Last updated: August 27, 2025
Gniezno, Poland, experiences a diverse range of weather in September, with temperatures soaring to a maximum of 33°C (93°F) and dipping as low as 3°C (37°F). The average temperature hovers around 15°C (59°F), offering a pleasant climate. However, residents and visitors should prepare for occasional showers, as the month brings about 62 mm (2.5 in) of precipitation over approximately 10 days. With humidity levels reaching 78%, the air can feel quite muggy at times. Embrace the beauty of early autumn in Gniezno, where warm days and refreshing rain create a unique atmosphere.
In September, Gniezno experiences a refreshing transition as summer gracefully gives way to autumn. With minimum temperatures around 3°C (37°F) and an average of 15°C (59°F), the air becomes noticeably cooler yet remains comfortable for outdoor activities. Daytime highs can still reach up to 33°C (93°F), allowing for those warm, sunny days that extend the pleasures of summer. This month marks a significant drop from the intense heat of July and August, highlighting a trend towards milder weather as the year progresses. Charming autumnal hues begin to emerge, making September a beautiful time to explore the city and its surroundings.
In September, Gniezno, Poland, experiences a notable consistency in precipitation, with 62 mm (2.5 in) of rain spread over approximately 10 days. This marks a slight decline from the summer months, where July and August saw significantly higher totals of 97 mm and 68 mm, respectively. The trend suggests a transition into autumn, as the amount of rain typically decreases after the summer peak, leading into the drier months of October and November. Despite the diminishing rainfall, September retains a balanced atmospheric character, providing a refreshing backdrop as nature begins to shift towards the vibrant hues of fall.
In September, Gniezno experiences a noticeable shift in humidity, with levels averaging at 78%. This marks a decline from the summer months, where the humidity consistently hovered around 67%. As the town transitions from the warm embrace of summer into the refreshing touch of fall, September's humidity remains relatively high, but it's a clear sign of the approaching cooler seasons. This trend continues into October, where humidity rises again to 84%, reminding residents that while autumn brings a change in temperature, the air remains notably damp. Overall, Gniezno's humidity dances with the seasons, reflecting the gradual move from summer's dryness to the wetter months of autumn and winter.
As September unfolds in Gniezno, Poland, residents can expect a UV Index of 6, categorizing it as a high exposure month with a burn time of just 25 minutes. This trend marks a gradual decline from the intense very high levels seen in July and June, when the index reached 8. However, September still calls for caution under the sun, especially as outdoor activities pick up with the onset of autumn. The shift from summer's peak UV intensity to a somewhat milder, yet still significant, exposure serves as a reminder for sun protection. For more detailed insights, visit Gniezno UV Index.
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As summer fades, September in Gniezno, Poland, brings a delightful shift in sunshine, offering 292 hours of radiant light. This month signifies a gradual transition from the peak summer warmth, where June and July bask in over 400 hours of sun, to the cooler months ahead. While September's sunshine reflects a decrease compared to the vibrant summer months of June and July, it still retains a generous brightness, comfortably outshining the dimmer days of October, which only sees 244 hours. This trend showcases the lingering warmth of early autumn, inviting residents and visitors to relish the stunning hues of changing leaves under the soft embrace of September's sun.
In Gniezno, Poland, September offers a pleasant balance of sunny weather, with chances of sun reaching 36%. This is a slight dip from the summer peak of 54% in June and a modest increase over the preceding months of July and August, which hover around 33% and 31%, respectively. Interestingly, the likelihood of sunny days tends to rise again in October, reaching 42%, suggesting a warm transition into autumn. Overall, while September may not boast the sunniest days, it certainly provides a welcoming respite before the colder months set in, making it a lovely time to enjoy the outdoors in Gniezno.
As summer fades, September in Gniezno, Poland, witnesses a gentle decline in daylight, offering about 12 hours of sunlight—a noticeable shift from the vibrant 16 hours enjoyed in the peak months of June and July. This transitional month hints at the approaching autumn, as the daylight gradually shortens, following the earlier exuberance of summer with its long, sun-soaked days. While the days grow shorter, the lingering warmth of early fall beckons residents outdoors, providing a beautiful balance of light that stands between the long days of summer and the crisp shorter days of October, where daylight reduces to 10 hours. This rhythm of shifting daylight beautifully encapsulates the passage of the seasons, inviting reflection on nature's cyclical dance.
As September rolls into Gniezno, Poland, the average wind speed holds steady at 3.6 m/s (8 mph), echoing the patterns established in earlier months like January and February. This consistency reflects a transitional period, as the summer calm gives way to the more invigorating breezes of fall. Following a gradual uptick in wind speeds from April’s 3.8 m/s to May’s 4.0 m/s, the winds begin to shift lightly in local anticipation of the brisker conditions ahead in October and November, both promising a notable increase at 4.2 m/s. Overall, September serves as a bridge, offering a balance of gentle summer winds while hinting at the energetic gusts to come.
Weather in Gniezno varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Gniezno, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather conditions. In September, temperatures range from a mild 3°C (37°F) to a warm maximum of 33°C (93°F), with an average of 15°C (59°F). The month experiences around 62 mm (2.5 in) of precipitation over 10 days, along with a humidity level of 78%. In stark contrast, January sees much colder temperatures, with a minimum of -18°C (0°F) and a maximum of only 12°C (54°F), averaging just 1°C (33°F). Although it has slightly less precipitation at 43 mm (1.7 in) over the same number of rainy days, the humidity rises to 90%. For those looking to explore the typical conditions of January, more information can be found at Gniezno weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures can range from a cool 3°C (37°F) at night to a warm 33°C (93°F) during the day, with an average of around 15°C (59°F). The month sees about 62 mm (2.5 in) of precipitation spread over 10 days, accompanied by a humidity level of 78%. In contrast, February is much colder, with temperatures dipping as low as -15°C (5°F) and peaking at a moderate 18°C (64°F), averaging around 1°C (35°F). It receives less precipitation, about 43 mm (1.7 in) across 9 days, but the humidity is notably higher at 90%. For more specific weather details, refer to Gniezno weather in February.
When comparing the weather in September and March, we observe distinct differences in both temperature and humidity. September typically enjoys a wider temperature range, with minimums around 3°C (37°F) and highs reaching up to 33°C (93°F), creating an average of 15°C (59°F). In contrast, March experiences much colder conditions, with temperatures dipping as low as -14°C (6°F) and peaking at 19°C (67°F), yielding an average of only 4°C (40°F). Additionally, September has a lower precipitation rate of 62 mm (2.5 in) over about 10 days, while March sees less rain at 40 mm (1.6 in), but with slightly higher humidity levels at 87%. For more detailed information about the conditions in March, you can visit Gniezno weather in March.
September and April present markedly different weather patterns. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 33°C (93°F), with an average of 15°C (59°F). The month experiences about 62 mm (2.5 in) of precipitation over approximately 10 days, accompanied by a relatively high humidity of 78%. In stark contrast, April sees cooler temperatures, with a minimum of -4°C (26°F) and a maximum of 27°C (81°F), averaging around 9°C (48°F). The month receives less precipitation at 38 mm (1.5 in) over about 9 days, while humidity remains similarly high at 80%. For more detailed information, you can check Gniezno weather in April.
In September, temperatures can range significantly from a chilly 3°C (37°F) at night to a warm 33°C (93°F) during the day, with an average of 15°C (59°F). The month sees about 62 mm (2.5 in) of precipitation over approximately 10 days and maintains a higher humidity level at 78%. In contrast, May experiences milder temperatures, with a minimum of 0°C (32°F) and a maximum of 29°C (85°F), averaging around 13°C (56°F). Precipitation in May is slightly higher at 73 mm (2.9 in), occurring over 12 days, while the humidity is lower at 67%. For more details on May weather, you can check Gniezno weather in May.
When comparing the weather in September and June, we see some notable differences. September experiences a wider temperature range, with minimum temperatures dropping to 3°C (37°F) and maximums reaching up to 33°C (93°F). In contrast, June starts off slightly warmer, with minimums around 5°C (41°F) and peak temperatures soaring to 36°C (97°F). Additionally, September has a higher humidity level at 78%, while June is comparatively drier at 67%. Precipitation in both months is somewhat similar, with September recording 62 mm (2.5 in) over approximately 10 days and June slightly higher at 76 mm (3.0 in) over 11 days. For a detailed look at what to expect during June, visit Gniezno weather in June.
In comparing the weather between September and July, September tends to have a wider range of temperatures, with minimums as low as 3°C (37°F) and maximums reaching up to 33°C (93°F), averaging 15°C (59°F). In contrast, July's temperatures are generally milder, with minimums at 8°C (46°F) and maximums peaking at 37°C (98°F), averaging 19°C (67°F). Rainfall is more frequent in July, with 97 mm (3.8 in) recorded over 12 days, compared to September's 62 mm (2.5 in) over 10 days. Additionally, September's humidity is relatively higher at 78%, while July sees a more comfortable 67%. For a detailed view of July's conditions, you can check Gniezno weather in July.
In comparing the weather of September with that of August, it is evident that September experiences cooler temperatures, with minimums dipping to 3°C (37°F) compared to August's warmer minimum of 6°C (43°F). While both months have similar maximum temperatures reaching up to 33°C (92-93°F), September's average temperature falls to 15°C (59°F), significantly lower than August's 20°C (68°F). Additionally, September sees slightly less precipitation at 62 mm (2.5 in) over 10 days, while August has 68 mm (2.7 in) over 9 days. The humidity is also higher in September at 78%, compared to August's 67%. For more detailed weather insights, you can visit Gniezno weather in August.
September and October present a notable shift in weather patterns. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 33°C (93°F), with an average of 15°C (59°F). The month sees around 62 mm (2.5 in) of precipitation over 10 days, accompanied by a humidity level of 78%. In contrast, October experiences cooler temperatures, with a minimum of -2°C (28°F), an average of 11°C (51°F), and a maximum of 24°C (76°F). Precipitation remains somewhat similar at 61 mm (2.4 in) across 11 days, while humidity increases to 84%. For a detailed look at October weather specifics, visit Gniezno weather in October.
The weather in September is marked by warmer temperatures, with minimums around 3°C (37°F) and maximums reaching up to 33°C (93°F), resulting in an average of 15°C (59°F). In contrast, November brings much cooler conditions, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 18°C (65°F) and an average of only 6°C (43°F). While September experiences more rainfall (62 mm over 10 days) and lower humidity at 78%, November sees less precipitation (39 mm over 7 days) but higher humidity levels at 89%. For more detailed information on November's climate, visit Gniezno weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a mild 15°C (59°F) on average to a warm maximum of 33°C (93°F), accompanied by a relatively moderate humidity of 78%. This month experiences around 62 mm (2.5 inches) of precipitation over about 10 days, indicating a mix of sun and rain. Conversely, December brings a chilling drop in temperature, with averages hovering around 2°C (36°F) and a maximum of only 13°C (56°F). The minimum can plunge to a frigid -17°C (1°F), compounded by higher humidity levels of 92%. While December has less precipitation at 46 mm (1.8 inches), it occurs over 11 days, suggesting persistent cold and damp conditions. For more insights into December weather, check out Gniezno weather in December.
As we transition into September, Gniezno experiences a noticeable shift in weather compared to the sweltering summer months. Average temperatures cool significantly, hovering around a refreshing 15°C (59°F) while maximum highs can reach a warm 33°C (93°F), reminding us of summer's lingering warmth. Additionally, with 62 mm of precipitation over approximately 10 days, the month becomes one of the wetter times of the year, contributing to the lush landscape that welcomes the start of autumn. Humidity remains high at 78%, adding to the changing atmosphere. For an in-depth understanding of Gniezno's climatic patterns, explore Gniezno Climate.