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The island of Ios is characterized by a temperate Mediterranean climate, it is the typical climate of the islands of Greece characterized by hot and very dry summers and mild and rainy winters.
Annual rainfall is scarce – the annual average is around 370 mm – and is concentrated in the winter months between November and March. While in the months from June to September it practically never rains.
A short spring characterized by moderate temperatures is followed by a long and hot summer, mitigated in the afternoon by the sea breeze and the breath of the Meltemi, a wind of northern origin typical of the Greek islands that blows constantly during the summer. The island of Ios boasts over 300 sunny days a year.
The average maximum summer temperatures vary between 28 ° C in August and 26 ° C in June and September, in winter the average maximum temperatures vary between 17 ° C and 15 ° C. The average minimum temperatures vary between 22 ° C in the summer months and 10 ° C and 12 ° C in the winter months.
The sea water temperature remains above 22 ° C from June to October, reaching the maximum temperature of 25 ° C in August.
WHEN TO GO TO IOS
To visit the island of Ios the months from April to October are excellent, for the sea life those from June to September are preferable.
THE CLIMATE OF IOS: CLIMATE TABLES
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| IOS (CYCLADES) (3 meters) | ||||
| Month | Average low (°C) | Average high (°C) | Precip. (mm) | Precip. days |
| January | 10,0 | 15,0 | 71 | |
| February | 10,0 | 15,0 | 58 | |
| March | 11,0 | 16,0 | 50 | |
| April | 13,0 | 20,0 | 17 | |
| May | 16,0 | 23,0 | 10 | |
| June | 20,0 | 26,0 | 2 | |
| July | 22,0 | 27,0 | 0 | |
| August | 22,0 | 28,0 | 2 | |
| September | 20,0 | 26,0 | 5 | |
| October | 18,0 | 24,0 | 40 | |
| November | 15,0 | 20,0 | 48 | |
| December | 12,0 | 17,0 | 68 | |
| YEAR | 371 |
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| IOS (CYCLADES) | |
| Month | Sea Water Temperature °C |
| January | 16 |
| February | 15 |
| March | 16 |
| April | 16 |
| May | 19 |
| June | 22 |
| July | 24 |
| August | 25 |
| September | 24 |
| October | 23 |
| November | 20 |
| December | 17 |
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