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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.
Check the Weather in Mykonos in August before you book your next holiday. This gives the best indication of the weather in August and includes figures for temperature, sunshine and rainfall. The Mykonos august weather guide shown below is for Mykonos Town. 1  27Â°C max day temperature.