September · Greece
Best time to visit Kalymnos in September Weather, crowds & prices
Weather in Kalymnos in September
Average temperature 25°C, 5 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).
September score
10.0/10
Ranked #4 of 12 months
- Avg temp
- 25°C
- Rainfall
- 5 mm
- Humidity
- 64%
- Days with 6h+ sun
- 30
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Kalymnos scores 10.0/10 for beach and coastal travel - an above-average month (#4 of 12). Expect around 25°C, 5 mm of rain, and roughly 30 days with 6+ hours of sunshine this month.
Kalymnos is the Dodecanese island of sponge divers and limestone cliffs, now a major rock climbing spot.
September ranks 4th of 12 for Kalymnos — one of the best windows
September averages 25°C (77°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 5 mm for the month, with about 30 days with 6+ hours of sunshine and 12.4 hours of daylight to work with.
A 10/10 puts this among the year's best months in Kalymnos (4th of 12); only June scores higher, at 10/10.
Pack light clothing, swimwear and real sun protection.
Plan for peak pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Kalymnos in September?
- In September, Kalymnos averages 25°C, 5 mm of rain, and about 30 days with 6+ hours of sunshine. Its climate-comfort score is 10.0/10.
- Is September a good time to visit Kalymnos?
- September 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 Kalymnos in September?
- Expect about 5 mm of rain in September. Average humidity is 64% and there are about 30 days with 6+ hours of sunshine.
Curated in Kalymnos
Tickets & experiences
Things to do in Kalymnos
Kalymnos, Greece. Live activities and tours from GetYourGuide, matched to this destination.