In Kos (or Cos), an island of the Eastern Aegean Sea, belonging to the
, with mild, rainy winters and hot, sunny summers.
amounts to 730 millimeters (28.5 inches) per year and is concentrated between October and March; it often occurs in the form of thunderstorm, and sometimes can be abundant. In summer, it almost never rains. Owing to the length of the dry period, the landscape is semi-arid, except in the inland hills, which reach about 800 meters (2,600 feet) above sea level.
, from December to mid-March, is mild enough: daytime temperatures hover about 14/15 °C (57/59 °F). The rains are quite frequent, but there are also sunny days.
Sometimes there can be cold periods, with maximum temperatures of 5/7 °C (41/45 °F). The wind can increase the feeling of cold. Every now and then, you can even see a bit of snow, though usually without accumulation, at least at sea level.
, from mid-March to May, is mild, and over the weeks, it becomes progressively warmer, sunnier and less rainy.
, from June to mid-September, is hot and sunny. The
, the wind from the north-west, blows by mid-May, cooling the air, but with lower intensity than on the central islands of the Aegean Sea. In addition, sometimes there may be a period of intense heat, with maximum temperatures around 36/37 °C (97/99 °F) or more.
, from mid-September to November, is often sunny and pleasantly warm at the beginning, and gradually becomes milder, while the rains become more frequent.
in Kos is great in summer, when clear skies prevail, and it's very good in late spring, while in autumn and winter, sunny periods alternate with others characterized by clouds and rain.
is warm enough for swimming from July to September, and reaches 24.5 °C (76 °F) in August and September.
to go to Kos for a beach holiday runs from June to mid-September. In early June, it can still be a little cool in the evening: for safety, you can bring a sweatshirt.
In May, not only the sea is still a bit cold, but also the air can be cool for sunbathing, at least on certain days.
If you want to visit the ruins of ancient Greece or of the Middle Ages, the best time is spring, especially the month of May, since in summer, it can be hot. You can also choose autumn, especially October, whereas November is cooler and rainier.
. Here are the average temperatures.
January, the coldest month of the year, is generally a mild month. The average temperature is of
11.2 °C, with a minimum of
8.9 °C and a maximum of
13.6 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C. However, it dropped to
-1.2 °C in January 2015.
On the warmest days of the month, the temperature usually reaches around
17 °C. However, it reached
19 °C in January 2003.
Precipitation amounts to
170 mm, distributed over 12 days.
The day lasts on average 9 hours and 55 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
16.7 kph.
The average sea temperature is of
16.5 °C. Therefore, the sea is cold for swimming.
February is generally a mild month. The average temperature is of
11.4 °C, with a minimum of
8.9 °C and a maximum of
14 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C. However, it dropped to
-2 °C in February 2004.
On the warmest days of the month, the temperature usually reaches around
18 °C. However, it reached
25 °C in February 2016.
Precipitation amounts to
115 mm, distributed over 10 days.
The day lasts on average 10 hours and 55 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
17.3 kph.
The average sea temperature is of
16 °C. Therefore, the sea is cold for swimming.
March is generally a mild month. The average temperature is of
13.1 °C, with a minimum of
10.4 °C and a maximum of
15.9 °C.
On the coldest nights of the month, the temperature usually drops to around
6 °C. However, it dropped to
1 °C in March 2003.
On the warmest days of the month, the temperature usually reaches around
20 °C. However, it reached
23 °C in March 2008.
Precipitation amounts to
75 mm, distributed over 9 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 70%.
The average wind speed is of
16.6 kph.
The average sea temperature is of
16 °C. Therefore, the sea is cold for swimming.
April is generally a very mild month. The average temperature is of
16 °C, with a minimum of
12.8 °C and a maximum of
19.1 °C.
On the coldest nights of the month, the temperature usually drops to around
9 °C. However, it dropped to
4 °C in April 1997.
On the warmest days of the month, the temperature usually reaches around
24.5 °C. However, it reached
29 °C in April 2001.
Precipitation amounts to
35 mm, distributed over 7 days.
The day lasts on average 13 hours and 10 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 66% of the time.
The average humidity is 69%.
The average wind speed is of
15.2 kph.
The average sea temperature is of
16.8 °C. Therefore, the sea is cold for swimming.
May is generally a warm month. The average temperature is of
20.2 °C, with a minimum of
16.5 °C and a maximum of
23.8 °C.
On the coldest nights of the month, the temperature usually drops to around
13 °C. However, it dropped to
11 °C in May 1991.
On the warmest days of the month, the temperature usually reaches around
29.5 °C. However, it reached
37.4 °C in May 2020.
Precipitation amounts to
20 mm, distributed over 5 days.
The day lasts on average 14 hours and 10 minutes. So the days are long.
There are on average 9.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 67%.
The average wind speed is of
14.9 kph.
The average sea temperature is of
19 °C. Therefore, the sea is very cool for swimming.
June is generally a warm to hot month. The average temperature is of
24.5 °C, with a minimum of
20.6 °C and a maximum of
28.5 °C.
On the coldest nights of the month, the temperature usually drops to around
17.5 °C. However, it dropped to
14 °C in June 1994.
On the warmest days of the month, the temperature usually reaches around
34 °C. However, it reached
39 °C in June 2007.
Precipitation amounts to only
8 mm, distributed over 3 days.
The day lasts on average 14 hours and 40 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 11 hours of sunshine per day. So, the sun shines 77% of the time.
The average humidity is 61%.
The average wind speed is of
17.2 kph.
The average sea temperature is of
21.9 °C. Therefore, the sea is cool for swimming.
July is generally a warm to hot month. The average temperature is of
26.7 °C, with a minimum of
22.6 °C and a maximum of
30.9 °C.
On the coldest nights of the month, the temperature usually drops to around
20.5 °C. However, it dropped to
18 °C in July 1991.
On the warmest days of the month, the temperature usually reaches around
35.5 °C. However, it reached
43 °C in July 2007.
Precipitation amounts to only
2 mm, distributed over 3 days.
The day lasts on average 14 hours and 25 minutes. So the days are long.
There are on average 12 hours of sunshine per day. So, the sun shines 84% of the time.
The average humidity is 60%.
The average wind speed is of
19.8 kph.
The average sea temperature is of
23.7 °C. Therefore, the sea can be considered barely acceptable for swimming.
August, the hottest month of the year, is generally a warm to hot month. The average temperature is of
27 °C, with a minimum of
23 °C and a maximum of
30.9 °C.
On the coldest nights of the month, the temperature usually drops to around
21 °C. However, it dropped to
19 °C in August 1991.
On the warmest days of the month, the temperature usually reaches around
35 °C. However, it reached
40 °C in August 2006.
Precipitation amounts to only
5 mm, distributed over 3 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 11.5 hours of sunshine per day. So, the sun shines 85% of the time.
The average humidity is 63%.
The average wind speed is of
18.8 kph.
The average sea temperature is of
24.6 °C. Therefore, the sea is warm enough for swimming.
September is generally a warm to hot month. The average temperature is of
24.1 °C, with a minimum of
20.7 °C and a maximum of
27.6 °C.
On the coldest nights of the month, the temperature usually drops to around
18 °C. However, it dropped to
15 °C in September 1997.
On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
36 °C in September 2000.
Precipitation amounts to
15 mm, distributed over 3 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 9.5 hours of sunshine per day. So, the sun shines 77% of the time.
The average humidity is 65%.
The average wind speed is of
16.5 kph.
The average sea temperature is of
23.9 °C. Therefore, the sea is warm enough for swimming.
October is generally a warm month. The average temperature is of
20.5 °C, with a minimum of
17.4 °C and a maximum of
23.6 °C.
On the coldest nights of the month, the temperature usually drops to around
13.5 °C. However, it dropped to
8 °C in October 2003.
On the warmest days of the month, the temperature usually reaches around
28 °C. However, it reached
35 °C in October 1991.
Precipitation amounts to
60 mm, distributed over 6 days.
The day lasts on average 11 hours and 10 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 68%.
The average wind speed is of
14.4 kph.
The average sea temperature is of
22 °C. Therefore, the sea is cool for swimming.
November is generally a very mild month. The average temperature is of
16.3 °C, with a minimum of
13.6 °C and a maximum of
19 °C.
On the coldest nights of the month, the temperature usually drops to around
9.5 °C. However, it dropped to
4 °C in November 2004.
On the warmest days of the month, the temperature usually reaches around
24 °C. However, it reached
29 °C in November 1992.
Precipitation amounts to
90 mm, distributed over 8 days.
The day lasts on average 10 hours and 10 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
14.3 kph.
The average sea temperature is of
19.6 °C. Therefore, the sea is very cool for swimming.
December is generally a mild month. The average temperature is of
12.9 °C, with a minimum of
10.6 °C and a maximum of
15.1 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C. However, it dropped to
1 °C in December 1992.
On the warmest days of the month, the temperature usually reaches around
19.5 °C. However, it reached
22 °C in December 2010.
Precipitation amounts to
135 mm, distributed over 12 days.
The day lasts on average 9 hours and 40 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 4 hours of sunshine per day. So, the sun shines 41% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
16.3 kph.
The average sea temperature is of
17.6 °C. Therefore, the sea is cold for swimming.