Last updated: August 21, 2025
September in Suomussalmi, Finland presents a striking transition as summer gracefully yields to autumn. With maximum temperatures reaching 23°C (73°F) and an average temperature of 8°C (47°F), the month showcases a diverse climate palette. However, chilly nights can plunge to a brisk -4°C (25°F), reminding residents and visitors alike of the approaching colder seasons. Rainfall is a notable feature, with 83 mm (3.3 in) spread over 13 days, contributing to the lush landscape and vibrant fall foliage. Additionally, humidity reaches a considerable 91%, creating a moist atmosphere that enhances the natural beauty of this tranquil Finnish town.
As September unfolds in Suomussalmi, Finland, the temperatures begin to shift noticeably, marking the transition into autumn. With minimums dipping to -4°C (25°F) and averages hovering around 8°C (47°F), there's a coolness in the air that contrasts sharply with the warm summer months that have just passed. The maximum temperatures can reach a pleasant 23°C (73°F), offering a comfortable warmth during the day, perfect for enjoying the natural beauty of the region. This month captures the essence of change, blending the remnants of summer's warmth with the crisp anticipation of winter, creating a compelling backdrop for outdoor adventures against vibrant autumn foliage.
September brings a notable shift in Suomussalmi, Finland, with a precipitation total of 83 mm (3.3 in), making it one of the wetter months of the year. This increase follows the peak rainfall of 108 mm (4.2 in) recorded in August, indicating a gradual transition towards autumn. Interestingly, September experiences 13 days of precipitation, which is consistent with the wetter summer months, yet lower than the 17 days seen in August. As the days grow shorter and temperatures begin to cool, the region prepares for October, which typically sees even higher precipitation at 90 mm (3.5 in). Overall, September's rainfall lays the groundwork for the lush landscapes of Suomussalmi, framed by the colors of the season.
As September arrives in Suomussalmi, Finland, residents experience a noticeable shift in humidity, with levels reaching 91%. This is a slight increase from the summer months, where July and August had humidity levels of 83% and 87%, respectively. Steadily dropping from the frosty heights of 101% in January, humidity generally decreases throughout the late spring and summer before starting to climb again in early autumn. With October and November maintaining high humidity levels at 96%, it becomes evident that as the days grow shorter and cooler, the air begins to swell with moisture once more, creating a transitional atmosphere that heralds the onset of winter.
September in Suomussalmi, Finland, sees a UV Index of 3, indicating a moderate exposure category with a burn time of 30 minutes. As summer transitions into autumn, the UV levels reflect a notable decline from the peak summer months of June and July, when the index reached 6. This decrease is accompanied by a gradual shift toward lower UV indices typical of the fall months, such as October and November, which both exhibit indices of 2 and 1, respectively. The trend illustrates a clear easing of sun exposure as the year progresses, reminding residents and visitors to balance sun enjoyment with smart protection. For more detailed information, check the Suomussalmi UV Index.
UV Risk Categories
As summer wanes, September in Suomussalmi, Finland embraces a golden transition with 227 hours of sunshine, marking a gentle decrease from the sun-soaked months of July and June, which basked in nearly 480 hours of glorious daylight. This month represents a delicate balance, as nature begins its shift towards autumn, allowing for more muted yet serene light. Despite the shorter days ahead, September still gifts residents and visitors with ample opportunities to enjoy the lingering warmth of late summer, providing a beautiful backdrop for outdoor adventures amidst the changing foliage. The steady decline in sunshine hours from the peak of summer evokes a sense of calm reflection, as the vibrant colors of autumn begin to paint the landscape, making it a truly enchanting time to explore the natural beauty of Suomussalmi.
In Suomussalmi, Finland, the likelihood of experiencing sunny weather fluctuates significantly throughout the year. As summer peaks in July, the chance of sunshine reaches its highest point at 49%, creating the perfect backdrop for outdoor activities. However, as the seasons transition into autumn, the percentage of sunny days drops sharply. By September, the chance of sun settles at 23%, a figure that mirrors the preceding month's summer decline. This trend highlights a notable retreat from the sun-drenched days of summer, making September a month where occasional bursts of sunlight are interspersed with the encroaching chill of autumn. As the year progresses further into autumn and winter, the likelihood of sunny weather diminishes even more, with figures plummeting to 5% by October.
As September unfolds in Suomussalmi, Finland, daylight begins its gradual retreat following the summer's long, sun-drenched days. Throughout the month, residents can expect around 12 hours of daylight, a noticeable reduction from the vibrant 16 hours enjoyed in August. This shift marks the transition from the extensive daylight of midsummer, where June peaks at an impressive 21 hours, to the shorter days of autumn, a rhythm that mirrors nature's own cycles. The approaching autumn days remind us of the fleeting warmth and light, as the sunlight wanes further into October with just 9 hours shining through. Embracing these changes can lead to a deeper appreciation for the unique beauty of each season in this tranquil corner of Finland.
As September settles in Suomussalmi, the average wind speed rests at a gentle 3.0 m/s (7 mph), reflecting a trend of consistent breezes that have characterized the summer months. After a warmer season dominated by mild winds, the return of autumn brings a slight increase in gustiness compared to the calmness of July and June, both at 2.9 m/s (7 mph). This shift signals a transition as nature prepares for the chill of winter, with October’s winds picking up to 3.7 m/s (8 mph), reminiscent of early spring’s breezier days. The winds of September provide a refreshing reminder of the changing seasons, gently rustling through the vibrant foliage and setting the stage for the beautiful transformations ahead.
Weather in Suomussalmi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Suomussalmi, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather, each marking distinct seasons. In September, temperatures range from a chilly -4°C (25°F) at night to a pleasant maximum of 23°C (73°F) during the day, with an average of 8°C (47°F). This month sees 83 mm (3.3 in) of precipitation spread over 13 days and is characterized by high humidity at 91%. In contrast, January plunges into much harsher conditions, where temperatures can drop to a grim -33°C (-27°F), averaging -9°C (16°F) and reaching a maximum of only 4°C (40°F). With only 45 mm (1.8 in) of precipitation occurring over 12 days and humidity soaring to 101%, January encapsulates the deep chill of winter. For more insights into January's weather specifics, check out Suomussalmi weather in January.
September and February present starkly contrasting weather patterns. In September, temperatures range from a mild minimum of -4°C (25°F) to a pleasant maximum of 23°C (73°F), with an average of 8°C (47°F). The month experiences around 83 mm (3.3 inches) of precipitation over 13 days and maintains a relatively high humidity level of 91%. In comparison, February is much colder, with temperatures dipping to a minimum of -28°C (-19°F) and only reaching a maximum of 4°C (40°F), resulting in an average of -10°C (15°F). Precipitation in February is lower at 39 mm (1.5 inches) spread over 9 days, but humidity is notably high at 99%. For more detailed information, check out Suomussalmi weather in February.
In comparing the weather of September and March, a stark contrast emerges. September sees milder temperatures, with average highs of 23°C (73°F) and lows of -4°C (25°F), while March is significantly colder, featuring averages around -5°C (23°F) and plunging to a chilling -28°C (-19°F). In terms of precipitation, September experiences more rain at 83 mm (3.3 in) over 13 days, compared to March's 46 mm (1.8 in) across 12 days. Additionally, humidity levels are slightly higher in March at 94%, as opposed to September's 91%. For a more detailed overview of the conditions during this time, you can check Suomussalmi weather in March.
When comparing the weather of September and April, it’s clear that September tends to be milder and wetter. With average temperatures in September ranging from a minimum of -4°C (25°F) to a maximum of 23°C (73°F), it offers a more comfortable experience than April, which sees colder conditions with temperatures fluctuating between -15°C (5°F) and a maximum of 20°C (68°F). Additionally, September experiences more precipitation, totaling 83 mm (3.3 in) over 13 days, compared to April's 43 mm (1.7 in) over just 10 days. Humidity levels are also slightly higher in September at 91%, while April maintains a relative humidity of 88%. For a closer look at the climate specifics, check out Suomussalmi weather in April.
When comparing the weather in September and May, it's clear that September generally offers milder temperatures, with a minimum of -4°C (25°F), an average of 8°C (47°F), and a maximum of 23°C (73°F). In contrast, May tends to be a bit cooler, starting with a minimum temperature of -9°C (17°F) and an average of 6°C (44°F), although it can reach up to 28°C (82°F) at its warmest. Precipitation levels are also different; September sees about 83 mm (3.3 in) of rainfall over 13 days, while May experiences less with around 58 mm (2.3 in) over 11 days. Additionally, humidity in September is slightly higher at 91% compared to May's 83%. For a deeper dive into May's weather, you can check Suomussalmi weather in May.
In September, the weather in Suomussalmi experiences cooler temperatures, with a minimum of -4°C (25°F) and an average of 8°C (47°F), peaking at 23°C (73°F). This month also sees higher humidity at 91% and a notable 83 mm (3.3 in) of precipitation spread over 13 days. In contrast, June showcases milder conditions with a minimum of 0°C (31°F), an average of 13°C (57°F), and a maximum temperature of 30°C (86°F). Although June has slightly less rainfall at 74 mm (2.9 in) over the same number of days, it boasts lower humidity levels at 79%. For a closer look at the June weather patterns, visit Suomussalmi weather in June.
When comparing the weather in September and July, it's clear that July tends to be much warmer. With average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 30°C (86°F), July offers a pleasant warmth that is significantly higher than September's average temperatures, which range from -4°C (25°F) at night to a maximum of 23°C (73°F) during the day. Additionally, July experiences slightly less precipitation, totaling 78 mm (3.1 in) over 11 days, compared to September's 83 mm (3.3 in) over 13 days. Humidity levels are also higher in September at 91%, compared to 83% in July. For more detailed information on July weather in Suomussalmi, you can check this link: Suomussalmi weather in July.
The weather in September presents a notable shift compared to August, with September experiencing cooler temperatures overall. The minimum temperature in September dips to -4°C (25°F), while August sees a milder minimum of 1°C (35°F). Average temperatures also reflect this change, falling from 13°C (56°F) in August to 8°C (47°F) in September. The maximum temperature in September reaches only 23°C (73°F), compared to a high of 30°C (86°F) in August.
Precipitation is slightly lower in September, with 83 mm (3.3 in) over 13 days, compared to 108 mm (4.2 in) spread across 17 days in August. Humidity levels are slightly higher in September at 91%, compared to 87% in August, adding to the perception of a cooler and more damp environment as summer gives way to the fall season. For a more detailed look at the weather specifics during August, you can check Suomussalmi weather in August.
September and October present a noticeable shift in weather patterns. While September enjoys milder temperatures with a minimum of -4°C (25°F) and an average of 8°C (47°F), October sees a dip in temperatures, with lows reaching -11°C (13°F) and an average of just 3°C (37°F). Both months experience significant precipitation, but October slightly surpasses September with 90 mm (3.5 in) of rain over 16 days compared to September's 83 mm (3.3 in) over 13 days. Additionally, humidity levels rise in October, peaking at 96% compared to September's 91%. For more insights, check out Suomussalmi weather in October.
September and November present contrasting weather conditions despite both being transitional months. In September, temperatures range from a minimum of -4°C (25°F) to a pleasant maximum of 23°C (73°F), averaging around 8°C (47°F). While there is significant rainfall, with 83 mm (3.3 in) over 13 days, the humidity is relatively high at 91%, giving a crisp feel to the autumn air.
In stark contrast, November brings much colder temperatures, with a stark minimum of -20°C (-3°F) and an average of -2°C (29°F), peaking at only 8°C (47°F). Precipitation decreases slightly to 73 mm (2.9 in) over 15 days, while humidity rises to 96%, creating a damp and frosty atmosphere. For more detailed information on November weather in this region, visit Suomussalmi weather in November.
September and December showcase a stark contrast in weather patterns. September typically experiences milder temperatures, ranging from a minimum of -4°C (25°F) to a comfortable maximum of 23°C (73°F), along with an average temperature of 8°C (47°F). The month sees moderate precipitation of 83 mm (3.3 in) over about 13 days and relatively high humidity at 91%. In contrast, December plunges into much colder conditions, where temperatures can drop to -22°C (-7°F) with an average of -6°C (22°F) and a maximum of just 3°C (37°F). This month brings slightly less precipitation at 66 mm (2.6 in) but over a longer span of 18 days, accompanied by a significant increase in humidity, reaching a full 100%. For more detailed information, check out Suomussalmi weather in December.
As summer gracefully gives way to autumn, September in Suomussalmi stands out with its unique blend of crisp air and vibrant foliage. The temperatures begin to cool, showcasing a significant shift from the warm highs of summer, while the frequent rain showers—amounting to 83 mm over 13 days—add a refreshing touch to the landscape. With humidity levels reaching 91%, the atmosphere feels distinctly different, enveloping the area in a soft mist on cooler mornings. This transitional month offers a picturesque setting for nature lovers and adventurers alike, making it an ideal time to explore the diverse beauty of this region. For a deeper insight into what to expect throughout the year, visit Suomussalmi Climate.