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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.
More about Mykonos Town weather in January. The average maximum daytime temperature in Mykonos Town in January is a cool 12Â°C (54Â°F). There are usually 4 hours of bright sunshine each day, which represents 44% of the 10 hours of daylight. The average sea temperature in and around Mykonos Town in January is 16Â°C (61Â°F).