Weather in Kos: September
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Average day temperature: | 79.0°F |
| Average night temperature: | 74.9°F | |
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Sea water temperature: | 77.1°F |
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Number of sunny days: | 28 days |
| Day length: | 11.8 - 13.0 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.6 in. | |
| more information | ||
forecast
| Kos |
Air temperature in September, °F
The highest day temperature during September of 2025 was 78°F. At the same time the lowest night temperature was 68°F. Daily and nightly averages during September were 75.1°F and 73.2°F.
Sea water temperature in Kos in September, °F
The average sea water temperature in September of 2025 was 76.2°F. The highest and lowest sea temperatures during the month were 77.5°F and 74.7°F.
Almost all days of September in Kos are sunny. Cloudy days are rare.
Precipitation total in September, in.
Precipitation total value in Kos in September is 0.6 in. Other months of the year show relatively similar values.
The average wind speed value in September is 14.0 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 11.4.
Best time for vacation in Kos
Kos on a weather map
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