June · Greece
Best time to visit Kos Island in June Weather, crowds & prices
Weather in Kos Island in June
Average temperature 26°C, 9 mm of rain, about 30 days with 6+ hours of sunshine and 64% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
June score
10.0/10
Ranked #1 of 12 months
- Avg temp
- 26°C
- Rainfall
- 9 mm
- Humidity
- 64%
- Days with 6h+ sun
- 30
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
June in Kos Island scores 10.0/10 for beach and coastal travel - the single best month of the year. Expect around 26°C, 9 mm of rain, and roughly 30 days with 6+ hours of sunshine this month.
Kos mixes sandy beaches and cycling paths with the ruins of Hippocrates' ancient healing centre.
June in Kos Island tops the year's climate scores
June averages 26°C (79°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rain is a non-issue at 9 mm for the month, with about 30 days with 6+ hours of sunshine and 14.5 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Kos Island at 10/10 — the reference point every other month on this page is measured against.
Pack light clothing, swimwear and real sun protection.
Plan for peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Kos Island in June?
- In June, Kos Island averages 26°C, 9 mm of rain, and about 30 days with 6+ hours of sunshine. Its climate-comfort score is 10.0/10.
- Is June a good time to visit Kos Island?
- June earns a 10.0/10 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 June?
- Expect about 9 mm of rain in June. Average humidity is 64% and there are about 30 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.