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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 in Mykonos Town in January 2018. Check the weather in Mykonos Town in January based on long-term weather averages before you book your next holiday to Mykonos in 2018. Expect daytime temperatures to reach 12Â°C with on average 4 hours of sunshine per day in Mykonos Town in January.