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Weather in Gdynia for September 2025

Your guide to Gdynia weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Gdynia is slightly cooler than the historical average by -0.8 °C.

  • Expect cooler weather in the next days in Gdynia with the forecast suggesting a temperature of 18.1 °C, lower than the historical average.

  • In general, the average temperature in Gdynia at the beginning of September is 22 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °C by the end of September.

    • Rain 🌧️

  • The climate of Gdynia in September is notably wet, with an average of 11 rainy days, and a total of 55.3 mm of precipitation.

Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/14°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Gdynia Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Overcast
20°
2
Patchy rain possible
21°
3
Sunny
22°
4
Partly cloudy
24°
5
Partly cloudy
24°
6
Partly cloudy
21°
7
Partly cloudy
22°
8
Sunny
24°
9
Heavy rain at times
23°
10
Moderate rain at times
20°
11
Patchy rain possible
19°
12
Heavy rain at times
18°
13
Moderate rain at times
18°
14
Patchy rain possible
16°
15
Patchy rain possible
18°
16
Patchy rain possible
18°
17
Patchy rain possible
16°
18
Partly cloudy
19°
19
Partly cloudy
23°
20
Sunny
24°
21
Patchy rain possible
16°
22
Sunny
15°
23
Partly cloudy
17°
24
Patchy rain possible
18°
25
Partly cloudy
15°
26
Sunny
16°
27
Partly cloudy
18°
28
Patchy rain possible
21°
29
Patchy rain possible
13°
30
Overcast
13°

Temperatures trend during September in Gdynia

See the weather trend as well as the moving average line

September weather in Gdynia day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
 20° /14° 0 mm 5
2 Sept. Patchy rain possible
Patchy rain possible
 21° /15° 2.3 mm 5
3 Sept. Sunny
Sunny
 22° /16° 0 mm 6
4 Sept. Partly cloudy
Partly cloudy
 24° /17° 0 mm 6
5 Sept. Partly cloudy
Partly cloudy
 24° /17° 1.5 mm 6
6 Sept. Partly cloudy
Partly cloudy
 21° /16° 0.6 mm 5
7 Sept. Partly cloudy
Partly cloudy
 22° /16° 0.2 mm 6
8 Sept. Sunny
Sunny
 24° /17° 0.2 mm 6
9 Sept. Heavy rain at times
Heavy rain at times
 23° /17° 1.5 mm 6
10 Sept. Moderate rain at times
Moderate rain at times
 20° /14° 2.8 mm 5
11 Sept. Patchy rain possible
Patchy rain possible
 19° /13° 14.1 mm 4
12 Sept. Heavy rain at times
Heavy rain at times
 18° /13° 3.9 mm 5
13 Sept. Moderate rain at times
Moderate rain at times
 18° /12° 6.3 mm 5
14 Sept. Patchy rain possible
Patchy rain possible
 16° /15° 2.4 mm 4
15 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 3.3 mm 0.5
16 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 0.6 mm 0.7
17 Sept. Patchy rain possible
Patchy rain possible
 16° /13° 0.1 mm 0.7
18 Sept. Partly cloudy
Partly cloudy
 19° /14° 0.1 mm 0.8
19 Sept. Partly cloudy
Partly cloudy
 23° /16° 0.1 mm 1.1
20 Sept. Sunny
Sunny
 24° /16° 0 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 16° /13° 1.2 mm 3
22 Sept. Sunny
Sunny
 15° /12° 0 mm 4
23 Sept. Partly cloudy
Partly cloudy
 17° /9° 0 mm 4
24 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 0 mm 3
25 Sept. Partly cloudy
Partly cloudy
 15° /12° 0 mm 4
26 Sept. Sunny
Sunny
 16° /11° 0 mm 4
27 Sept. Partly cloudy
Partly cloudy
 18° /10° 0 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 21° /13° 0.7 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 13° /9° 0.4 mm 3
30 Sept. Overcast
Overcast
 13° /9° 0 mm 3
Next
Important Notice
Our weather forecast for Gdynia in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Gdynia forecast closer to your planned date for the most up-to-date weather information.
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Gdynia in September - FAQ

What are the expected maximum and minimum temperatures in Gdynia during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Gdynia during September?
Moderate rainfall is anticipated in Gdynia during September, with a total of 55.3 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Gdynia during September?
The average wind speed in Gdynia during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Gdynia

Explore the daily rainfall trends and prepare for Gdynias September weather 💧

UV exposure in Gdynia during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Gdynia?

Get accurate weather forecasts for Gdynia, located at latitude 54.519 and longitude 18.532. Stay updated with localized weather information tailored for Gdynia.

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