Santorini weather in December

December is one of the least pleasant months in Santorini: highs of 16°C (61°F) and about 87 mm (3.4 in) of rain on average. Nights average 14°C (57°F) and cloud cover 61% (NASA POWER, 2001–2025 averages). The sea averages 19°C (67°F). It is the 2nd wettest month of the year and the 4th coolest. Compared with November, it is cooler and wetter; January brings highs of 15°C (58°F) and 96 mm (3.8 in) of rain.

Is December a good time to visit Santorini?

least pleasant month Weather score 61/100.

December is one of the least pleasant months for weather in Santorini. For better conditions, consider May–Sep.

See Santorini's sky and forecast now

Does it rain a lot in Santorini in December?

Some rain is normal: about 87 mm (3.4 in) falls in an average December. It is the 2nd wettest month of the year.

How warm is Santorini in December?

Days average 16°C (61°F) and nights 14°C (57°F).

Santorini weather by month

Month	High	Low	Rain	Cloud	Sea	Weather
January	15°C (58°F)	13°C (55°F)	96 mm	61%	18°C (65°F)	least pleasant
February	15°C (58°F)	13°C (55°F)	81 mm	60%	18°C (64°F)	least pleasant
March	16°C (60°F)	14°C (57°F)	44 mm	51%	18°C (64°F)	fair
April	18°C (64°F)	15°C (60°F)	26 mm	45%	18°C (64°F)	fair
May	21°C (69°F)	18°C (65°F)	19 mm	34%	20°C (67°F)	best
June	25°C (76°F)	22°C (72°F)	5 mm	16%	23°C (73°F)	best
July	27°C (80°F)	24°C (75°F)	2 mm	9%	25°C (76°F)	best
August	27°C (81°F)	25°C (76°F)	2 mm	8%	26°C (79°F)	best
September	25°C (77°F)	23°C (73°F)	18 mm	19%	25°C (77°F)	best
October	22°C (72°F)	20°C (68°F)	44 mm	36%	23°C (73°F)	fair
November	19°C (66°F)	17°C (63°F)	64 mm	51%	21°C (70°F)	fair
December	16°C (61°F)	14°C (57°F)	87 mm	61%	19°C (67°F)	least pleasant

Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated Oct 31, 2026. How we rate months