If you're looking for summer vibes, the best time to travel to Kos is in July, August and June, when the average temperature reaches 25.44 °C, while July, August and June are the 3 sunniest months of the year, with an average of 197.97 hours.
However, if you prefer colder temperatures, make sure you visit Kos during January, February or December to experience an average of 13.16 °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, July and August, when the average precipitation in Kos is 3.82 mm, while the months of January, February and March are drier, with an average of 0 mm.