rainfall
- 77 (High) UV index
- 2323°C sea temperature
More about Syros
- Overview
- Best time to visit
- Weather by month
- 5-day weather forecast
- Destinations
- Travel advice
- Deals & discounts
Syros by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Syros
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 / mm) | Imperial (°F / inches)
More about Greece
How hot is it in Syros in September?
Daytime temperatures usually reach 25°C in Ermoupolis, Syros in September with low heat and humidity, falling to 19°C 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 23°C.
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 12mm.
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 |
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
Explore holidays in the sun for less
- Beach holidays
- Family holidays
- City breaks
- Summer holidays
- Winter sun holidays
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- Airport parking deals
- TUI
- Jet2holidays
- easyJet holidays
- Love Holidays
- Black Friday sales
Airport parking
- Manchester Airport
- Stansted Airport
- Bristol Airport
- Luton Airport
- Birmingham Airport
- Edinburgh Airport
- Gatwick Airport
- Glasgow Airport
- Newcastle Airport
Airport lounges
- Manchester Airport
- Birmingham Airport
- Bristol Airport
- Edinburgh Airport
- Glasgow Airport
- Heathrow Airport
- Newcastle Airport
- Stansted Airport
- Gatwick Airport