Weather in Mykonos in October

How October compares

October is the 5th warmest month of the year in Mykonos and ranks 98th of 134 destinations we compare for October - see where else is hot in October. Within Greece it is 32nd of 44 (Greece in October). Against London's average high of 14.6°C in October, Mykonos is 6.5°C warmer by day and 10.0°C warmer at night.

Daytime and night-time in October

The typical October day in Mykonos peaks at 21.1°C, but that is an average: the warmest 10% of days reach 23.7°C or more. Roughly 1 in 33 days top 25°C. Nights average 18.4°C; one night in ten drops to 15.2°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest October day here reached 29.1°C (2020-10-05) and the coldest night 11.0°C (2003-10-29).

Rain in October

Some rain (4-8 rainy days): about 4 days with 1 mm or more, 31 mm in total. Year to year it varies a lot - the wettest October was 1994 with 145 mm, the driest 1993 with 0 mm. Humidity averages 73%.

Sea temperature in October

The sea averages 21.4°C - bracing (18-22°c). Depending on the year it ranges from 20.4°C to 22.3°C. For the warmest sea here, come in August (24.3°C).

Sunshine and daylight

Around 7.6 hours of sunshine a day (estimated from cloud cover), 11.0 hours of daylight: the sun rises about 07:27 and sets about 18:42 local time in mid-October. Average cloud cover is 31%.

Is October a good time to visit Mykonos?

It is a reasonable choice: warm days. The best months for Mykonos on our scoring are July, August, June; months averaging 25°C or more: Jul, Aug.

Warmer than London, but not summer heat

October's average daytime high is 6.5°C above London's, a useful improvement if you want to spend more of your holiday outdoors. It is still better suited to walking and sitting outside than relying on hot afternoons beside the sea. Only 3% of days reach 25°C, so do not book expecting that level of warmth throughout your stay. The warmest days can reach 23.7°C or more, while the colder nights fall to 15.2°C or below. Pack light daytime clothes alongside a jumper and long trousers. If heat is your main priority, July, August and June are better choices here.

Useful sunshine, with room for rain

There is about 7.6 hours of sunshine within 11 hours of daylight, giving October a useful amount of bright weather for being outside. Plan outdoor time around the daylight rather than expecting long summer evenings. About 4 days have measurable rain during the month, so rain is a possibility to plan around, not a reason on its own to rule out the trip. A light waterproof is sensible, and it helps to keep your plans flexible when showers threaten. Those monthly averages cannot promise a dry stay, but they support choosing October if sunshine matters more to you than uninterrupted heat.

Swimming is a matter of tolerance

The sea is the main catch if swimming is central to your plans. At an average of 21.4°C, it falls in the bracing category rather than the warm-swimming range. Year-to-year temperatures range from 20°C to 22°C, so even the warmer end only reaches the threshold for that warmer category. If you are comfortable with a cool dip, pack swimwear, but avoid making daily swims the test of a successful holiday. Have something dry to put on afterwards, and use the warmer part of the day for time by the water. October makes more sense when swimming is optional rather than essential.