Best time to visit Ios
The best time to visit Ios for a beach holiday is from mid-June to mid-September, when the weather is warm and sunny.
However, anytime from mid-May to mid-October is good for a range of outdoor activities.
Ios weather
Ios enjoys a Mediterranean climate with hot, sunny summers and mild, wet winters. Despite the winter rainfall, Ios is considered a year-round destination. The island is quite windy; during summer, temperatures are cooled by a frequent wind – the Meltemi – that blows from the north.
Winter, from December to mid-March, is cool, rainy and windy. January is the coldest month and December the wettest month of the year.
Spring, from mid-March to May, is mild and sunny, with rainfall gradually decreasing; it's also quite windy. By mid-May, the Meltemi starts to blow, with a persistent cool and dry wind during the daytime, and sometimes at night.
Summer, from June to September, is warm, sunny and windy, with an average high temperature of 30°C (86°F) in July and August. The Meltemi is fairly consistent throughout summer and keeps temperatures reasonable cool.
Autumn, from mid-September to November, is initially warm and sunny, but gradually becomes cooler and more rainy. Autumn is windy.
What is the best month to visit Ios?
June through September are the best months to visit Ios – the climate is perfect with warm, sunny weather and little to no rainfall.
July and August are especially popular, since this is the peak tourist season in Ios.
To avoid the crowds, higher prices and extreme heat of summer, the months of May and early-October are also good for a range of outdoor activities.
Which is the hottest month in Ios?
The hottest month of the year in Ios is normally August, with an average daily high temperature of 30°C (86°F), with high heat and humidity, and a low of 23°C (73°F)
The hot summer season lasts from early-June through to mid-September, with an average daily high temperature above 27°C (80°F).
Which is the coldest month in Ios?
The coldest month of the year in Ios is January, with an average high of 13°C (55°F) and a low of 8°C (46°F).
The cooler winter season lasts from early-December through March, with an average daily high temperature below 18°C (64°F).
Which is the sunniest month in Ios?
The sunniest time of year in Ios is usually July with an average of 12 hours of sunshine per day; that's on average 95% of daylight hours.
When is the sea warmest in Ios?
The sea is usually at its warmest in Ios in August when the water temperature reaches 24°C (75°F), which is warm enough for swimming.
You can expect warmer water in July through to September, with the average temperature above 23°C (73°F).
Which month has the most rain in Ios?
December is usually the wettest month in Ios with 90mm (3.5in) of rainfall on average. There are normally 10 days in December with some rain.
The rainy period of the year lasts from late-October through March, with a greater than 16% chance of a given day being a wet day.
The drier season lasts from April through to late-October. The summer months of June, July and August rarely experience any rainfall.
Which is the windiest month in Ios?
The windiest month of the year in Ios is February, with an average hourly wind speed of more than 25 kilometres per hour (15.5 mph; 13.5 knots).
The windy part of the year lasts from late-October to early-April, with average wind speeds of more than 21 kilometres per hour (13 mph; 11 knots).
The less-windy time of year lasts from early-April to late-October. The calmest month of the year in Ios is May, with an average hourly wind speed of 17 kilometres per hour (10.6 mph; 9 knots).
The predominant average hourly wind direction in Ios is from the north throughout the year.
Ios Weather Averages
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Average high temperature (°C) | |||||||||||
| 13 | 13 | 15 | 19 | 24 | 28 | 30 | 30 | 27 | 23 | 18 | 14 |
| Average low temperature (°C) | |||||||||||
| 8 | 8 | 10 | 12 | 16 | 20 | 22 | 23 | 20 | 17 | 13 | 10 |
| Average daily sunshine (hrs) | |||||||||||
| 4 | 5 | 6 | 8 | 9 | 11 | 12 | 11 | 9 | 7 | 5 | 4 |
| Average daily daylight (hrs) | |||||||||||
| 10 | 11 | 12 | 13 | 14 | 14 | 14 | 13 | 12 | 11 | 10 | 10 |
| Comfort level | |||||||||||
 |
|
 |
| s
 | s
 |
 |
|
|
|
|
|
| Average relative humidity (%) | |||||||||||
| 70 | 71 | 71 | 73 | 75 | 76 | 76 | 77 | 73 | 72 | 72 | 70 |
| UV Index (max) | |||||||||||
| 2 | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 7 | 5 | 3 | 2 |
| Average days of rainfall (≥1mm) | |||||||||||
| 7 | 7 | 5 | 4 | 2 | 0 | 0 | 0 | 1 | 2 | 6 | 10 |
| Average monthly rainfall (mm) | |||||||||||
| 65 | 65 | 50 | 20 | 15 | 0 | 0 | 0 | 5 | 30 | 60 | 90 |
| Average wind speed (km/h) | |||||||||||
| 25 | 25 | 23 | 20 | 17 | 18 | 23 | 23 | 21 | 21 | 22 | 24 |
| Average sea temperature (°C) | |||||||||||
| 16 | 15 | 15 | 16 | 18 | 22 | 23 | 24 | 24 | 22 | 19 | 17 |
| Ios, Cyclades, Greece | |||||||||||
Holiday seasons
Peak season: July and August, when hotel and restaurant prices sky-rocket.
Low season: From March to June and from September to October – the temperature is cooler, hotel prices are more reasonable and the crowds non-existent.
Note: The winter off-season, from November through February, is generally quiet everywhere; many hotels, restaurants and bars close down and the beaches are deserted. Ferry and air services are dramatically reduced.
Source: Meteorological data for Ios is based on weather statistics gathered for the 30-year period 1991 to 2020 by the Hellenic National Meteorological Service (HNMS).
Advice on the best time to visit a particular destination is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.
Latest update: Best time to visit Ios: 12 May, 2024
Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.
Advertising