May · Greece
Best time to visit Kythnos in May Weather, crowds & prices
Weather in Kythnos in May
Average temperature 19°C, 19 mm of rain, about 31 days with 6+ hours of sunshine and 76% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
8.1/10
Ranked #5 of 12 months
- Avg temp
- 19°C
- Rainfall
- 19 mm
- Humidity
- 76%
- Days with 6h+ sun
- 31
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Kythnos scores 8.1/10 for beach and coastal travel - an above-average month (#5 of 12). Expect around 19°C, 19 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Kythnos keeps dry stone walls, a divided hilltop capital and the sandy sandbar at Kolona in the western Cyclades.
May in Kythnos: strong conditions, 5th of 12
May averages 19°C (66°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 19 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine and 14 daylight hours.
It scores 8.1/10 here, 5th of 12 months, against 9.9/10 in the destination's best month.
Pack light clothing, swimwear and real sun protection.
Figure on mid-season pricing, with crowds are moderate.
Flexible dates? June scores 1.8 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Kythnos in May?
- In May, Kythnos averages 19°C, 19 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 8.1/10.
- Is May a good time to visit Kythnos?
- May earns a 8.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Kythnos in May?
- Expect about 19 mm of rain in May. Average humidity is 76% and there are about 31 days with 6+ hours of sunshine.
Curated in Kythnos
Tickets & experiences
Things to do in Kythnos
Kythnos, Greece. Live activities and tours from GetYourGuide, matched to this destination.