Thessaloniki weather in September
September in Thessaloniki: warm, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Thessaloniki · #151 of 604 destinations to visit in September · comfort 87/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Thessaloniki climate normals — September
| Daytime high | 28°C / 82°F | 🌤 warm |
|---|---|---|
| Nighttime low | 19°C / 66°F | |
| Feels like (high) | 28°C / 82°F | |
| Rainfall | 40 mm / 1.6 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 68% | 💧 humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 12.5 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Thessaloniki?
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Thessaloniki in September — FAQ
- Is September a good time to visit Thessaloniki?
- September in Thessaloniki: warm, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Thessaloniki on SeasonMap's comfort score (87/100).
- What is the weather like in Thessaloniki in September?
- In September, Thessaloniki averages a daily high of 27.7°C and a low of 18.8°C, with about 39.8 mm of rain over roughly 6.2 rainy days.
- What is the air quality in Thessaloniki in September?
- Thessaloniki has a mean US Air Quality Index of about 45 in September.