Kos weather in December
December in Kos: nice, soaked, with clean air — a gamble, with 14 rainy days.
#11 of 12 months in Kos · #674 of 897 destinations to visit in December · comfort 57/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kos in December
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Kos climate normals — December
| Daytime high | 17°C / 63°F | 😎 nice |
|---|---|---|
| Nighttime low | 15°C / 59°F | |
| Rainfall | 213 mm / 8.4 in | ⛈ soaked |
| Rainy days | 14 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 12°C / 53°F | |
| Sunshine | 7.5 h/day | |
| Daylight | 9.7 h | |
| Wind | 32 km/h / 20 mph | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Kos in December — FAQ
- Is December a good time to visit Kos?
- December in Kos: nice, soaked, with clean air — a gamble, with 14 rainy days. It ranks #11 of 12 months for Kos on SeasonMap's comfort score (57/100).
- What is the weather like in Kos in December?
- In December, Kos averages a daily high of 17.1°C and a low of 14.8°C, with about 213.1 mm of rain over roughly 14 rainy days.
- What is the air quality in Kos in December?
- Kos has a mean US Air Quality Index of about 40 in December.