Istiaía Weather in September
What's the weather like in Istiaía (Greece) in September 2026?
The climate in Istiaía during September can be summarized as warm and reasonably dry.
September is in the fall / autumn in Istiaía and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 27°C (80°F), whilst at night 15°C (59°F) is normal.
| Daytime temperature | 26.5°C 79.7°F |
|---|---|
| Nightly temperature | 14.9°C 58.8°F |
| Average temperature | 20.7°C 69.3°F |
| Daily sunshine | 10.2 hrs |
| Avg rainfall | 31 mm 1.2 ins |
| Rainy days | 3 days |
| Sea temperature | 23.9°C 75°F |
| Humidity | 61% |
| Windspeed | 5kph 3 mph |
On average September is the 4th driest month of the year in Istiaía with around 31mm 1.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.
On the flip side this corresponds to an average of 10.2 hours of sunshine per day.
September temperatures in Istiaía
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 Istiaía in September 2026.
Other monthly averages
Best places to visit in September
Istiaía weather stats
| Hottest month: | July | 30°C 86°F |
|---|---|---|
| Driest month: | July | 16mm 0.6ins |
| Sunniest month: | July | 13.5hrs |
| Coldest month: | January | 10.1°C 50.2°F |
| Wettest month: | December | 92mm 3.6ins |
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