Last updated: August 21, 2025
September in Uusikaupunki, Finland showcases a transitional climate as summer fades into autumn. The maximum temperature reaches a pleasant 23°C (73°F), while the average temperature settles around a cool 13°C (55°F), dipping to a brisk minimum of 2°C (35°F). This month witnesses an averaging precipitation of 71 mm (2.8 in) spread over 12 days, reflecting the shift in weather patterns. With humidity levels hovering at a high 86%, residents and visitors alike can expect a blend of crisp air and occasional rain, creating a quintessential early autumn experience in this charming coastal town.
In Uusikaupunki, Finland, September marks the onset of autumn, bringing a refreshing shift in temperatures as the summer warmth begins to fade. With daily averages around 13°C (55°F), the month features a comfortable and crisp climate, with highs reaching up to 23°C (73°F) and lows dipping to 2°C (35°F). This transitional period showcases a notable decline from the milder summer months, setting the stage for the cooler days ahead. As leaves start to change and the landscape takes on hues of gold and crimson, September offers a picturesque backdrop, inviting residents and visitors alike to embrace the beauty of nature's transformation.
In Uusikaupunki, Finland, September marks a notable transition in the weather patterns, featuring a precipitation of 71 mm (2.8 in) over 12 days. This amount is slightly less than the preceding month of August, which recorded 73 mm (2.9 in), highlighting a gradual shift as summer wanes. Notably, September's rainfall is significant, suggesting the onset of autumn, while the frequency of rainy days remains consistent, mirroring the increased wetness that characterizes the months heading into winter. As the year progresses, precipitation levels typically rise, with October expected to deliver even more rain, reinforcing the trend towards wetter conditions in the fall months.
September in Uusikaupunki, Finland, brings a noticeable shift in humidity, settling at 86%. This marks a return to moister air after the comparatively drier months of May, June, July, and August, which hovered around 77% to 79%. As autumn approaches, the humidity level begins to climb once again, reminiscent of the winter months where levels peak between 90% and 92%. This trend signifies the transition from the summer's mildness back into the cooler, more humid conditions typical of the later months of the year, setting the stage for the crisp Finnish fall.
September in Uusikaupunki, Finland, sees a moderate UV Index of 4, making it essential for outdoor enthusiasts to be mindful of sun exposure. As summer fades, the UV ratings drop from the peak highs of July and August, reflecting a transition towards lower sunlight intensity. With a burn time of just 30 minutes, this month serves as a reminder that sun safety remains important, even as temperatures begin to cool. As you enjoy the crisp air, don't forget to check the Uusikaupunki UV Index for real-time updates to ensure you're always protected while soaking up those precious rays!
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September in Uusikaupunki, Finland, brings a graceful transition from the vibrant summer months to the cooler embrace of autumn. With 311 hours of sunshine, it stands as a significant drop from the sun-soaked heights of June and July, which basked in almost 500 hours. This steady decline becomes evident in the gradual descent of daylight as September greets the changing leaves. While still abundant compared to the winter months, such as January with merely 62 hours, September serves as a reminder of the shifting seasons. The sunlight in this month often feels like a warm farewell, gently illuminating the landscape as nature prepares for its winter slumber.
As summer fades into autumn, the likelihood of sunny weather in Uusikaupunki, Finland experiences a gradual decline in September, with a 32% chance of sunshine. This marks a notable decrease from the peak of 60% in July, as the days grow shorter and the crispness of fall begins to set in. Interestingly, while the sunny days dwindle, September still holds a better chance of clear skies compared to the colder months that follow, such as October with only 18% sunshine. Overall, the patterns suggest that while summer's brightness is giving way to autumn's chill, September still offers some opportunities to bask in the sun before winter's arrival.
In September, Uusikaupunki, Finland experiences a noticeable transition as daylight begins to wane, offering around 12 hours of sunlight. This marks a decrease from the 15 hours enjoyed in August, signaling the shift from the height of summer towards the shorter days of autumn. As the month progresses, the gentle fading of daylight hints at the impending autumnal equinox, where daylight and darkness find a delicate balance. Following the vibrant daylight of June and July, which saw nearly 19 hours, September's softer light creates a serene backdrop for the changing foliage as nature prepares for the colder months ahead. This consistent ebb and flow of daylight not only reflects the rhythm of the seasons but also enriches the charm of Uusikaupunki throughout the year.
As autumn approaches in Uusikaupunki, Finland, the September winds blow with an average speed of 4.5 m/s (10 mph), mirroring the gentle breezes of August. This continuity hints at the lingering warmth of summer before the winds pick up in October, increasing to 6.1 m/s (14 mph). Over the months, one can observe a subtle decline in wind speed from spring's lively gusts, peaking at 5.4 m/s (12 mph) in March, down to a calmer summer, where speeds hover between 3.7 m/s and 4.5 m/s. As the year progresses, the winds regain strength, evident with sharper increases into autumn and winter. This seasonal rhythm not only shapes the weather but also enriches the coastal charm of Uusikaupunki, beckoning both locals and visitors alike to embrace the brisk, invigorating air of September.
Weather in Uusikaupunki varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Uusikaupunki, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in September and January, the contrast is striking. September offers mild temperatures with a minimum of 2°C (35°F) and an average of 13°C (55°F), reaching a pleasant maximum of 23°C (73°F). In contrast, January experiences much colder conditions, with temperatures plummeting to a low of -17°C (1°F) and averaging around -1°C (31°F), peaking at only 8°C (46°F). While September sees a fair amount of rainfall with 71 mm (2.8 in) over about 12 days, January is drier with 45 mm (1.8 in) across approximately 10 days, albeit with higher humidity of 92% compared to September's 86%. For a more detailed view, check out Uusikaupunki weather in January.
September and February present stark contrasts in weather. In September, temperatures range from a mild 2°C (35°F) at night to a pleasant 23°C (73°F) during the day, with an average of 13°C (55°F). However, it experiences significant rainfall, totaling 71 mm (2.8 in) over about 12 days, and humidity levels hover around 86%. In contrast, February is characterized by much colder conditions, with nighttime temperatures dropping to a frigid -19°C (-2°F) and daytime highs reaching only 7°C (44°F), averaging at -2°C (28°F). Precipitation in February is lighter, at 40 mm (1.6 in), occurring over 8 days, but humidity remains high at 90%. For a more detailed look at February weather, you can visit Uusikaupunki weather in February.
In September, temperatures range from a chilly 2°C (35°F) at night to a pleasant maximum of 23°C (73°F) during the day, making it a generally mild month with an average temperature of 13°C (55°F). However, it also experiences considerable precipitation, with around 71 mm (2.8 in) spread over 12 days, and humidity levels reaching 86%. In contrast, March is far colder, with temperatures dipping as low as -21°C (-6°F) at night and only reaching a maximum of 10°C (51°F) during the day, resulting in an average temperature of 0°C (33°F). It sees less rainfall, totaling about 41 mm (1.6 in) over 9 days, while maintaining a slightly higher humidity of 89%. For more specific details on the weather conditions, you can check out Uusikaupunki weather in March.
September and April present distinct weather patterns that reflect the transition between summer and autumn in the former, and late winter to spring in the latter. In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 23°C (73°F), with an average of 13°C (55°F), and the month experiences 71 mm (2.8 in) of precipitation over 12 days with a humidity level of 86%. In contrast, April is generally colder, featuring a minimum temperature of -7°C (19°F) and a maximum of 18°C (65°F), with an average of 4°C (39°F). Precipitation in April is significantly lower at 29 mm (1.2 in) over 8 days, accompanied by a similar humidity level of 85%. For more details about April weather, you can visit Uusikaupunki weather in April.
September and May exhibit distinct differences in weather patterns. While both months can reach a maximum temperature of 23°C (73°F), September tends to be warmer on average, with temperatures ranging from a minimum of 2°C (35°F) to an average of 13°C (55°F). In contrast, May starts off cooler, experiencing minimum temperatures as low as -2°C (30°F) and an average of 9°C (48°F). Additionally, September sees more precipitation, averaging 71 mm (2.8 in) over 12 days, compared to May's 38 mm (1.5 in) over just 7 days. The humidity is also higher in September at 86%, while May has a more moderate level at 77%. For a closer look at May's weather in Uusikaupunki, you can visit Uusikaupunki weather in May.
In comparing the weather of September and June, we can see noticeable differences in temperature and precipitation. September tends to be cooler, with average temperatures ranging from a minimum of 2°C (35°F) to a maximum of 23°C (73°F), while June is warmer, with temperatures varying from a minimum of 4°C (40°F) to a maximum of 27°C (81°F). Additionally, September experiences higher precipitation levels, accumulating 71 mm (2.8 in) over 12 days, compared to June's 40 mm (1.6 in) over just 7 days. Humidity is also higher in September at 86%, compared to June's 78%. For a more detailed look at the June weather, you can check Uusikaupunki weather in June.
In September, the weather is notably cooler than in July, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 23°C (73°F), while July enjoys a warmer range of 9°C (48°F) to 30°C (86°F). The average temperature in September is around 13°C (55°F), whereas July boasts a higher average of 17°C (64°F). Precipitation levels are relatively similar, with September receiving 71 mm (2.8 in) over 12 days and July slightly less at 67 mm (2.6 in) across 10 days. Additionally, September has a higher humidity level at 86%, compared to July's 78%. For more details on July weather, check out Uusikaupunki weather in July.
In comparing the weather of September and August, September shows a notable drop in both minimum and average temperatures. While August enjoys milder conditions with a minimum of 7°C (45°F) and an average of 17°C (62°F), September's temperatures range from a chilly 2°C (35°F) minimum to a comfortable 23°C (73°F) maximum, averaging just 13°C (55°F). Additionally, while both months experience similar levels of precipitation, September sees slightly less at 71 mm (2.8 in) compared to August's 73 mm (2.9 in) across the same number of days. The humidity also increases in September, reaching 86%, compared to August’s 79%. For more detailed information, you can check the Uusikaupunki weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 23°C (73°F), with an average of 13°C (55°F). The month sees a total precipitation of 71 mm (2.8 in) spread over 12 days and an humidity level of 86%. In contrast, October experiences cooler weather, with temperatures dipping to a minimum of -4°C (25°F) and averaging 8°C (46°F), peaking at 17°C (62°F). Precipitation increases to 90 mm (3.5 in) over 17 days, coupled with a slight rise in humidity to 90%. For more detailed information, check out Uusikaupunki weather in October.
In comparing the weather between September and November, it becomes clear that September tends to be milder, with average temperatures reaching up to 13°C (55°F) and maximums hitting 23°C (73°F). The month experiences significant humidity at 86% and a total precipitation of 71 mm (2.8 in) over 12 days. In contrast, November sees a notable drop in temperatures, with an average of 4°C (40°F) and maximums only reaching 13°C (56°F), while minimum temperatures can plunge to -7°C (19°F). The precipitation in November is slightly less at 59 mm (2.3 in), but humidity increases to 91%, contributing to a distinctly colder and damp atmosphere. For more detailed information, you can check Uusikaupunki weather in November.
Comparing September and December weather reveals a significant shift in temperature and conditions. September experiences milder temperatures, with a minimum of 2°C (35°F), an average of 13°C (55°F), and a maximum of 23°C (73°F). During this month, precipitation totals around 71 mm (2.8 in) across 12 days, accompanied by a relatively high humidity of 86%. In contrast, December brings much colder weather, with a minimum of -16°C (3°F), an average of 1°C (33°F), and a maximum of 7°C (45°F). Precipitation increases slightly to 77 mm (3.0 in) over 14 days, while humidity remains high at 89%. For more detailed information on December weather in Uusikaupunki, check out Uusikaupunki weather in December.
As September arrives in Uusikaupunki, it brings a notable shift in the weather compared to the warmer months of summer. The air becomes crisper, with temperatures dipping significantly from the highs of July and August, while occasional rainfall serves as a reminder that autumn is on the horizon. This month typically sees increased humidity, leading to a slightly cooler feel even on relatively mild days. With around half of September's days experiencing precipitation, it's essential to prepare for those refreshing, rain-kissed moments. For an in-depth look at weather trends and patterns throughout the year, visit Uusikaupunki Climate.