September · Poland
Best time to visit Gdansk in September Weather, crowds & prices
Weather in Gdansk in September
Average temperature 16°C, 39 mm of rain, about 25 days with 6+ hours of sunshine and 75% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.4/10
Ranked #2 of 12 months
- Avg temp
- 16°C
- Rainfall
- 39 mm
- Humidity
- 75%
- Days with 6h+ sun
- 25
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Gdansk scores 9.4/10 for sightseeing and cultural travel - one of the top 12-month picks (#2). Expect around 16°C, 39 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Gdańsk rebuilt its merchant houses and cranes after the war, opening a Hanseatic old town onto the Baltic.
September ranks 2nd of 12 for Gdansk — one of the best windows
September averages 16°C (61°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Expect 39 mm of rain — occasional showers rather than washed-out days — alongside about 25 days with 6+ hours of sunshine and 12.7 daylight hours.
A 9.4/10 puts this among the year's best months in Gdansk (2nd of 12); only May scores higher, at 9.6/10.
Pack layers you can shed by midday plus one warm layer for the evening.
Figure on peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Gdansk in September?
- In September, Gdansk averages 16°C, 39 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 9.4/10.
- Is September a good time to visit Gdansk?
- September earns a 9.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Gdansk in September?
- Expect about 39 mm of rain in September. Average humidity is 75% and there are about 25 days with 6+ hours of sunshine.
Curated in Gdansk
Tickets & experiences
Things to do in Gdansk
Gdansk, Poland. Live activities and tours from GetYourGuide, matched to this destination.