Warm in May
24°C average high
avg high · 15° at night
25°C+ on 4 in 10 days
Greece
Kos weather in May
Is it warm? Mostly. May in Kos is mild: afternoons average 23°C and nights 18°C. Most days (80%) peak between 20°C and 26°C.
Mild · average high
23°C
25°C or more on about two in ten days; 20°C or more on about nine in ten days.
- Average low18°overnight
- Sea20°average, 2023–2025
- Rainy days316 mm in the month
- SkySome cloud30% cloud · 58% clear days
How warm it really gets
Every May afternoon from 2011–2025: 465 days. Most (80%) peaked between 20° and 26°.
May, year by year
The average May high in each year. The warmest, 2018, averaged 26°C; the coolest, 2011, 20°C.
Compared with home
Average May highs. Expect rain on about 3 days (16 mm in a typical month).
- Kos23°
- London17°
- Manchester16°
- Cork15°
- Dublin15°
- Glasgow15°
- Belfast14°
Warmer in May, not much further
Flying times are estimates from Dublin; Kos is about 4h 15m.
Hot in May
28°C average high
avg high · 15° at night
25°C+ on 7 in 10 days
Mild in May
24°C average high
avg high · 16° at night
25°C+ on 3 in 10 days
Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology