Ermoupolis weather in August 2025

Q: How hot is it in Ermoupolis in August?

Daytime temperatures usually reach 27°C in Ermoupolis in August with moderate heat and humidity, falling to 21°C at night.

Q: How sunny is it in Ermoupolis in August?

There are normally 13 hours of bright sunshine each day in Ermoupolis in August - that's 92% of daylight hours.

Q: How warm is the sea around Ermoupolis in August?

The average sea temperature around Ermoupolis in August is 24°C.

Q: Does it ever rain in Ermoupolis in August?

There is usually 1 day with some rain in Ermoupolis in August and the average monthly rainfall is 2mm.

Expect 27°C daytime maximum temperatures in the shade with on average 13 hours of sunshine per day in Ermoupolis in August based on long-term weather averages. There is usually 1 day with some rainfall and 2 mm of average monthly rainfall in August.

27
27°C max day temperature
13
13 hours of sunshine per day
1
1 day with some rainfall
21
21°C min night temperature
14
14 hours of daylight per day
M
Moderate heat & humidity
2
2 mm of monthly rainfall
9
9 (Very High) UV index
24
24°C sea temperature

More about Ermoupolis

Ermoupolis by month

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

Recommended for Syros

Auto Europe: Best rate gurantee

Sale

Book car hire with the best rate gurantee
Find a cheaper rate Auto Europe will beat it
Browse car rentals across the USA & beyond

Go to Auto Europe deal >>

View all Auto Europe offers

The August 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)