Last updated: August 21, 2025
September in Rovaniemi, Finland, showcases a captivating transition from summer warmth to the crispness of autumn. With maximum temperatures reaching 21°C (70°F), the days remain pleasantly mild, while the average cools to around 8°C (47°F). Nights can bring a chill, with temperatures sometimes dipping to a brisk -6°C (21°F). This month also witnesses 67 mm (2.6 in) of precipitation, spread over approximately 12 days, contributing to the lush, vibrant scenery. The high humidity level of 92% enhances the mystical ambiance as the landscape begins to change, making September a unique time to experience the charm of this Arctic destination.
In September, Rovaniemi, Finland, marks a distinct transition as the summer warmth gives way to the crispness of autumn. With temperatures ranging from a minimum of -6°C (21°F) to a comfortable 21°C (70°F), the average sits around 8°C (47°F), inviting both locals and visitors to enjoy the changing scenery. As the month progresses, the warmth of late summer begins to retreat, making way for cooler mornings and evenings. This cooling trend foreshadows the harsher winter months ahead, yet September still offers a window for outdoor adventures amidst vibrant foliage, perfect for those looking to experience the enchanting landscape before winter takes hold.
In September, Rovaniemi experiences a notable transition in its precipitation patterns, receiving 67 mm (2.6 in) of rain over approximately 12 days. This increase from the summer months signals the onset of autumn, just after August's peak of 89 mm (3.5 in) and its highest number of rainy days at 16. As the days shorten and temperatures begin to cool, September's rainfall plays a crucial role in nourishing the landscape, preparing it for the snowy blanket that follows in winter. This month’s precipitation is a reminder of the dynamic weather patterns in northern Finland, marking a shift toward the wetter and chillier months ahead.
As September rolls in Rovaniemi, Finland, the humidity begins to settle at 92%, reflecting a transitional period from the warmer summer months. This increase from August’s 87% signifies the onset of cooler temperatures and the approach of autumn. The trend over the year reveals a gradual rise in humidity during the colder months, peaking at 101% in January and December. Meanwhile, the summer months, characterized by slightly lower humidity levels, range from 80% to 87%. Such fluctuations create a unique microclimate, offering visitors a fresh and crisp experience while basking in the enchanting northern landscape.
In September, Rovaniemi experiences a moderate UV Index of 3, marking a transition as summer fades into autumn. With a burn time of 30 minutes, this month still calls for sun protection during outdoor activities, especially as the days gradually shorten. This is a noticeable drop from the high indices observed in June and July, where the UV Index reached 6. As the seasons shift, Rovaniemi's UV levels become less intense, moving back to a predominantly low exposure category in the following months. Visitors and residents alike should remain mindful of UV exposure while enjoying the crisp early autumn air. For more detailed information, check out Rovaniemi UV Index.
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As the days turn crisp and the colors of autumn begin to paint the landscape, September in Rovaniemi boasts a delightful 252 hours of sunshine. This marks a gentle decline from the sun-drenched months of June and July, where daylight reached its zenith with a remarkable 498 hours. The gradual shift from summer to fall showcases a striking transition in daylight, as August provides a radiant encore with 382 hours. Although the light diminishes, September remains a vibrant month, providing ample opportunity to embrace the stunning scenery before the twilight hours of October bring a mere 120 hours of sunshine. The trend reflects the enchanting change of seasons in this Arctic wonderland, inviting visitors to revel in the beauty of early autumn's warm glow.
In September in Rovaniemi, Finland, the likelihood of sunny weather hovers around 25%, showing a slight increase compared to the summer months, but still lower than the peak sunshine experienced in July and June. This transitional period sees a gradual shift as the days grow shorter and the vibrant hues of autumn set in. Although the probability of catching a sunny day diminishes as winter approaches—falling significantly by October—September remains a time of lingering warmth and occasional clear skies, offering a charming backdrop for outdoor exploration amid the changing foliage.
As September unfolds in Rovaniemi, Finland, the days gradually shorten, offering just 13 hours of daylight. This transition marks a gentle shift from the vibrant long days of summer, characterized by 23 hours in June, to the crisp, shorter daylight of autumn and winter. Following the exuberance of August's 16 hours, September ushers in a more subdued atmosphere, as daylight begins to recede further towards October's 9 hours. This trend reflects the changing seasons: the lush brightness of summer gives way to the warm tones of early autumn, inviting locals and visitors alike to savor the lingering daylight before the extended darkness of winter descends.
As September arrives in Rovaniemi, the gentle whispers of the wind carry a distinct chill, marking a transition toward the crispness of autumn. With an average wind speed of 2.9 m/s (7 mph), September shows a slight decline from the summer months, where consistent breezes of 3.0 m/s were felt from June through August. This decrease is subtle yet significant, hinting at the seasonal shift as the landscape prepares for fall. Interestingly, the winds pick up again in October, reaching 3.6 m/s (8 mph), suggesting that nature's rhythm is in full swing, ushering in the vivid hues of autumn leaves and the anticipation of winter's embrace. Each month tells a story of change, with September acting as a bridge, as the winds herald the upcoming transformation of this enchanting northern realm.
Weather in Rovaniemi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rovaniemi, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures in Rovaniemi range from a chilly -6°C (21°F) at night to a warm 21°C (70°F) during the day, with an average of 8°C (47°F). The month sees 67 mm (2.6 in) of precipitation over 12 days, accompanied by high humidity levels of 92%. In contrast, January experiences much harsher weather, with temperatures plummeting to a minimum of -34°C (-28°F) and averaging -10°C (14°F) during the peak of winter, while the maximum hovers just around 4°C (39°F). Precipitation is less frequent at 44 mm (1.7 in) over 10 days, but humidity is astonishingly high at 101%. For more detailed information, check out Rovaniemi weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a chilly -6°C (21°F) at night to a mild 21°C (70°F) during the day, offering an average of 8°C (47°F) overall. The month experiences 67 mm (2.6 in) of precipitation over 12 days, along with a high humidity level of 92%. In contrast, February is much colder, with temperatures plummeting to a minimum of -30°C (-22°F) and only reaching a maximum of 6°C (43°F), averaging -10°C (14°F). February sees less precipitation at 39 mm (1.5 in) over 8 days and an even higher humidity level of 99%. For more details on February weather, you can visit Rovaniemi weather in February.
In comparing the weather of September and March, it is evident that September offers a milder climate, with average temperatures around 8°C (47°F) and maximums reaching 21°C (70°F). In contrast, March experiences much colder conditions, with average temperatures plummeting to -5°C (23°F) and maximums averaging just 8°C (48°F). Precipitation is slightly higher in September at 67 mm (2.6 in) compared to March's 44 mm (1.7 in), although both months have a similar number of rainy days—12 in September and 11 in March. Humidity levels are quite comparable as well, with September at 92% and March slightly higher at 93%. For a detailed view of March weather, you can check Rovaniemi weather in March.
When comparing the weather in September and April, we find distinct differences in temperature and precipitation patterns. September boasts a more moderate temperature range, with a minimum of -6°C (21°F), an average of 8°C (47°F), and a maximum of 21°C (70°F). This month also experiences higher humidity at 92% and more precipitation, totaling 67 mm (2.6 in) across 12 days. In contrast, April typically presents colder conditions, with a minimum of -16°C (4°F) and an average of 0°C (33°F). While it does have a maximum temperature of 18°C (64°F), it sees less precipitation at 37 mm (1.4 in) over just 7 days, alongside a slightly lower humidity level of 88%. For a closer look at April weather, you can refer to Rovaniemi weather in April.
In comparing the weather of September and May, we can observe some notable differences. September tends to be milder with average temperatures around 8°C (47°F), peaking at a comfortable 21°C (70°F), while May has cooler average temperatures at 6°C (43°F) with a maximum reaching 25°C (77°F). Precipitation is slightly higher in September at 67 mm (2.6 in) over 12 days, compared to May's 49 mm (1.9 in) across 10 days. Additionally, September experiences a higher humidity at 92%, whereas May's humidity is somewhat lower at 83%. For those looking to explore more about May weather specifics, check out Rovaniemi weather in May.
In September, the weather in Rovaniemi features a broader temperature range, with minimums dropping to -6°C (21°F) and average highs of 21°C (70°F). The month experiences an average of 67 mm (2.6 in) of precipitation over about 12 days, contributing to a high humidity level of 92%. In contrast, June offers milder temperatures, where the minimum is 0°C (32°F) and average highs reach up to 29°C (84°F). Although June sees slightly higher precipitation of 71 mm (2.8 in) over 13 days, the humidity is lower at 80%. This comparison highlights the notable shift from the cooler, more humid conditions of September to the warm and relatively drier climate of June. For more details on June weather, visit Rovaniemi weather in June.
When comparing the weather in September and July, distinct differences emerge. September experiences cooler temperatures, with a minimum of -6°C (21°F) and an average of 8°C (47°F), while July boasts milder temperatures, ranging from a low of 4°C (39°F) to an average of 16°C (61°F), peaking at a maximum of 31°C (88°F). Additionally, both months see a fair amount of precipitation, with September receiving 67 mm (2.6 in) over 12 days, compared to July's 75 mm (2.9 in) over 11 days. Notably, September also has higher humidity at 92%, compared to July's 83%. For further details on the weather in July, you can visit Rovaniemi weather in July.
In August, temperatures in Rovaniemi typically range from a minimum of 1°C (34°F) to a maximum of 31°C (87°F), with an average of 13°C (56°F). The month is characterized by higher humidity at 87% and slightly more precipitation, totaling 89 mm (3.5 in) over approximately 16 days. In contrast, September experiences cooler temperatures, with a minimum of -6°C (21°F) and a maximum of 21°C (70°F), averaging around 8°C (47°F). Precipitation decreases slightly to 67 mm (2.6 in), yet it still occurs over about 12 days, alongside a higher humidity level of 92%. For more details, check out Rovaniemi weather in August.
As the seasons transition from September to October, the weather in Rovaniemi undergoes a notable shift. September showcases a milder range of temperatures, with averages around 8°C (47°F) and a maximum of 21°C (70°F), while October brings much colder conditions, featuring an average of just 2°C (36°F) and a maximum of 13°C (56°F). Additionally, October experiences an increase in precipitation, with 81 mm (3.2 in) over 15 days, compared to September's 67 mm (2.6 in) across 12 days. The humidity also climbs slightly in October, reaching 97% compared to September’s 92%. For more detailed information, visit Rovaniemi weather in October.
In September, the weather is milder with temperatures ranging from a minimum of -6°C (21°F) to a maximum of 21°C (70°F) and an average of 8°C (47°F). The month experiences approximately 67 mm (2.6 in) of precipitation over 12 days, accompanied by high humidity levels at 92%. In contrast, November brings significantly colder conditions, with temperatures dropping to a minimum of -19°C (-1°F) and an average of -3°C (27°F), peaking at just 8°C (46°F). Although the precipitation is slightly less at 61 mm (2.4 in) over the same number of days, humidity increases to 98%. For more detailed information about November weather, you can check Rovaniemi weather in November.
September and December boast starkly contrasting weather conditions. In September, temperatures range from a chilly minimum of -6°C (21°F) to a comfortable maximum of 21°C (70°F), with an average of 8°C (47°F). Precipitation is relatively moderate, totaling 67 mm (2.6 in) over about 12 days, accompanied by high humidity at 92%. In contrast, December sees much colder conditions, with a stark minimum of -28°C (-19°F) and an average temperature of -7°C (20°F), only rising to a maximum of 3°C (38°F). Despite lower precipitation at 59 mm (2.3 in) over 16 days, the humidity is exceptionally high at 101%. For more detailed insights into December's chilly conditions, check out Rovaniemi weather in December.
As September unfolds in Rovaniemi, the weather presents a striking contrast to the summer months, transitioning into a more brisk and unpredictable ambiance. With temperatures dipping, there's a notable drop from the warmth of August, making it a month of layered clothing and cozy gatherings. The increased precipitation and higher humidity levels contribute to the enchanting, albeit sometimes damp, atmosphere, often draped in the gentle embrace of early autumn. This change serves as a beautiful prelude to the winter chill that follows. For more insights into the shifting seasons and their impacts, explore our detailed page on Rovaniemi Climate.