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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.
The two most common elements of climate for which Mykonos is famous are sunshine and wind. Rainfall is infrequent, generally falling between the months of February and March, allowing the sun to shine for as many as three hundred days of the year. Because of this arid condition natural vegetation is limited.