Last updated: August 21, 2025
September in Joensuu, Finland marks the transition to autumn, characterized by a maximum temperature of 22°C (72°F) and an average of 10°C (51°F). As temperatures dip, the minimum can reach 0°C (32°F), heralding cooler days. Rainfall is a common feature this month, with 87 mm (3.4 in) of precipitation spread over 14 days, contributing to the area's lush landscapes. With a high humidity level of 92%, the air feels particularly invigorating, perfect for outdoor activities while enjoying the stunning fall colors.
As September unfolds in Joensuu, Finland, the transition to autumn becomes palpable. Temperatures begin to dip, with daytime highs reaching a pleasant 22°C (72°F) and nighttime lows dropping to around 0°C (32°F). The average temperature settles at a comfortable 10°C (51°F), marking a significant shift from the warmth of summer. This month offers a balanced climate, allowing for outdoor activities amidst the vibrant fall foliage. As summer's warmth fades, the crispness in the air hints at the colder months ahead, creating a perfect backdrop for cozy sweaters and warm drinks. The gradual cooling in September serves as a gentle reminder that nature is preparing for a seasonal change, inviting residents and visitors alike to embrace the beauty of autumn in Joensuu.
In September, Joensuu experiences a notable shift in weather as summer gives way to fall, bringing substantial precipitation totaling 87 mm (3.4 in) over approximately 14 days. This amount marks a slight decrease from August's peak of 99 mm (3.9 in) but remains consistent with the trend of late summer and early autumn rains. During this transitional period, the frequency of rainy days usually heightens, paving the way for vibrant autumn colors to emerge across the landscape. As Joensuu prepares for the cooler months ahead, the steady rainfall not only enriches the environment but also sets the stage for the crisp air and changing foliage characteristic of Finnish autumn.
In Joensuu, Finland, the arrival of September brings a noticeable shift in humidity levels, averaging around 92%. This slight increase suggests that as summer transitions into autumn, the air retains more moisture, creating a palpable heaviness. While July and August also showcased elevated humidity levels of 83% and 88%, respectively, September sets the stage for the impending chill of fall, where humidity begins to rise again, following a trend that peaks in winter months such as January at a staggering 99%. This gradual fluctuation reflects Joensuu's unique climate, where lush summer greens yield to the colorful hues of autumn, all while the air grows richer with moisture. As the months advance towards winter, residents can expect this cycle of humidity to influence the atmosphere and their daily experiences.
As September arrives in Joensuu, Finland, the UV Index dips to 3, placing it in the moderate exposure category with a burn time of 30 minutes. This marks a gentle decline from the high levels experienced in the summer months of June and July, where the index reached 6. With this transition, residents and visitors are reminded to stay mindful of sun exposure, particularly during the sunny days that can still occur in early autumn. As we move through the months, the UV Index will continue to decrease, ushering in the colder season. For more detailed information on solar radiation levels, check out the Joensuu UV Index.
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September in Joensuu, Finland, is a delightful transition month, boasting 254 hours of sunshine. Following the vibrant summer months of June and July, which offered an impressive 493 and 477 hours respectively, September sees a notable decrease, yet it continues to shine brightly compared to the dimmer days of October and November. The thermal embrace of early autumn keeps the community energized, making it a perfect time for outdoor activities amidst the changing foliage. The contrast between the early warmth of summer and the approach of winter is palpable as we enjoy one last burst of golden sunshine before the long, dark months set in.
As September arrives in Joensuu, Finland, the chance of sunny weather begins to wane, with a 22% likelihood of sunshine. This marks a notable decline from the peak summer months, where July and June enjoy over 50% sunshine, creating a vibrant atmosphere. Following the sunny bursts of summer, September often sees a return to more subdued conditions, aligning with the transition into autumn. While the sun may not shine as frequently now, the beauty of early fall still offers stunning landscapes and cooler, crisp air, making it an enchanting time to experience Joensuu’s changing scenery.
As autumn begins to creep in, September in Joensuu, Finland, marks a notable shift in daylight duration. With 12 hours of daylight, the month serves as a bridge between the long, sun-drenched days of summer, where daylight peaked at 19 hours in June, and the shorter days of impending winter. September's light is a gentle decline from August’s generous 15 hours, heralding a gradual transition as nature prepares for the colder months ahead. This trend of diminishing daylight continues into October, where it drops to 9 hours, underlining the seasonal progression. Thus, September encapsulates a beautiful blend of lingering warmth and the subtle onset of autumn’s embrace.
As the summer wanes and September arrives in Joensuu, Finland, the air becomes crisp with an average wind speed of 3.3 m/s (7 mph), creating a refreshing backdrop for the transition into autumn. This gentle breeze maintains a similar pace to the months before, reflecting a trend of relatively stable wind conditions throughout the summer. While the winds are slightly calmer compared to the earlier gusts of August, they remain consistent and invigorating, setting the stage for the brisker winds of October which peak at 4.3 m/s (10 mph). The subtle shift in wind dynamicsthis month hints at the changing seasons, as nature begins to prepare for the more blustery conditions that lie ahead.
Weather in Joensuu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Joensuu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is mild with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 22°C (72°F), and an average of 10°C (51°F). The month sees about 87 mm (3.4 in) of precipitation over approximately 14 days, accompanied by high humidity at 92%. In contrast, January brings much harsher conditions, where temperatures can plummet to a minimum of -29°C (-19°F), averaging -6°C (21°F) and reaching a maximum of only 5°C (41°F). The precipitation decreases to 48 mm (1.9 in) over 13 days, but the humidity remains quite high at 99%. For a more in-depth look at the January weather, you can refer to Joensuu weather in January.
When comparing the weather in September and February, it's clear that the two months present drastically different climates. September typically enjoys milder temperatures, ranging from a minimum of 0°C (32°F) to a maximum of 22°C (72°F), with an average of 10°C (51°F). However, it experiences relatively high humidity at 92% and about 87 mm (3.4 in) of precipitation over 14 days.
In contrast, February is characterized by frigid temperatures, with lows reaching -27°C (-17°F) and a maximum of only 4°C (40°F), resulting in an average temperature of -7°C (20°F). Although it has less precipitation at 48 mm (1.9 in) over 12 days, February is notably more humid at 98%, making it feel even colder. For more detailed insights, you can visit Joensuu weather in February.
September and March present stark contrasts in weather conditions. September typically enjoys milder temperatures, with a minimum of 0°C (32°F) and a pleasant average of 10°C (51°F), peaking at a maximum of 22°C (72°F). The month sees a total precipitation of 87 mm (3.4 in) over about 14 days, alongside high humidity at 92%. In contrast, March is much colder, starting with a minimum of -25°C (-14°F) and averaging around -3°C (26°F), with a maximum of 9°C (49°F). Precipitation is lower at 50 mm (2.0 in) over 12 days, but the humidity is slightly higher at 95%. This means that while September invites outdoor activities with its mild climate, March brings the biting chill of late winter, offering a different type of experience. For more specific information on March weather, you can visit Joensuu weather in March.
In September, the weather tends to be milder with temperatures ranging from a chilly 0°C (32°F) at night to a comfortable 22°C (72°F) during the day, averaging around 10°C (51°F). This month experiences significant precipitation, with 87 mm (3.4 in) falling over approximately 14 days, accompanied by high humidity levels at 92%. In contrast, April is much colder, with nightly lows reaching -14°C (8°F) and daytime highs averaging 17°C (64°F), though the average temperature rests at just 1°C (35°F). April sees less precipitation, totaling 41 mm (1.6 in) over 9 days, and slightly lower humidity at 87%. For more detailed information on April weather, you can check out Joensuu weather in April.
In comparing the weather of September and May, notable differences emerge in temperature and precipitation patterns. September experiences a mild average temperature of 10°C (51°F), with maximum highs reaching up to 22°C (72°F). In contrast, May, while having a higher maximum temperature of 26°C (79°F), has a lower average of 8°C (47°F) and a minimum of -4°C (25°F). Precipitation is also more prevalent in September, with 87 mm (3.4 in) falling over 14 days, compared to May's 55 mm (2.2 in) across 11 days. Additionally, September boasts higher humidity levels at 92%, while May's humidity is more comfortable at 78%. For more detailed insights on May weather, you can check Joensuu weather in May.
In comparing the weather between September and June, there are notable differences in temperature and humidity. September sees a cooler climate with a minimum temperature of 0°C (32°F) and an average of only 10°C (51°F), while June enjoys milder conditions, with minimum temperatures starting at 2°C (37°F) and an average soaring to 16°C (60°F). Additionally, June can reach maximum temperatures up to 31°C (87°F), making it significantly warmer than the max of 22°C (72°F) experienced in September. Precipitation levels also vary, with September receiving 87 mm (3.4 in) over 14 days, compared to June's 58 mm (2.3 in) over just 11 days. Humidity is higher in September at 92%, contrasting with June's more comfortable 75%. For more information about June weather specifically, you can check Joensuu weather in June.
In comparing the weather of September and July, we see a significant difference in temperatures. September experiences cooler temperatures with a minimum of 0°C (32°F) and an average of 10°C (51°F), while July is much warmer, starting at a minimum of 7°C (45°F) and peaking at an average of 17°C (63°F). Notably, July can reach a maximum temperature of 31°C (88°F), providing a stark contrast to September's maximum of 22°C (72°F). Precipitation levels are quite similar, with September recording 87 mm (3.4 in) over 14 days compared to July's 89 mm (3.5 in) over 12 days. Additionally, September's humidity is higher at 92% compared to July's 83%, contributing to a more damp atmosphere as the summer fades. For a closer look at July's weather specifics, you can visit Joensuu weather in July.
September in Joensuu is noticeably cooler than August, with average temperatures dropping from 15°C (60°F) to 10°C (51°F). While August offers warmer highs of up to 29°C (85°F), September's maximum temperature reaches only 22°C (72°F). Additionally, September experiences slightly less precipitation, totaling 87 mm (3.4 in) over 14 days, compared to August's 99 mm (3.9 in) over 16 days. The humidity remains relatively high in both months, peaking at 92% in September compared to 88% in August. For more detailed weather information, you can check Joensuu weather in August.
In September, the weather is generally milder with an average temperature of 10°C (51°F) and daily highs reaching up to 22°C (72°F), making it feel quite comfortable. However, as the month progresses into October, temperatures drop significantly, with averages around 5°C (41°F) and lows plummeting to -6°C (21°F). Both months experience similar levels of precipitation, around 86-87 mm (3.4 in), but October sees more rainy days, increasing from 14 to 16. Additionally, humidity levels rise, with October showcasing a higher average of 95% compared to September's 92%. For more detailed insights, you can check Joensuu weather in October.
In comparing the weather between September and November, we see a notable shift in temperature and conditions. September experiences milder weather, with an average temperature of 10°C (51°F) and maximums reaching up to 22°C (72°F). In contrast, November brings much colder air, with an average of just 1°C (33°F) and maximums peaking at 10°C (50°F). Additionally, September tends to be wetter, with 87 mm (3.4 in) of precipitation over 14 days, while November sees less rainfall at 64 mm (2.5 in) spread across 13 days. Despite the lower precipitation, humidity remains high in both months, peaking at 94% in November. For more detailed insights, you can visit Joensuu weather in November.
September and December show a stark contrast in weather conditions. In September, temperatures range from a minimum of 0°C (32°F) to a maximum of 22°C (72°F), with an average of 10°C (51°F). The month experiences significant rainfall, totaling 87 mm (3.4 in) over 14 rainy days, coupled with high humidity at 92%. In contrast, December sees much colder temperatures, with a minimum of -23°C (-9°F) and an average of -4°C (25°F), peaking at just 3°C (38°F). Though the total precipitation is lower at 73 mm (2.9 in), it occurs over 16 days, and humidity rises to 98%. For more specific details on December weather in Joensuu, visit Joensuu weather in December.
As summer transitions to autumn, September in Joensuu brings a notable shift in weather dynamics. With an average temperature significantly cooler than the preceding summer months, this time of year introduces brisk mornings and mild afternoons, inviting residents and visitors to savor the last glimpses of warmth. Humidity levels remain high, and rainfall becomes more frequent, creating a lush, vibrant landscape. While the chilly nights may catch some off guard, this month’s unique blend of cool, crisp air and the beautiful autumnal hues makes for a captivating experience. For an in-depth look at how the weather in Joensuu changes throughout the year, visit Joensuu Climate.