Kos weather in January
January in Kos: cool, soaked, with clean air — a gamble, with 16 rainy days.
#12 of 12 months in Kos · #711 of 897 destinations to visit in January · comfort 53/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kos in January
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Kos climate normals — January
| Daytime high | 15°C / 58°F | 🙂 cool |
|---|---|---|
| Nighttime low | 12°C / 53°F | |
| Rainfall | 232 mm / 9.1 in | ⛈ soaked |
| Rainy days | 16 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 7°C / 44°F | |
| Sunshine | 7.9 h/day | |
| Daylight | 10 h | |
| Wind | 36 km/h / 23 mph | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Kos in January — FAQ
- Is January a good time to visit Kos?
- January in Kos: cool, soaked, with clean air — a gamble, with 16 rainy days. It ranks #12 of 12 months for Kos on SeasonMap's comfort score (53/100).
- What is the weather like in Kos in January?
- In January, Kos averages a daily high of 14.6°C and a low of 11.9°C, with about 231.6 mm of rain over roughly 15.6 rainy days.
- What is the air quality in Kos in January?
- Kos has a mean US Air Quality Index of about 43 in January.