Skiathos is characterized by a Mediterranean climate with hot and dry summers and is the island that is less affected by the strong wind Meltemi.
The good weather is prolonged until the month of October when the first rains affect the island and temperatures often reach 29 degrees and never fall below 20.
July and August are the months in which the temperatures touch the greater peaks but during the night the air tends to refresh itself even if of little.
The sea that bathes the island of Skiathos is ideal for swimming from May to September when the more than 10 hours of sunshine per day make it particularly hot.
The hottest months of the year in Skiathos are June, July and August, when the monthly average temperature reaches 29 °C, while the coldest months of February and January the thermometer drops up to 2 °C.
In Skiathos rainiest months of the year are January and December during which monthly rainfall average reaches 95 mm. On the other side, driest months are June, August and July when the average rainfall is reduced to 22 mm per month.
May, June, August and July are sunniest months of the year. During that months, from sunrise to sunset there are 12 total light hours in Skiathos. In February, December and January daylight hours are reduced to 4.
Months of the year when sea water is warmer are July, September and August, average temperature is around 25 °C.