The best times to visit Ios for ideal weather are
February 26th to June 17th
September 10th to December 9th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Ios Travel Guide
Other Ios Travel Info
Weather in Ios
Average temperatures in Ios vary greatly. Considering humidity, temperatures feel very enjoyable all year with a low chance of precipitation most of the year. The area is more temperate than most — in the 70th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Ios, the hottest months are August, July, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 84.4°F (29.1°C) with temperatures rarely dropping below 74.5°F (23.6°C) at night.
Ios Temperatures (Fahrenheit)
Ios Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Ios Perceived Temperature (F)
Ios Perceived Temperature (C)
Average Ios Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Ios are July, August, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid June. For example, on the week of June 11th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late January with an average of 2 days of significant precipitation the week of January 22nd.
When can you find snow in Ios? Weather stations report a bit of annual snow likely to be deepest around January, especially close to late January. The best time to ski (if at all) in Ios is often around around January 22nd when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Ios.
Snow on the Ground
The graph below shows the average snow on the ground in Ios (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Ios has some high humidity months, with other comfortably humid months. The least humid month is July (56.7% relative humidity), and the most humid month is November (62.1%).
Wind in Ios is usually stronger than many places. The windiest month is January, followed by February and August. January’s average wind speed of around 15.5 knots (17.9 MPH or 28.8 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late January where average top sustained speeds reach 21.9 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Ios.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||15.5||Significant breeze||20||Strong breeze|
|Feb||15.3||Significant breeze||20.4||Strong breeze|
|Mar||14.6||Significant breeze||19.5||Strong breeze|
|Apr||13.6||Significant breeze||18.2||Strong breeze|
|May||11.1||Significant breeze||15.2||Strong breeze|
|Jun||11.5||Significant breeze||15.5||Significant breeze|
|Jul||14.8||Significant breeze||19.1||Strong breeze|
|Aug||15.2||Significant breeze||19.3||Strong breeze|
|Sep||14.1||Significant breeze||18||Strong breeze|
|Oct||15.2||Significant breeze||18.9||Strong breeze|
|Nov||14.6||Significant breeze||18.7||Strong breeze|
|Dec||15.1||Significant breeze||19.7||Strong breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Ios?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Greece; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 22, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Ios, Greece is June, followed by July and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Ios in October. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Ios Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 76.5°F (24.7°C) and 59.9°F (15.5°C) with warmer temperatures in the later months. Rain is rare with 1 to 4 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with about 0 days of precipitation per month. June – August is the busiest season for tourism in Ios, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 80.4°F (26.9°C) and 65.6°F (18.7°C), which will feel very nice given the humidity and wind. It rains or snows a normal amount: 0 to 4 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is somewhat cool this time of year in Ios to be enjoyable for warm weather travelers. The average high during this season is between 63.2°F (17.3°C) and 57.4°F (14.1°C). On average, it rains or snows a fair amount: consistently 6 times per month. These times of year are fairly slow with tourists.