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Mykonos: Annual Weather Averages. July is the hottest month in Mykonos with an average temperature of 26Â°C (79Â°F) and the coldest is January at 9Â°C (48Â°F) with the most daily sunshine hours at 14 in July. The wettest month is November with an average of 170mm of rain.
Buses, taxis and small passenger boats provide transport around the island. Timing. During summer (especially in August), Mykonos is one of the most crowded islands in Greece, so be sure to plan your holidays far in advance. To escape the crowds, visit the island during spring or fall.