Galissas weather in January 2025

Q: How warm is it in Galissas in January?

Daytime temperatures usually reach 13°C in Galissas in January, falling to 8°C at night.

Q: How sunny is it in Galissas in January?

There are normally 4 hours of bright sunshine each day in Galissas in January - that's 43% of daylight hours.

Q: How warm is the sea around Galissas in January?

The average sea temperature around Galissas in January is 15°C.

Q: Does it rain in Galissas in January?

There are usually 10 days with some rain in Galissas in January and the average monthly rainfall is 90mm.

Expect 13°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Galissas in January. Check more long-term weather averages for Galissas in January before you book your next holiday to Syros in 2025/2026.

13
13°C max day temperature
4
4 hours of sunshine per day
10
10 days with some rainfall
8
8°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
90
90 mm of monthly rainfall
2
2 (Low) UV index
15
15°C sea temperature

More about Galissas

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The January weather guide for Syros, represented by Galissas, (Galissas) 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)