Mykonos has a classic Mediterranean climate with hot, dry summers and mild, wetter winters. The island averages 300 days of sunshine per year and sits in the central Aegean Sea, where the famous meltemi winds blow from the north between June and September. See our Mykonos travel tips for more details. These winds can reach 50 km/h (31 mph) on exposed beaches but also keep humidity bearable when mainland Greece swelters. Sea temperatures range from a brisk 16 degrees Celsius (61 degrees Fahrenheit) in February to a comfortable 25 degrees Celsius (77 degrees Fahrenheit) in August.
Mykonos Weather by Month: Temperature and Rainfall
| Month | Avg High (°C/°F) | Avg Low (°C/°F) | Rainfall (mm) | Sea Temp (°C/°F) | Sunshine (hrs/day) |
|---|---|---|---|---|---|
| January | 13 / 55 | 8 / 46 | 75 | 16 / 61 | 4 |
| February | 13 / 55 | 8 / 46 | 55 | 16 / 61 | 5 |
| March | 15 / 59 | 9 / 48 | 45 | 16 / 61 | 6 |
| April | 18 / 64 | 11 / 52 | 25 | 17 / 63 | 8 |
| May | 23 / 73 | 15 / 59 | 15 | 19 / 66 | 10 |
| June | 27 / 81 | 19 / 66 | 5 | 22 / 72 | 12 |
| July | 29 / 84 | 22 / 72 | 3 | 24 / 75 | 13 |
| August | 29 / 84 | 22 / 72 | 3 | 25 / 77 | 12 |
| September | 26 / 79 | 19 / 66 | 10 | 24 / 75 | 10 |
| October | 22 / 72 | 16 / 61 | 40 | 21 / 70 | 7 |
| November | 18 / 64 | 12 / 54 | 65 | 19 / 66 | 5 |
| December | 15 / 59 | 10 / 50 | 85 | 17 / 63 | 4 |
Mykonos Weather by Month: Winter (January to March)
January is the coldest month with highs of 13 degrees Celsius (55 degrees Fahrenheit) and about 10 rainy days. February brings similar temperatures but slightly less rain (55mm). By March temperatures climb to 15 degrees Celsius (59 degrees Fahrenheit) and rainfall drops to 45mm. See our best beaches in Mykonos for more details. Most beach clubs and seasonal hotels remain closed through mid-April. Ferry schedules to Athens are reduced to 2-3 crossings per day instead of the summer frequency of 8-10. The meltemi winds are absent, making this the calmest sea period.
Mykonos Weather by Month: Spring (April to May)
April sees daytime highs reach 18 degrees Celsius (64 degrees Fahrenheit) with only 25mm of rain. Wildflowers cover the hillsides and the first beach bars begin reopening around Greek Easter (typically mid-April). May is one of the best months: highs of 23 degrees Celsius (73 degrees Fahrenheit), 10 hours of sunshine, and only 15mm of rain. See our where to stay in Mykonos for more details. The sea warms to 19 degrees Celsius (66 degrees Fahrenheit). The meltemi winds have not yet arrived and hotel prices are 30-40% below July levels. The first direct international flights from London, Paris, and Rome resume in May.
Mykonos Weather by Month: Summer (June to August)
June delivers near-perfect conditions: highs of 27 degrees Celsius (81 degrees Fahrenheit), virtually zero rainfall (5mm), and 12 hours of daily sunshine. The meltemi winds begin mid-June and can gust to 40-50 km/h on north-facing beaches like Agios Sostis and Panormos. July and August are the hottest months at 29 degrees Celsius (84 degrees Fahrenheit) with only 3mm of rain each. See our things to do in Mykonos for more details. The sea reaches its warmest at 25 degrees Celsius (77 degrees Fahrenheit) in August. Humidity stays moderate (55-65%) thanks to the persistent northerly wind. Sunscreen is essential, UV index regularly hits 9-10.
Mykonos Weather by Month: Autumn (September to October)
September maintains summer warmth with highs of 26 degrees Celsius (79 degrees Fahrenheit) and the sea stays at 24 degrees Celsius (75 degrees Fahrenheit), warmer than June. The meltemi winds begin to ease by mid-September. October sees a noticeable shift: highs drop to 22 degrees Celsius (72 degrees Fahrenheit) and rain increases to 40mm. See our Mykonos events and festivals for more details. Beach clubs begin closing in the second week of October. October still delivers 7 hours of sunshine and the sea holds at 21 degrees Celsius (70 degrees Fahrenheit), swimmable with a wetsuit top. Most direct international flights end by late October.
Mykonos Weather by Month: Late Autumn (November to December)
November brings 65mm of rain across roughly 8 wet days and highs of 18 degrees Celsius (64 degrees Fahrenheit). Most hotels, restaurants, and shops in Mykonos Town close by mid-November. See our best time to visit Mykonos for more details. December is the wettest month at 85mm and coolest after January at 15 degrees Celsius (59 degrees Fahrenheit) daytime. The island effectively hibernates from December through March. Ferry schedules are minimal and many routes to other Cycladic islands stop entirely.
