Map from Google - Ios

At Ios, belonging to the Cyclades Islands, and in the nearby island of Sikinos, the climate is Mediterranean, with mild and rainy winters, and warm and sunny summers. The average temperature of January is 10.5 °C (51 °F), that of July is 24 °C (75 °F).
Here are the average temperatures.
Average temperatures - Ios
IosJanFebMarAprMayJunJulAugSepOctNovDec
IosJFMAMJJASOND
Min (°C)889121519212119161310
Max (°C)131315182226272624211815
Min (°F)464648545966707066615550
Max (°F)555559647279817975706459

The island is windy, and in summer it is cooled by a frequent wind blowing from the north. The wind has been exploited for centuries by windmills, while in recent times the waves generated by the wind are appreciated by surfers, especially on the north coast.
Precipitation follows the Mediterranean pattern, so it is concentrated from October to March, and is not abundant, since it amounts to about 500 millimetres (20 inches) per year, and this is confirmed by the aridity of the landscape. In summer it practically never rains.
Here is the average precipitation.
Average precipitation - Ios
IosJanFebMarAprMayJunJulAugSepOctNovDecYear
IosJFMAMJJASONDY
Prec. (mm)1007060251552212506595503
Prec. (in)3.92.82.410.60.20.10.10.522.63.719.8
Days1197531002571161

The interior of the island is occupied by hills, whose highest point, Pyrgos, reaches 711 metres (2,333 feet).

Winter, from December to mid-March, is mild, quite rainy and windy. The wind, frequent and sometimes intense, exacerbates the feeling of cold. Sometimes, cold air from the Balkan Peninsula can arrive here, so that there can be cold days, with highs below 10 °C (50 °F), and sometimes even snow can fall.

Spring, from mid-March to May, is mild and sunny, with the rain gradually becoming more rare, and also quite windy. In mid-May the Meltemi starts to blow, a persistent wind, cool and dry, blowing from the north for a few days in a row, especially in the daytime, but sometimes even at night.

Summer, from June to mid-September, is warm and sunny, but also windy. The Meltemi blows for long periods, especially in July and August, and is stronger in the afternoon, but can insist also in the evening. With this wind, the maximum temperature remains almost always below 30 °C (86 °F), and even in the hottest periods, when in other parts of Greece the temperature can touch or exceed 40 °C (104 °F), here it generally doesn't go over 34/35 °C (93/95 °F).

Autumn, from mid-September to November, is initially warm and sunny, but gradually becomes cooler and rainier. Autumn too is windy, because of the southern wind, brought by low pressure systems coming from the Atlantic Ocean or the Mediterranean Sea.

The amount of sunshine in Ios is great in summer, when blue skies prevail, while it's not high from November to February, when the sky is often cloudy, although sunny days may occur also in midwinter.

Mylopota beach

The temperature of the sea is never very high, however, it reaches a maximum of 23/24 °C (73/75 °F) from July to September; in June it's still a bit cool, about 21 °C (70 °F).
Here are the average sea temperatures.
Sea temperature - Ios
IosJanFebMarAprMayJunJulAugSepOctNovDec
IosJFMAMJJASOND
Sea (°C)161515161821232423221917
Sea (°F)615959616470737573726663


The best time to go to Ios for beach life is summer, from June to mid-September.
It's better to bring a sweatshirt for cool evenings, which occur mainly in June, but given the intensity of the wind, those who are sensitive to cold may feel a bit cool even in July and August, and therefore can properly equip themselves also in these months.
For excursions, the spring is fine, in April and May, but since it's almost never very hot, normally you can stroll through the island in summer as well.

Back to the Cyclades Islands.