Mykonos is typically warm in September.

Maximum temperatures go down compared to the previous month from +81°F to +77°F. The minimum temperature also goes down from +75°F to +72°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

September is one of the warmest months in Mykonos, here is the comparison with other months:

Water in Mykonos in September is Comfortable. It varies from +72°F to +76°F, with an average of +74°F. This is almost similar to the air temperature, which averages +77°F.

The water temperature in September is one of the warmest of the entire year:

September weather is still as great as in August. It’s getting colder in September. From +81°F in the day, the average maximum temperature lowers to +77°F. Prepare for more rain. Average rainfall goes from 1 mm to 4 mm. Humidity rises from 70% to 71%. Winds are calmer in comparison to August, going down from 7 m/s to 6 m/s on average. The days becoming less sunny, going from 30 sunny days in August to 25 in September.

Next month (October) brings a further decline in the weather.

The climate in Mykonos in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1983 (+64°F) and the highest in 2021 (+73°F). The driest year was 1989 with only 149 mm of rainfall, and the wettest year was 2003 with 694 mm.

For this page, we’ve looked at the typical weather in Mykonos, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.