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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.
Weather Overview for Mykonos. Located about 150 kilometres to the southeast of Athens in the warm Aegean Sea lies the vibrant Greek island of Mykonos. It is one of the most popular of Greece's holiday spots and attracts many people coming for the beaches and nightlife offered by the island and its many attractions.