Weather in Kos in May 2025
- May is usually the wettest month of the year in Kos;
Average weather
Average temperature in Kos in May
Going from a maximum of +21°C during the day to a minimum of +16°C during the night, the temperature in May averages around +20°C.
The average maximum temperature goes up 60% by the end of the month, compared with the beginning of the month, from +18°C to +21°C.
Is Kos warm or cold in May?
Kos is typically mild in May.
Maximum temperatures go up compared to the previous month from +18°C to +21°C. The minimum temperature also goes up from +15°C to +18°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how May is compared to other months in Kos:
Water temperature in Kos in May
Water in Kos in May is Fresh. It varies from +18°C to +22°C, with an average of +20°C. This is almost similar to the air temperature, which averages +21°C.
In May, water temperatures are average relative to the rest of the year:
Can you swim in Kos in May?
Climate in Kos in May
| April | May | June | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +18°C | +21°C | +25°C | ||||
| Min. temperature | ||||||
| +7°C | +12°C | +15°C | ||||
| Max. temperature | ||||||
| +29°C | +37°C | +38°C | ||||
| Rainfall | ||||||
| 27 mm | 10 mm | 2 mm | ||||
| Wind | ||||||
| 5 m/s | 5 m/s | 6 m/s | ||||
| Avg. water temperature | ||||||
| +17°C | +20°C | +23°C | ||||
| Humidity | ||||||
| 77% | 80% | 79% | ||||
| Air pressure | ||||||
| 1012 HPa | 1011 HPa | 1009 HPa | ||||
| Sunny days | ||||||
| 12 | 17 | 26 | ||||
| Cloudy days | ||||||
| 10 | 9 | 3 | ||||
| Rainy days | ||||||
| 9 | 5 | 1 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
May weather is still as good as in April. It’s getting warmer as May arrives. The average maximum temperature goes up from +18°C to +21°C during the day. As May arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 27 mm to 10 mm. Humidity rises from 77% to 80%. The average wind speed doesn’t change much during May, staying around 5 m/s. The good news is there are likely to be more sunny days in May, from 12 to 17.
But maybe it is worth considering traveling in June as the weather gets better.
Wind
The average wind speed is 5 m/s getting up to 10 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Kos is gradually decreasing during May, going from 3 m/s to 2 m/s over the course of the month.
Rain
How was the weather last May in Kos?
Climate Change over Years
The climate in Kos in May has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+19°C) and the highest in 2018 (+24°C). The driest year was 1992 with only 335 mm of rainfall, and the wettest year was 2019 with 1062 mm.
FAQ
Is May a good time to visit Kos?
Can you sunbathe in Kos in May?
Can you swim in Kos in May?
Is Kos rainy in May?
Is it sunny in Kos in May?
Other cities in Greece
Monthly weather in Kos
Source of the data
For this page, we’ve looked at the typical weather in Kos, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.