Gdynia Weather in September
Gdynia in September sees pleasant daytime temperatures of 18°C (64°F) and nighttime lows of 12°C (54°F). Rainfall is fairly high this month at around 74 mm (2.9 in), so pack a rain jacket to stay dry.
Rainfall in Gdynia in September
Rain is expected on roughly 15 days, totalling around 74 mm (2.9 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Gdynia in September
Gdynia in September gets highs of 18°C (64°F) during the day and drops to 12°C (54°F) at night. The difference between afternoon and evening temperatures is usually noticeable. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Gdynia.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Poland, check out our Gdynia's climate page.
Gdynia Temperature in September
Min Temperature
12°C (54°F)
Max Temperature
18°C (64°F)
Chance of Rain
51%
Precipitation
74 mm (2.9 in)
Rainy days
15 days
Humidity
78%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Gdynia typically drop from around 19°C (66°F) at the start of September to approximately 15°C (59°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 12°C (54°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Gdynia in September
Browse day-by-day weather records for Gdynia spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Gdynia historical weather extremes in September
The extremes listed below come from historical weather data collected in Gdynia from 1976 through 2025.
- The hottest September day on record in Gdynia reached 29°C (84°F) (September 11, 2012).
- The coldest September day was on September 30, 1993, with a maximum of 8°C (46°F).
- The coldest night in September in Gdynia was on September 27, 1986, with a minimum of -2°C (28°F).
Best Places in Poland in September
Find out more about the weather in Poland and which places have the best travel conditions in this month. See all of Poland in September →
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What to Wear in Gdynia in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days.What To Do in Gdynia in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Poland, check out our Gdynia's climate page.
See the full Gdynia climate overview or explore weather in Poland.
