December · Greece
Best time to visit Kos Island in December Weather, crowds & prices
Weather in Kos Island in December
Average temperature 16°C, 166 mm of rain, about 0 days with 6+ hours of sunshine and 75% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
1.4/10
Ranked #12 of 12 months
- Avg temp
- 16°C
- Rainfall
- 166 mm
- Humidity
- 75%
- Days with 6h+ sun
- 0
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
December in Kos Island scores 1.4/10 for beach and coastal travel - ranked #12 of 12. Expect around 16°C, 166 mm of rain, and roughly 0 days with 6+ hours of sunshine this month.
Kos mixes sandy beaches and cycling paths with the ruins of Hippocrates' ancient healing centre.
December in Kos Island: expect compromises
Temperatures hover around 16°C (61°F) — the kind of month where neither heat nor cold forces the schedule.
166 mm of rain signals a properly wet month, with only almost no days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 1.4/10 on the same scale — 12th of 12 months, versus 10/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, June is materially better in Kos Island — 8.6 points higher on the same scale.
Frequently asked
- What is the weather like in Kos Island in December?
- In December, Kos Island averages 16°C, 166 mm of rain, and about 0 days with 6+ hours of sunshine. Its climate-comfort score is 1.4/10.
- Is December a good time to visit Kos Island?
- December earns a 1.4/10 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 December?
- Expect about 166 mm of rain in December. Average humidity is 75% and there are about 0 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.