Sými Weather in September
What's the weather like in Sými (Greece) in September 2025?
The climate in Sými during September can be summarized as hot and dry.
September is in the fall / autumn in Sými and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (85°F), whilst at night 19°C (66°F) is normal.
| Daytime temperature | 29.2°C 84.5°F |
|---|---|
| Nightly temperature | 18.8°C 65.9°F |
| Average temperature | 24°C 75.2°F |
| Daily sunshine | 12 hrs |
| Avg rainfall | 13 mm 0.5 ins |
| Rainy days | 4 days |
| Sea temperature | 24.3°C 75.7°F |
| Humidity | 58% |
| Windspeed | 9.5kph 6 mph |
On average September is the 4th driest month of the year in Sými with around 13mm 0.5 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 12 hours of sunshine per day.
September temperatures in Sými
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 Sými in September 2025.
Other monthly averages
Best places to visit in September
Sými weather stats
| Hottest month: | July | 31.8°C 89.2°F |
|---|---|---|
| Driest month: | July | 3mm 0.1ins |
| Sunniest month: | July | 14.8hrs |
| Coldest month: | January | 13.9°C 57°F |
| Wettest month: | December | 186mm 7.3ins |
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