January is usually the coldest month of the year in the Greek Islands. Mid-winter weather features frequent gray skies and rain—perfect for relaxing over ouzos and warm local cheer in a taberna. The ocean waters are too cool to swim, and the Cyclades isles can be quite windy.
What to wear in Mykonos in winter?
However, during the winter in Mykonos, you'll need sneakers, a wind jacket, and clothes that will keep you warm. It doesn't have to be a ski jacket – remember that temperatures here rarely go below 50°F (10°C). Keep in mind the time of the year and try to keep an eye on the weather forecast.