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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.
Hi There ! Been to Mykonos in October for the last 10 years or so and we think its one of the best times to go !!! We usually leave the island around the12/ 15 th October and the weather has been great every time bar the odd bit of cloud now and again .