The best times to visit Kos Island for ideal weather are
March 12th to June 17th
September 10th to December 16th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Kos Island Travel Guide
Other Kos Island Travel Info
Weather in Kos Island
Average temperatures in Kos Island vary greatly. Considering humidity, temperatures feel nice most of the year, excluding some hot weeks in the summer, with a very low chance of precipitation throughout the year. The area is more temperate than most — in the 71st 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 Kos Island, the hottest months are August, July, and then June. See average monthly temperatures below. The warmest time of year is generally mid to late August where highs are regularly around 89.6°F (32°C) with temperatures rarely dropping below 75°F (23.9°C) at night.
Kos Island Temperatures (Fahrenheit)
Kos Island 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.
Kos Island Perceived Temperature (F)
Kos Island Perceived Temperature (C)
Average Kos Island 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 Kos Island are June, July, and then August. 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 February. For example, on the week of February 12th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid December with an average of 1 days of significant precipitation the week of December 10th.
When can you find snow in Kos Island? Weather stations report no annual snow. 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 Kos Island.
Snow on the Ground
The graph below shows the average snow on the ground in Kos Island (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
Kos Island has some high humidity months, with other comfortably humid months. The least humid month is July (52.8% relative humidity), and the most humid month is December (64.7%).
Wind in Kos Island is usually moderate. The windiest month is July, followed by August and March. July’s average wind speed of around 10.7 knots (12.4 MPH or 19.9 KPH) is considered “a gentle 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 18.7 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Kos Island.
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||9.2||Gentle breeze||15.4||Significant breeze|
|Feb||9.4||Gentle breeze||15.8||Significant breeze|
|Mar||9.5||Gentle breeze||15.9||Significant breeze|
|Apr||8.5||Gentle breeze||14.7||Significant breeze|
|May||7.6||Gentle breeze||13.5||Significant breeze|
|Jun||9.2||Gentle breeze||14.8||Significant breeze|
|Jul||10.7||Gentle breeze||16.4||Significant breeze|
|Aug||10||Gentle breeze||15.8||Significant breeze|
|Sep||8.8||Gentle breeze||14.5||Significant breeze|
|Oct||8||Gentle breeze||13.9||Significant breeze|
|Nov||8||Gentle breeze||13.9||Significant breeze|
|Dec||8.5||Gentle breeze||14.6||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Kos Island?
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 Kos Island, Greece is July, followed by June 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 Kos Island in November. 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 Kos Island Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 77.9°F (25.5°C) and 59.1°F (15.1°C) with warmer temperatures in the later months. Rain is extremely rare with 0 to 1 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 quite warm. These months see the least precipitation with about 0 days of precipitation per month. June – August is the busiest season for tourism in Kos Island, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 84.2°F (29°C) and 64.8°F (18.2°C), which will feel very nice given the humidity and wind. It rains or snows a normal amount: approximately 1 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 too cold this time of year in Kos Island to be enjoyable for warm weather travelers. The average high during this season is between 62.3°F (16.8°C) and 56.3°F (13.5°C). On average, it rains or snows a smalll amount: consistently 2 times per month. These times of year are fairly slow with tourists.