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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.
Weekly Weather Report for Oia, Greece. Looking at the weather in Oia, Greece over the next 7 days, the maximum temperature will be 18â (or 65â) on Wednesday 19th April at around 5 pm. In the same week the minimum temperature will be 9â (or 49â) on Tuesday 18th April at around 11 pm.