Gdańsk weather in September
September in Gdańsk: nice, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Gdańsk · #216 of 604 destinations to visit in September · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Gdańsk climate normals — September
| Daytime high | 19°C / 66°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Feels like (high) | 17°C / 63°F | |
| Rainfall | 50 mm / 2 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 8.8 h/day | |
| Daylight | 12.7 h | |
| Wind | 20 km/h / 13 mph | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Gdańsk in September — FAQ
- Is September a good time to visit Gdańsk?
- September in Gdańsk: nice, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Gdańsk on SeasonMap's comfort score (84/100).
- What is the weather like in Gdańsk in September?
- In September, Gdańsk averages a daily high of 18.9°C and a low of 12°C, with about 50 mm of rain over roughly 8.6 rainy days.
- What is the air quality in Gdańsk in September?
- Gdańsk has a mean US Air Quality Index of about 43 in September.