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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.
Mykonos Weather. The weather in Mykonos, Greece. The weather of Mykonos is similar to the one of the other Cyclades and is typically Mediterranean, with mild winters and hot, dry summers. From April to August, weather is always bright and sunny.