If you're looking for summer vibes, the best time to travel to Syros Island is in July, June and August, when the average temperature reaches 24.61 °C, while July, August and June are the 3 sunniest months of the year, with an average of 196.71 hours.
However, if you prefer colder temperatures, make sure you visit Syros Island during January, February or December to experience an average of 12.94 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during June, January and February, when the average precipitation in Syros Island is 4.33 mm, while the months of January, February and March are drier, with an average of 0 mm.