Santorini weather in September
September in Santorini: warm, dry — an excellent time to visit.
#5 of 12 months in Santorini · #251 of 604 destinations to visit in September · comfort 83/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Santorini climate normals — September
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 22°C / 72°F | |
| Feels like (high) | 25°C / 77°F | |
| Rainfall | 1 mm / 0 in | ☀️ dry |
| Rainy days | 0 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 18°C / 65°F | |
| Sunshine | 11.3 h/day | |
| Daylight | 12.4 h | |
| Wind | 33 km/h / 20 mph | |
| Air quality (US AQI) | 52 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Santorini in September — FAQ
- Is September a good time to visit Santorini?
- September in Santorini: warm, dry — an excellent time to visit. It ranks #5 of 12 months for Santorini on SeasonMap's comfort score (83/100).
- What is the weather like in Santorini in September?
- In September, Santorini averages a daily high of 24.9°C and a low of 22.3°C, with about 1.1 mm of rain over roughly 0.4 rainy days.
- What is the air quality in Santorini in September?
- Santorini has a mean US Air Quality Index of about 52 in September.