Last updated: August 21, 2025
September in Rauma, Finland offers a delightful blend of seasonal transitions, with maximum temperatures reaching up to 22°C (71°F) and an average of 13°C (55°F). As autumn sets in, early mornings can be notably crisp, dipping to a minimum of 5°C (41°F). The month is characterized by frequent rain, accumulating about 81 mm (3.2 in) over 13 days, contributing to a muggy humidity level of 86%. This mix of warmth and moisture creates a vibrant atmosphere as the landscape begins to change, making September a fascinating time to experience Rauma's natural beauty.
In September, Rauma, Finland, experiences a gentle transition from the warmth of summer to the cooler embrace of autumn. With temperatures ranging from a minimum of 5°C (41°F) to a comfortable maximum of 22°C (71°F), the month presents a delightful average of 13°C (55°F). This period marks one of the last opportunities to enjoy pleasant outdoor activities, as the days are still relatively warm and inviting. As September unfolds, residents and visitors alike can savor the vibrant autumn hues beginning to surface, creating a picturesque backdrop against the gradually cooling temperatures. This month truly encapsulates a serene shift, inviting reflection and appreciation of nature's changing palette.
September in Rauma, Finland, marks a transition into the wetter autumn months, with precipitation totaling 81 mm (3.2 in) spread across 13 days. This slightly decreases from the preceding months of August, which boasted 83 mm (3.3 in), and highlights a trend of increasing rainfall as the year progresses. The shift from summer dryness to a more consistently soggy atmosphere is evident, particularly as October follows with an even heftier 101 mm (4.0 in) of precipitation over 17 days. This trend suggests that September serves as a pivotal month, bridging the gap between the warmer, drier summer and the wetter, chillier days ahead, setting the stage for an autumn characterized by significant rainfall and frequent downpours.
In September, Rauma, Finland, experiences a notable shift in humidity, with levels reaching 86%. This increase follows a steady decline from the peak of 92% humidity in January to 79% in August, signaling the transition from the drier summer months back to the more humid conditions typical of the autumn season. As September unfolds, humidity levels begin to rise again, aligning with the onset of cooler temperatures in October and November, where humidity stabilizes around the 90% mark. This cyclical pattern highlights Rauma's characteristic blend of moisture-laden air, especially as the long, dark winters approach, creating a unique atmospheric feel in this coastal Finnish town.
As September arrives in Rauma, Finland, the UV Index dips to a moderate level of 3, reflecting the transition into autumn. With a burn time of 30 minutes, it's a reminder that while the summer sun begins to wane, protection against UV rays remains essential. This month marks a decline from the peak summer indices, where July showcased a high UV Index of 6. Interestingly, September echoes the mild conditions of earlier spring months, such as March and April, which also featured moderate UV protection needs. As you enjoy the changing colors of the season, don’t forget to stay aware of the UV levels. For more comprehensive information, check out the Rauma UV Index.
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September in Rauma, Finland, offers a delightful transition into autumn with 301 hours of sunshine, marking a notable change from the vibrant summer months. As the sun gradually retreats, this month still provides a substantial amount of light compared to the preceding months, ensuring that the golden hues of early fall can be savored. Following the peak of 495 hours in June and 492 hours in July, September feels like a gift as daylight begins to diminish, yet it remains a brighter conclusion to the summer season than the stark 198 hours of October. This trend highlights Rauma's enchanting ability to blend the warmth of summer sunshine with the crispness of early autumn, inviting locals and visitors alike to bask in the last glow before winter sets in.
In Rauma, Finland, September marks a notable shift in the likelihood of sunny weather as summer yields to the crispness of autumn. While the chances of sunshine dip to 31%—down from a more robust 62% in July and 54% in June—this still offers a pleasant opportunity for those looking to enjoy the mild early fall days. Following the sunny highs of summer, September serves as a gentle transition, with a sun-kissed memory lingering while darker days begin to loom. Despite the decline, the chance of clear skies remains significantly higher than the frigid winter months, where sunshine often plummets to a mere 7% in January. Thus, September retains a charm, inviting outdoor enthusiasts to soak in the mellow warmth before the chill of autumn fully sets in.
As September rolls into Rauma, Finland, the days begin to noticeably shorten, offering approximately 12 hours of daylight. This marks a gentle transition from the lush long summer days, where daylight peaked at an impressive 19 hours in June. The gradual decrease in sunlight through the months reflects the shift towards autumn, moving from 17 hours in May to 15 in August and down to September's values. While the allure of longer days fades, the crispness of early fall invites a new rhythm of life, as the lingering light of September still offers ample opportunities to enjoy the vibrant scenery before the days shrink further into the depths of winter.
As September unfolds in Rauma, Finland, the gentle breeze sees a slight dip in average wind speed, settling at 5.4 m/s (12 mph). This marks a subtle shift from the more robust gusts of late summer, where August boasted 5.5 m/s. Following the peak winds of spring, which saw 6.7 m/s in March, the transition into autumn brings a calming effect. However, the winds will soon pick up momentum, as October anticipates a brisk 7.6 m/s (17 mph), signaling that Rauma's weather is gearing up for the rich, gusty days of fall. The overall trend showcases a seasonal ebb and flow of the winds, offering a perfect backdrop for leisurely strolls along the coast, as nature prepares for the cooler months ahead.
Weather in Rauma varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rauma, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures begin to shift from the warmth of summer, with average highs around 22°C (71°F) and lows dipping to 5°C (41°F). The month experiences relatively high humidity at 86%, along with 81 mm (3.2 in) of rain over 13 days. By contrast, January brings a stark change, as temperatures plummet to a minimum of -15°C (5°F) and only reaching a maximum of 6°C (44°F), resulting in an average of -1°C (31°F). The month sees less precipitation, totaling 46 mm (1.8 in) across 11 days, but the humidity remains high at 92%. For a closer look at winter conditions, you can check out Rauma weather in January.
In September, the weather is generally mild, with temperatures ranging from a minimum of 5°C (41°F) to an average of 13°C (55°F) and reaching a maximum of 22°C (71°F). This month also sees a fair amount of rainfall, accumulating 81 mm (3.2 in) across approximately 13 rainy days, accompanied by high humidity levels of 86%. In contrast, February is much colder, with temperatures dipping to a minimum of -15°C (5°F) and averaging -2°C (28°F), peaking at only 6°C (43°F). Precipitation is lighter, totaling 42 mm (1.7 in) over 9 days, while humidity remains high at 90%. For more details on weather during this winter month, visit Rauma weather in February.
The weather in September is markedly milder than in March, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 22°C (71°F), averaging around 13°C (55°F). In contrast, March experiences much colder conditions, with temperatures dipping as low as -17°C (1°F) and only reaching a maximum of 7°C (46°F), averaging around 0°C (32°F). September also sees more precipitation, totaling 81 mm (3.2 in) across 13 days, while March has lesser precipitation of 43 mm (1.7 in) over 10 days. Despite the differences in temperature and precipitation, both months maintain high humidity levels, with September at 86% and March slightly higher at 89%. For more details on the weather during March, visit Rauma weather in March.
September and April present contrasting weather as they transition between seasons. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 22°C (71°F) with an average of 13°C (55°F), making it a generally milder month. This period also sees more rainfall, with an average precipitation of 81 mm (3.2 in) over 13 days, coupled with a higher humidity level of 86%. In comparison, April's temperatures are cooler, with a minimum of -3°C (26°F) and a maximum of 16°C (61°F), averaging around 3°C (38°F). Furthermore, April experiences significantly less precipitation, totaling 36 mm (1.4 in) across just 7 days, while maintaining a humidity level of 85%. For a closer look at April's weather specifics, you can visit Rauma weather in April.
In September, temperatures are generally milder, ranging from a minimum of 5°C (41°F) to a comfortable maximum of 22°C (71°F), with an average of 13°C (55°F). This month typically experiences 81 mm (3.2 in) of precipitation over about 13 days, coupled with a higher humidity level of 86%. In contrast, May marks the onset of warmer weather, featuring temperatures that range from a minimum of 0°C (32°F) to a maximum of 19°C (66°F), with an average of 8°C (46°F). The precipitation is significantly lower at 39 mm (1.5 in) across just 7 days, and the humidity levels are relatively lower at 77%. Overall, September boasts warmer days and higher humidity compared to the cooler, drier conditions in May. For more detailed information about May weather, you can visit Rauma weather in May.
When comparing the weather in September and June, a few key differences emerge. In June, temperatures generally range from a minimum of 6°C (42°F) to a maximum of 25°C (78°F), with an average of 14°C (57°F). September, on the other hand, sees slightly cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 22°C (71°F), averaging 13°C (55°F). Additionally, June experiences less precipitation, totaling 42 mm (1.7 in) over about 7 days, compared to September's higher rainfall of 81 mm (3.2 in) spread across approximately 13 days. Humidity levels are also higher in September at 86%, compared to June’s 78%. For more details, you can check Rauma weather in June.
In comparing the weather of September and July, notable differences emerge. September experiences cooler temperatures, with a minimum of 5°C (41°F) and an average of 13°C (55°F), while July boasts warmer conditions, with temperatures ranging from a minimum of 10°C (51°F) to an average of 17°C (63°F). The maximum temperature in September reaches 22°C (71°F), compared to July's higher peak of 26°C (79°F). Additionally, September sees more precipitation, totaling 81 mm (3.2 in) over 13 days, compared to July's 77 mm (3.0 in) over 10 days. Humidity levels are also higher in September at 86%, compared to 78% in July. For more insights on July weather, you can refer to Rauma weather in July.
In comparing the weather of September and August, September tends to be cooler overall, with average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 22°C (71°F), compared to August's milder range of 10°C (49°F) to 25°C (77°F). While both months experience similar levels of precipitation, with September at 81 mm (3.2 in) over 13 days and August slightly higher at 83 mm (3.3 in) over 14 days, September is notably more humid at 86% compared to August's 79%. This increased humidity in September, combined with cooler temperatures, contributes to a distinctly more brisk and overcast atmosphere. For a more detailed look at August weather, you can visit Rauma weather in August.
In September, the weather is generally milder, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 22°C (71°F) and an average of 13°C (55°F). The month sees substantial precipitation of 81 mm (3.2 in) over about 13 days, contributing to an average humidity level of 86%. In contrast, October brings a notable drop in temperatures, with minimums dropping to -1°C (31°F) and a maximum of 15°C (60°F), averaging around 8°C (47°F). Precipitation increases to 101 mm (4.0 in) across 17 days, along with a slight rise in humidity to 90%. For more detailed information on October weather, visit Rauma weather in October.
September and November present a striking contrast in weather patterns. In September, the temperatures range from a minimum of 5°C (41°F) to a pleasant average of 13°C (55°F) and can reach a comfortable maximum of 22°C (71°F). The month experiences relatively high humidity at 86% and receives about 81 mm (3.2 in) of precipitation over 13 days. In contrast, November is significantly cooler, with temperatures dipping to a minimum of -6°C (22°F) and an average of just 5°C (41°F), peaking at 12°C (54°F). While November has slightly less precipitation at 73 mm (2.9 in) over 14 days, the humidity rises to 91%, creating a noticeably chillier atmosphere. For more detailed information, you can explore Rauma weather in November.
September and December in Rauma exhibit striking contrasts in weather patterns. September experiences milder temperatures, with averages around 13°C (55°F) and highs reaching up to 22°C (71°F), while rainfall occurs over 13 days, totaling 81 mm (3.2 in). In contrast, December brings frigid temperatures, with averages plummeting to 1°C (34°F) and maximums only reaching 6°C (44°F). Precipitation in December is slightly lower at 76 mm (3.0 in), but it occurs more frequently, spanning over 16 days, with humidity levels slightly higher at 89%. For more details, visit Rauma weather in December.
As September rolls in, Rauma experiences a notable shift in weather, with cooler temperatures and increasing rainfall setting the tone for the autumn. Unlike the warmer summer months, this transition brings a refreshing average of 13°C (55°F), paired with higher humidity levels that often reach 86%. Rainfall becomes more frequent, with about 13 days of precipitation throughout the month, making the landscape lush but also requiring a robust umbrella. This blend of moderate warmth and persistent showers creates a unique atmosphere, perfect for cozying up with a book or exploring the town’s rich history and culture. To dive deeper into what you can expect throughout the year, visit Rauma Climate.