January · Greece
Best time to visit Kos Island in January Weather, crowds & prices
Weather in Kos Island in January
Average temperature 13°C, 145 mm of rain, about 2 days with 6+ hours of sunshine and 73% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
January score
1.5/10
Ranked #11 of 12 months
- Avg temp
- 13°C
- Rainfall
- 145 mm
- Humidity
- 73%
- Days with 6h+ sun
- 2
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
January in Kos Island scores 1.5/10 for beach and coastal travel - ranked #11 of 12. Expect around 13°C, 145 mm of rain, and roughly 2 days with 6+ hours of sunshine this month.
Kos mixes sandy beaches and cycling paths with the ruins of Hippocrates' ancient healing centre.
January in Kos Island — off-season conditions
January averages 13°C (56°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
At 145 mm this is a genuinely wet month: about 2 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 1.5/10 here, 11th of 12 months, against 10/10 in the destination's best month.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Figure on low-season pricing, with crowds are light for this destination.
Flexible dates? June scores 8.5 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Kos Island in January?
- In January, Kos Island averages 13°C, 145 mm of rain, and about 2 days with 6+ hours of sunshine. Its climate-comfort score is 1.5/10.
- Is January a good time to visit Kos Island?
- January earns a 1.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Kos Island in January?
- Expect about 145 mm of rain in January. Average humidity is 73% and there are about 2 days with 6+ hours of sunshine.
Curated in Kos Island
Tickets & experiences
Things to do in Kos Island
Kos Island, Greece. Live activities and tours from GetYourGuide, matched to this destination.