Last updated: August 27, 2025
Gdynia in September offers a delightful mix of mild temperatures and moderate humidity, making it an ideal time to explore this coastal gem. With maximum temperatures reaching 28°C (83°F) and an average of 15°C (59°F), the weather is generally pleasant, although it can dip to a cool minimum of 6°C (43°F) during the night. Expect 79 mm (3.1 in) of rainfall spread over 12 days, adding a refreshing touch to the air. The average humidity of 81% creates a slightly humid atmosphere, perfect for enjoying the scenic beauty and vibrant culture Gdynia has to offer.
In Gdynia, Poland, September marks a delightful transition from the warmth of summer to the crispness of autumn. With temperatures ranging from a comfortable 6°C (43°F) at night to a cheerful 28°C (83°F) during the day, this month showcases a pleasant average of 15°C (59°F). The lingering warmth of summer can be felt, as highs remain close to those of August, making it an ideal time for outdoor activities and coastal strolls. As September progresses, the days gradually shorten, hinting at the cooler months ahead, yet the vibrant atmosphere remains, offering a lovely balance of warmth and the beginnings of autumn's embrace.
In September, Gdynia experiences a notable shift in precipitation, recording 79 mm (3.1 inches) of rain over 12 days. This increase from August’s 71 mm highlights an upward trend as the summer warmth gives way to the dampness of autumn. Interestingly, September's rainfall marks a significant jump, as it surpasses most spring and summer months, indicating a transition in weather patterns. The consistent increase in precipitation during this month sets the stage for October's even heavier rainfall, which averages 85 mm (3.4 inches). As the days grow shorter and cooler, the rhythm of Gdynia's weather reflects the natural ebb and flow of the changing seasons.
As summer fades into autumn, September in Gdynia brings a shift in humidity levels, rising to 81% from the consistent 76% average of the previous summer months. This modest increase signals the transition toward the moister conditions typical of fall and winter. While September’s humidity remains lower than the peak winter months, which hover around 89%, it nonetheless sets the stage for the cooler, more humid months ahead, particularly as October approaches with its 86% humidity. This gradual shift reflects Gdynia's coastal climate, where humidity levels tend to rise in line with seasonal changes, creating a rich tapestry of conditions that mark the ebb and flow of the year.
As the warm days of summer fade, September in Gdynia, Poland, sees a shift in the UV Index, dropping to a moderate level of 5. This indicates a change from the high UV levels of the preceding months, when residents and visitors faced a daily burn time of just 25 minutes. With September's exposure category marked as moderate, individuals can enjoy the outdoors with a slightly longer burn time of 30 minutes, but vigilance remains key to skin protection. Observing the trends from January to September, there's a clear transition from low UV levels in winter to higher values in summer, before tapering off in the early fall. For details about the UV Index throughout the year, visit Gdynia UV Index.
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As summer gracefully transitions to autumn, September in Gdynia, Poland offers a delightful respite with 307 hours of sunshine, marking a gentle decline from the peak of summer. This month stands as a bridge between the vibrant, sun-drenched days of July and August, which boasted robust sunny hours of 434 and 392, respectively. The sunlit hours begin to fade, reflecting a trend where the days grow shorter, yet September still provides ample opportunities for enjoying outdoor activities and the beautiful coastal scenery. As the year progresses into October, sunshine availability decreases further to 238 hours, signaling the approach of the cooler, more subdued months ahead. Thus, September remains a cherished time in Gdynia, where golden rays begin to soften, inviting residents and visitors alike to savor the last warm embraces of summer before autumn sets in.
In Gdynia, Poland, the chances of experiencing sunny weather in September stand at a modest 36%, indicating a slight dip from the summer months. While June enjoys the highest likelihood of sunshine at an impressive 61%, the sun's presence begins to wane as autumn approaches. July and August see a drop, with chances falling to 41% and 30%, respectively. As the transition into autumn progresses, the likelihood of sunshine stabilizes somewhat but remains under the favorable conditions of summer. This trend illustrates that while September still has a fair share of sunny days, it's a time when locals and visitors alike should brace for the mellowing warmth of the coming season.
As September unfolds in Gdynia, Poland, the daylight begins to gradually wane, with residents enjoying around 12 hours of sunshine—a delightful balance between the summer's vibrant glow and the approaching autumn chill. This month marks a subtle transition, as the daylight hours decline from the 16 hours of brightness experienced in May and June. Following the warm heights of summer, where daylight peak reaches 17 hours in June, September heralds the beginning of shorter days, paving the way for an atmospheric change. While still basking in the glory of lingering summer light, Gdynia is gradually preparing for the cozy embrace of autumn, reminding us of the natural rhythms that define this beautiful coastal city.
As September arrives in Gdynia, the average wind speed holds steady at 4.7 m/s (11 mph), mirroring the gentle breezes of August. This slight persistence in windiness marks a transition from the milder summer months into the more dynamic fall season. Notably, the winds begin to pick up in the following months, with October seeing an increase to 5.7 m/s (13 mph). This gradual shift hints at the approaching chill of winter, contrasting with the summer's languid flows. Overall, September serves as a bridge in Gdynia's yearly wind pattern, where the calm of summer begins to give way to the invigorating gusts of autumn.
Weather in Gdynia varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Gdynia, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is generally mild, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F) and an average of 15°C (59°F). This month also sees a fair amount of rainfall, totaling 79 mm (3.1 in) over about 12 days, with humidity levels around 81%. In contrast, January is characterized by much colder temperatures, with a minimum of -13°C (8°F) and an average of just 1°C (34°F), peaking at 10°C (51°F). Although there is less precipitation at 54 mm (2.1 in) over the same number of days, the humidity is slightly higher at 89%. For more detailed weather information in January, check Gdynia weather in January.
In comparing the weather between September and February, we observe significant differences in temperature and overall conditions. September boasts a mild temperature range with a minimum of 6°C (43°F) and a maximum of 28°C (83°F), making it feel quite pleasant with an average of 15°C (59°F). In contrast, February is much colder, with temperatures dipping to a minimum of -13°C (9°F) and reaching a maximum of only 13°C (55°F), resulting in a stark average of 1°C (34°F).
Furthermore, September experiences higher precipitation levels, totaling 79 mm (3.1 in) over 12 days, while February sees less rain, at 45 mm (1.8 in) across 11 days. Despite the lower precipitation, February carries a slightly higher humidity level of 89%, compared to September's 81%. For a more detailed look at February conditions, you can check out Gdynia weather in February.
In comparing the weather between September and March, it's evident that September offers milder temperatures with averages around 15°C (59°F), peaking at a warm 28°C (83°F). In contrast, March experiences much colder conditions, with average temperatures hovering around 3°C (37°F) and a maximum of only 14°C (58°F). While September sees more rainfall, totaling 79 mm (3.1 in) over 12 days, March has less precipitation at 52 mm (2.0 in) across 13 days. Humidity levels are also slightly lower in September at 81%, compared to the higher 88% in March. For a more detailed look at March weather, check out this link: Gdynia weather in March.
September and April present distinct weather patterns, showcasing the transition from summer to autumn and from winter to spring, respectively. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 28°C (83°F), with an average of 15°C (59°F). This month experiences relatively high humidity at 81% and receives about 79 mm (3.1 in) of precipitation over 12 days. In contrast, April has cooler temperatures, with a minimum of -3°C (26°F) and a maximum of 20°C (69°F), averaging just 7°C (44°F). This month is less rainy, accumulating 38 mm (1.5 in) of precipitation over 9 days, and maintains a slightly higher humidity level of 84%. For a closer look at April weather specifics, visit Gdynia weather in April.
In comparing the weather of September and May, September tends to be warmer, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F), and an average temperature of 15°C (59°F). In contrast, May features cooler temperatures, with a minimum of 0°C (33°F) and a maximum of 24°C (76°F), averaging at 11°C (52°F). Precipitation levels are slightly higher in September, with 79 mm (3.1 in) over 12 rainy days, compared to May's 67 mm (2.6 in) over 13 days. Humidity is also higher in September at 81%, compared to May's 76%. For more insights on May weather, you can explore Gdynia weather in May.
September and June exhibit notable differences in weather characteristics. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 28°C (83°F), with an average of 15°C (59°F). The month experiences higher humidity at 81% and more precipitation, totaling 79 mm (3.1 in) over approximately 12 days. In contrast, June features slightly warmer temperatures, with a minimum of 6°C (42°F) and a maximum of 29°C (85°F), and an average of 17°C (63°F). June also has less precipitation, with 65 mm (2.6 in) across about 10 days, and lower humidity at 76%. For further details, you can check Gdynia weather in June.
In comparing the weather of September to July, September generally presents cooler temperatures with a minimum of 6°C (43°F), an average of 15°C (59°F), and a maximum of 28°C (83°F). In contrast, July is warmer, featuring a minimum of 10°C (50°F), an average of 18°C (65°F), and reaching a high of 30°C (86°F). Additionally, September experiences more rainfall than July, with 79 mm (3.1 in) over 12 days compared to July's 104 mm (4.1 in) across 15 days. Humidity levels are slightly higher in September at 81%, whereas July's humidity averages around 76%. For more details on July weather, visit Gdynia weather in July.
In comparing the weather of September and August, we see a transition from the warmer late summer days to the cooler onset of autumn. August tends to be slightly warmer, with average temperatures around 18°C (65°F) and maximums reaching 29°C (85°F), while September has lower averages of 15°C (59°F) and maximums of 28°C (83°F). Additionally, September experiences slightly more precipitation, with 79 mm (3.1 in) over 12 rainy days compared to August's 71 mm (2.8 in) across 13 days. Humidity is also higher in September at 81%, compared to August's 76%. For a more in-depth look at August weather, you can visit Gdynia weather in August.
September typically features a warmer climate with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F), accompanied by an average temperature of 15°C (59°F). The month receives about 79 mm (3.1 in) of precipitation, spread across 12 days, and exhibits a humidity level of 81%. In contrast, October experiences significantly cooler temperatures, dipping to a low of 3°C (37°F) and peaking at 20°C (68°F), with an overall average of 11°C (51°F). Rainfall increases slightly to 85 mm (3.4 in), occurring over 16 days, and humidity rises to 86%. For more detailed insights into the expected weather conditions, you can refer to Gdynia weather in October.
In September, the weather is typically mild, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F) and an average of 15°C (59°F). This month experiences relatively high humidity at 81% and a total precipitation of 79 mm (3.1 in) spread over 12 days. In contrast, November brings significantly colder temperatures, with a minimum of -4°C (26°F), an average of 6°C (43°F), and a maximum of 15°C (59°F). The level of humidity rises to 89%, and while precipitation decreases to 56 mm (2.2 in), it occurs over more days, totaling 15. For more specific details on the climate during this month, check out the Gdynia weather in November.
In September, the weather is relatively mild with an average temperature of 15°C (59°F), ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F). This month experiences around 79 mm (3.1 in) of precipitation over approximately 12 days, accompanied by a humidity level of 81%.
In contrast, December brings much colder temperatures, with an average of just 2°C (36°F) and a minimum that can drop to -9°C (17°F). The maximum temperature reaches up to 10°C (50°F). Although December sees less precipitation at 63 mm (2.5 in), it occurs over a longer period of 15 days, and the humidity increases to 89%. For a closer look at winter weather conditions, visit Gdynia weather in December.
As September unfolds in Gdynia, it brings a serene transition from the warmth of summer to the cool embrace of autumn. With an average temperature hovering around 15°C (59°F), September is notably milder compared to the scorching peaks of July and August. The month experiences a mix of sunny days and occasional rain, contributing to a substantial 79 mm of precipitation over approximately half the month. This increase in humidity, reaching 81%, adds a crispness to the air that heralds the changing seasons. For those interested in exploring the broader climatic patterns of this vibrant coastal city, check out Gdynia Climate for more insights.