Galissas weather in December 2024

Q: How warm is it in Galissas in December?

Daytime temperatures usually reach 15°C in Galissas in December, falling to 10°C at night.

Q: How sunny is it in Galissas in December?

There are normally 4 hours of bright sunshine each day in Galissas in December - that's 45% of daylight hours.

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

The average sea temperature around Galissas in December is 16°C.

Q: Does it rain in Galissas in December?

There are usually 11 days with some rain in Galissas in December and the average monthly rainfall is 91mm.

Expect 59°F daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Galissas in December. Check more long-term weather averages for Galissas in December before you book your next holiday to Syros in 2024/2025.

59
59°F max day temperature
4
4 hours of sunshine per day
11
11 days with some rainfall
50
50°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
3.6
3.6 inches of monthly rainfall
2
2 (Low) UV index
61
61°F sea temperature

More about Galissas

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The December 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) | Imperial (°F)