The weather in Kos on sunday 21 September 2025
The average max temperature in Kos on 21 September is normally around 29°C. For comparison: the highest daytime temperature in the past 10 years was 33°C in 2023, while the lowest was 27°C in 2017.
There’s no chance of precipitation, as there’s been no record of it on this day in the past 10 years. The wind often comes from the Northwest with a maximum strength of 4 Bft.The UV index can reach 8.
20 September
Temperature on 21 September in Kos per year
This chart shows the average temperature on 21 September in Kos, measured in degrees Celsius, over the past years.
Precipitation on 21 September in Kos over the past years
This chart shows the total measured precipitation in millimetres on 21 September in Kos over the past years.
Average Weather in Kos by Month
Click on a month below to see detailed weather info for Kos. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
