Last updated: August 21, 2025
September in Ranua, Finland presents a striking transition from the warmth of summer to the chill of autumn. Average temperatures hover around a crisp 8°C (46°F), with maximums peaking at a pleasant 23°C (73°F) and occasional minimums plummeting to a brisk -7°C (20°F). This month sees a substantial precipitation total of 76 mm (3.0 in) over 13 days, contributing to the lush landscape while the humidity levels remain high at 90%. Visitors can expect a blend of picturesque scenery and fluctuating weather, making it a unique time to experience Ranua's natural beauty.
In September, Ranua, Finland transitions into the crisp embrace of autumn, showcasing a remarkable drop in temperatures from the summer's warmth. Minimum temperatures hover around a brisk -7°C (20°F), while the average settles at a moderate 8°C (46°F). As the month progresses, daytime highs can reach a pleasant 23°C (73°F), offering a comfortable climate for outdoor adventures amidst the stunning fall foliage. This shift marks a significant shift from the balmy highs of summer, making September a unique blend of lingering warmth and the early chill of the coming winter months. The cooler evenings beckon cozy gatherings as nature prepares for its seasonal slumber, highlighting a beautiful transition in this northern landscape.
September in Ranua, Finland, witnesses a significant transition as summer gives way to autumn, with precipitation measuring 76 mm (3.0 in) over approximately 13 rainy days. This figure underscores the steady trend of increasing rainfall leading up to this month, peaking in August before slightly tapering off. The consistent precipitation seen throughout the summer months, particularly in June and July with 77 mm (3.0 in) and 76 mm (3.0 in), sets the stage for September's dampness. As the year progresses, the rainfall amount hovers around the mid-range values typical for early autumn, reflecting the region's shift towards cooler, wetter conditions that characterize the later months. This gradual increase in precipitation is a harbinger of the colder and wetter weather ahead, signaling nature's transition in Ranua.
In September, humidity in Ranua, Finland hovers around 90%, marking a noticeable shift from the summer months. As the air cools, this spike reflects the gradual transition from the relatively lower humidity of July and August, which were around 79% and 84%, respectively. Following the warm season, September's higher moisture content paves the way for the crispness of autumn, setting the stage for the chill that descends in the coming months. As the year progresses, humidity levels once again rise, peaking at 100% in January, illustrating a consistent annual cycle where the darkest winter months contrast with the mild, yet humid, relief of late summer.
In September, Ranua, Finland, experiences a moderate UV Index of 3, signaling a transition from the summer months into the cooler autumn. With a burn time of about 30 minutes, residents and visitors should remain mindful of sun exposure, particularly during midday hours. This index reflects a gentle decrease compared to the peak summer months of June and July, when UV levels reached 6, urging caution outdoors. As the days shorten, the UV Index tends to drop, but staying vigilant about sun safety remains important. For more detailed information, check out the Ranua UV Index.
UV Risk Categories
As summer fades in Ranua, Finland, September brings with it a delightful transition marked by 242 hours of sunshine. Following the lively glow of July and August, which basked in nearly 500 hours of daylight, the month serves as a gentle reminder of the approaching autumn. While September enjoys a substantial amount of sunshine compared to the winter months—such as the mere 14 hours seen in December—it also showcases the gradual decline that follows summer's peak. This shift highlights a seasonal rhythm: after reaching a zenith in June and July, the daylight hours begin to recede, preparing the landscape for the tranquil beauty of fall. As nature dons its autumnal garb, the soft sunlight of September casts a warm glow, inviting both reflection and appreciation for the last remnants of summer.
In Ranua, Finland, September brings a 24% chance of sunny weather, which aligns with a notable decline in sunshine after the warmer summer months. Following the peak of 47% in July, the probability of clear skies gradually decreases, reflecting the shift towards the chillier autumn season. This trend is consistent as the sunny days dwindle into October, with only a 5% chance of sun. As summer fades, September offers a pleasant yet unpredictable mix of weather, hinting at the vibrant fall colors while still holding on to a few sunny moments.
As autumn begins to settle in Ranua, Finland, September showcases a transition in daylight duration, offering approximately 13 hours of light each day. This marks a gradual decline from the vibrant brightness of summer months, which peaked in June with nearly 23 hours of daylight. Following the warmth of summer, September still basks in the lingering glow, allowing for ample outdoor activities and scenic views of the changing foliage. However, this month also signals the onset of shorter days, leading into October, where daylight shrinks to just 9 hours. This rhythmic ebb and flow of light throughout the year exemplifies the unique beauty of life in the Arctic Circle, inviting both locals and visitors to savor the fleeting warmth as they prepare for the approaching winter months.
As autumn arrives in Ranua, Finland, September greets us with a gentle breeze, marked by an average wind speed of 2.9 m/s (7 mph). This month mirrors the wind patterns of the summer, maintaining a steady, soft flow reminiscent of the previous months. Notably, September's winds remain consistent with those of July and August, suggesting a smooth transition into the cooler fall season. As the year progresses, we see a slight uptick in wind speed in October, which could herald the brisker days ahead. Overall, September serves as a calm bridge between the warmth of summer and the invigorating chill of autumn, inviting locals and visitors alike to enjoy the crisp air and the beauty of changing foliage.
Weather in Ranua varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ranua, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly contrasting weather conditions. In September, temperatures range from a chilly -7°C (20°F) at night to a pleasant 23°C (73°F) during the day, with an average of 8°C (46°F). The month experiences 76 mm (3.0 in) of precipitation over 13 days, accompanied by high humidity at 90%. In stark contrast, January sees much harsher conditions, with temperatures dipping as low as -31°C (-24°F) and averaging -10°C (15°F). Daytime highs struggle to reach above 4°C (39°F), and while there is less precipitation at 46 mm (1.8 in) over 11 days, humidity is notably at 100%. These differences highlight how the transition from early autumn to mid-winter brings significant shifts in both temperature and moisture levels, making each month unique in its own right. For more details on the chilly conditions in January, check out Ranua weather in January.
September and February present starkly contrasting weather conditions. In September, temperatures range from a minimum of -7°C (20°F) to a pleasant maximum of 23°C (73°F), with an average of 8°C (46°F). This month sees a fair amount of rainfall, accumulating to 76 mm (3.0 in) over 13 days, coupled with high humidity levels at around 90%. In contrast, February offers a much colder experience, with temperatures plunging to a minimum of -29°C (-20°F) and capping at a maximum of only 5°C (42°F), averaging at -10°C (14°F). Precipitation is lower than in September, totaling 42 mm (1.6 in) over just 9 days, while humidity remains notably high at 98%. For more details on February weather, you can check out this link: Ranua weather in February.
In September, temperatures range from a chilly minimum of -7°C (20°F) to a pleasant maximum of 23°C (73°F), with an average of 8°C (46°F). The month sees about 76 mm (3.0 in) of precipitation over 13 days, accompanied by a humidity level of 90%. In contrast, March presents a much colder climate, with temperatures dipping significantly lower, from a maximum of just 7°C (46°F) to a minimum of -24°C (-11°F) and an average of -5°C (23°F). Precipitation in March totals around 47 mm (1.9 in) across 11 days, and the humidity is slightly higher at 95%. For a detailed look at March weather, you can visit Ranua weather in March.
In September, temperatures range from a minimum of -7°C (20°F) to a maximum of 23°C (73°F), with an average of 8°C (46°F). The month experiences about 76 mm (3.0 in) of precipitation over 13 days, resulting in a humid atmosphere with around 90% humidity. In contrast, April features cooler temperatures, with lows of -15°C (5°F) and highs reaching 17°C (63°F), averaging around 0°C (33°F). Precipitation in April is lighter at 43 mm (1.7 in) across just 8 days, and humidity remains relatively high at 87%. For more details, check out Ranua weather in April.
In comparing the weather between September and May, we can see notable differences in temperatures and precipitation. September experiences milder conditions with average temperatures ranging from a minimum of -7°C (20°F) to a maximum of 23°C (73°F), while May sees slightly cooler temperatures, with lows at -8°C (17°F) and highs reaching 26°C (80°F). Additionally, September has higher humidity levels at 90% compared to May's 81%, creating a more damp atmosphere as the summer wanes. Rainfall is also greater in September, accumulating 76 mm over 13 days, in contrast to May's 53 mm over 10 days. For a more detailed look at the weather conditions in May, check out Ranua weather in May.
In comparing the weather of September and June, it’s evident that June is generally milder and warmer. In June, temperatures range from a minimum of -1°C (31°F) to a maximum of 29°C (85°F), with an average temperature of 13°C (56°F). By contrast, September has significantly cooler temperatures, with a minimum of -7°C (20°F), an average of 8°C (46°F), and a maximum of 23°C (73°F). Both months receive similar amounts of precipitation at 77 mm (3.0 in), but with 13 days of rain in each month, June experiences a lower humidity level of 77%, compared to September’s humid conditions at 90%. For a closer look at the June weather specifics, check out this link: Ranua weather in June.
When comparing the weather between July and September, several notable differences emerge. July tends to be warmer, with average temperatures reaching 16°C (61°F) and maximums soaring up to 30°C (87°F), while September's average temperature is significantly cooler at 8°C (46°F), peaking at 23°C (73°F). Precipitation levels are similar in both months, with July experiencing rain on 10 days and September on 13 days, amounting to 76 mm (3.0 in) in each. Humidity also differs, with July having a relatively lower humidity of 79% compared to September's more oppressive 90%. For a closer look at July's weather specifics, you can check out Ranua weather in July.
In comparing the weather of September and August, September tends to be cooler and more variable, with average temperatures around 8°C (46°F) compared to August's warmer 13°C (56°F). While August enjoys higher maximum temperatures peaking at 30°C (86°F), September sees a max of only 23°C (73°F). Both months experience significant precipitation, but September receives slightly less at 76 mm (3.0 in) over 13 days, compared to 88 mm (3.5 in) over 16 days in August. Additionally, September's humidity is higher at 90%, in contrast to August's 84%. For more detailed insights on August, you can visit Ranua weather in August.
September and October present a notable transition in weather conditions. In September, temperatures range from a minimum of -7°C (20°F) to a pleasant maximum of 23°C (73°F), with an average temperature of 8°C (46°F). The month experiences slightly less precipitation, totaling 76 mm (3.0 in) over 13 days, and has a humidity level of 90%. In contrast, October sees a further drop in temperatures, with a minimum of -18°C (0°F) and a maximum of only 14°C (58°F), leading to an average of just 2°C (36°F). The month is slightly wetter, with precipitation reaching 79 mm (3.1 in) over 14 days and an increase in humidity to 95%. This shift highlights the approach of winter, making October significantly chillier than its predecessor. For more detailed insights into October weather, you can check Ranua weather in October.
September and November exhibit distinct weather patterns, highlighting the transition from early autumn to late fall. In September, temperatures range from a chilly minimum of -7°C (20°F) to a comfortable maximum of 23°C (73°F), with an average of 8°C (46°F). The month experiences about 76 mm (3.0 in) of precipitation over 13 days and maintains a high humidity level of 90%. Conversely, November brings colder conditions, with temperatures dipping to a minimum of -19°C (-2°F) and an average of -3°C (27°F), reaching a maximum of only 8°C (46°F). Precipitation slightly decreases to 70 mm (2.8 in) but is spread across 15 days, and humidity rises to 95%. This stark shift in temperatures and humidity underscores the arrival of winter. For more detailed insights, you can check Ranua weather in November.
In September, temperatures range from a chilly -7°C (20°F) at night to a comfortable 23°C (73°F) during the day, with an average of 8°C (46°F). The month experiences about 76 mm (3.0 in) of precipitation over 13 days, and humidity levels sit at a relatively high 90%. In contrast, December brings far colder weather, with temperatures plummeting to a minimum of -27°C (-17°F) and averaging -6°C (21°F), peaking at just 3°C (38°F). Precipitation decreases slightly to 62 mm (2.4 in) across 16 days, but humidity rises to a remarkable 99%. For more details on December weather, visit Ranua weather in December.
As September unfolds in Ranua, the transition from summer to autumn is palpable, with temperatures ranging significantly and a noticeable increase in humidity. This month experiences a remarkable shift, moving away from the warmth of summer, where highs can soar, to cooler averages and even frosty nights. The average rainfall of 76 mm over 13 days emphasizes the onset of the wetter season, contrasting sharply with the drier months preceding it. With humidity levels reaching 90%, the air carries a crispness that heralds the changing leaves and the approach of winter. For more insights into the diversity of Ranua's seasonal weather, visit Ranua Climate.