Kálymnos Weather in September
What's the weather like in Kálymnos (Greece) in September 2025?
The climate in Kálymnos during September can be summarized as hot and dry.
September is in the fall / autumn in Kálymnos and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 28°C (83°F), whilst at night 20°C (67°F) is normal.
| Daytime temperature | 28.2°C 82.8°F |
|---|---|
| Nightly temperature | 19.5°C 67.1°F |
| Average temperature | 23.9°C 74.9°F |
| Daily sunshine | 11.9 hrs |
| Avg rainfall | 16 mm 0.6 ins |
| Rainy days | 4 days |
| Sea temperature | 23.9°C 74.9°F |
| Humidity | 58% |
| Windspeed | 12.6kph 8 mph |
On average September is the 4th driest month of the year in Kálymnos with around 16mm 0.6 inches of rain making it a dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 11.9 hours of sunshine per day.
September temperatures in Kálymnos
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Kálymnos in September 2025.
Other monthly averages
Best places to visit in September
Kálymnos weather stats
| Hottest month: | July | 31.1°C 88°F |
|---|---|---|
| Driest month: | July | 1mm 0ins |
| Sunniest month: | July | 14.8hrs |
| Coldest month: | January | 14°C 57.2°F |
| Wettest month: | January | 165mm 6.5ins |
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