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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 is famous for its flamboyant nightlife, but the island also makes for a wonderful family destination if you stay in one of the quieter resorts, such as Agios Ioannis, with its lovely sandy beach beach, immortalised in the film Shirley Valentine (1989).