Last updated: August 21, 2025
September in Jyväskylä, Finland ushers in a blend of crisp air and vibrant colors, with temperatures ranging from a pleasant maximum of 22°C (72°F) to a chilly minimum of -2°C (28°F). The average temperature hovers around 10°C (50°F), making it a transitional month as autumn sets in. Expect a total precipitation of 73 mm (2.9 in) over 12 days, contributing to the landscape's lushness. With humidity levels high at 91%, the air feels refreshing, perfect for indulging in the beautiful outdoor scenery that September in Jyväskylä has to offer.
As September unfolds in Jyväskylä, Finland, the temperatures begin to shift notably from the summer warmth, creating a refreshing transition into autumn. The month typically sees minimums dipping to around -2°C (28°F), while the average temperature hovers at a comfortable 10°C (50°F). During the day, highs can reach a pleasant 22°C (72°F), allowing for delightful outdoor activities amidst the crisp air. This distinct decline in warmth reflects a gradual cooling trend following the summer months, marking September as a pivotal moment where lush greenery starts to give way to the brilliant colors of fall. The contrast of the lingering warmth with the encroaching chill makes it an enchanting time to experience Jyväskylä's natural beauty.
September in Jyväskylä, Finland, brings a noteworthy shift as summer transitions into autumn, marked by a significant precipitation amount of 73 mm (2.9 in) over roughly 12 days. This is a slight decrease from the wet August, which recorded 87 mm (3.4 in), yet still maintains a robust volume indicative of the changing season. As the air cools and the leaves begin to turn, the rainfall serves to nourish the vibrant autumn landscape, setting the stage for the months to come. With precipitation levels consistently around the 70 mm mark in recent months, Jyväskylä experiences a steady rhythm of wet and dry days, perfectly embodying the natural ebb and flow of Finland’s climatic cycles.
In September, Jyväskylä experiences a notable uptick in humidity, reaching 91% as summer transitions into autumn. This marks a slight recovery from the drier months of June and July, where humidity dipped to 74% and 80%, respectively. As the city welcomes the first hints of fall, humidity levels remain high, slightly lower than the peaks of winter months but significantly elevated compared to the early summer. This pattern reflects a general trend in Jyväskylä, where humidity gradually decreases from the winter highs of 99% in January to the summer's lows, before rising again as the seasons change. The dynamic shifts in humidity not only shape the region's weather but also add to the vibrant, crisp atmosphere typical of Finnish early autumn.
In September, Jyvaeskylae experiences a moderate UV Index of 3, with a recommended burn time of 30 minutes. This places it back towards the safer end of the spectrum as summer wanes, following the high indices of June and July. As the days shorten and temperatures cool, the UV exposure gradually decreases, aligning with the trend seen throughout the previous months. It's a reminder that while sun safety remains important, the risk is lower this time of year. For further insights and details on UV exposure, check the Jyvaeskylae UV Index.
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In Jyväskylä, Finland, September offers a gentle transition from the bright summer days to the cooler embrace of autumn. With 243 hours of sunshine, this month sees a significant drop from the 388 hours enjoyed in August, yet it remains a delightful time to savor the lingering warmth. The trend throughout the year indicates that sunlight peaks in the summer months, notably June and July, before gradually receding as autumn sets in. As September ushers in shorter days, it invites a comforting nostalgia for the summer's glow while still providing ample opportunity for outdoor exploration amidst the vibrant fall foliage. This month beautifully captures the essence of seasonal change, balancing the waning sunlight with the arrival of crisp, refreshing air.
In September, the chance of sunny weather in Jyväskylä begins to wane, dropping to 22% after the vibrant summer months. This slight decline follows the peak of July and June, where sunshine was almost guaranteed at 50% and 49% respectively. As autumn approaches, the previously higher probabilities of sunshine in summer months give way to a more uncertain climate, reminiscent of April and May, which also saw similar trends but with better odds for sun. The transition into fall heralds a noticeable shift, as daylight hours shorten and the probability of cloud cover increases, setting the stage for the chillier days to come.
In Jyväskylä, Finland, September marks a notable transition as daylight begins to wane following the sun-filled summer months. After basking in up to 19 hours of daylight in June, September settles into a more moderate rhythm, offering about 12 hours of light. This reflects a gradual but natural shift from the vibrant brightness of summer, as daylight decreases into the autumn months. The trend through the year showcases an increase in daylight from the depths of winter, with only 6 hours in January, rising to a peak in June, and then a steady descent as the year progresses. September serves as a gentle reminder of the changing seasons, balancing the lingering warmth of summer with the impending coolness of fall.
As September arrives in Jyväskylä, the gentle whispers of the wind continue to create a serene atmosphere, with an average wind speed of 3.1 m/s (7 mph). This marks a slight decrease from the gusty embrace of August, which reaches 3.4 m/s (8 mph). The cooling transition into autumn is palpable, as the wind speeds begin to trend upwards in the following months. Historically, September’s winds are milder than those of the brisk October, which sweeps in with an average of 4.1 m/s (9 mph). Throughout the year, Jyväskylä witnesses a consistent ebb and flow, peaking in the autumn months, suggesting that the September breezes serve as a gentle precursor to the more vigorous winds that will follow as winter approaches.
Weather in Jyvaeskylae varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Jyvaeskylae, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather, reflecting the transition from late summer to deep winter. In September, temperatures range from a minimum of -2°C (28°F) to a comfortable maximum of 22°C (72°F), with an average of 10°C (50°F). The month experiences around 73 mm (2.9 in) of precipitation over 12 days, along with a relatively high humidity of 91%. In contrast, January plunges into much colder temperatures, with a minimum of -27°C (-16°F) and an average of -5°C (23°F), peaking at just 7°C (46°F). This month sees lower precipitation levels at 46 mm (1.8 in) over 11 days, but the humidity rises to a near-saturation point at 99%. For more information on January weather in Jyväskylä, you can visit Jyvaeskylae weather in January.
September and February present stark contrasts in weather. In September, temperatures range from a low of -2°C (28°F) to a pleasant average of 10°C (50°F), peaking at 22°C (72°F). This month also sees 73 mm of precipitation over 12 days, with a humidity level of 91%, creating a generally damp atmosphere. In contrast, February is much colder, with temperatures plummeting from a min of -29°C (-19°F) to an average of -6°C (21°F), and peaking at 7°C (45°F). The month receives less precipitation, totaling 44 mm over 10 days, yet it has higher humidity at 97%, contributing to the frigid feel. For more detailed insights, you can check out Jyvaeskylae weather in February.
In comparing the weather of September and March, one can observe significant differences in both temperature and precipitation patterns. September experiences milder temperatures, with an average of 10°C (50°F) and a maximum of 22°C (72°F), whereas March is notably colder, averaging -3°C (28°F) and peaking at just 12°C (54°F). Additionally, while September sees a higher total precipitation of 73 mm (2.9 in) over 12 days, March has less rainfall at 42 mm (1.6 in) but slightly more humid conditions, with a humidity level of 95% compared to September's 91%. For more details on the specifics of March weather, you can check out this link: Jyvaeskylae weather in March.
When comparing the weather in September and April, we observe notable differences in temperature and precipitation. September boasts a milder average temperature of 10°C (50°F), with daytime highs reaching up to 22°C (72°F), while April sees a chillier average of just 2°C (36°F) and minimum temperatures plunging to -15°C (6°F). Additionally, September tends to be wetter, with 73 mm (2.9 in) of precipitation over 12 days, compared to April's 45 mm (1.8 in) across 11 days. Humidity levels are also slightly higher in September at 91%, compared to 87% in April. For a deeper look at April weather specifics, check out Jyvaeskylae weather in April.
When comparing the weather in September and May, both months exhibit cool temperatures, but with distinct differences. September generally has a wider temperature range, with minimums around -2°C (28°F) and highs reaching up to 22°C (72°F). In contrast, May tends to be colder at night, with a minimum of -4°C (25°F) and slightly warmer maximums peaking at 27°C (82°F). Precipitation levels are relatively similar, with September experiencing 73 mm (2.9 in) over about 12 days, while May sees slightly less at 63 mm (2.5 in) across 10 days. Additionally, September's humidity is higher at 91%, compared to May's more comfortable 78%. For a detailed look at May's weather conditions, check out Jyvaeskylae weather in May.
In comparing the weather of September and June, we see distinct differences in temperature and humidity. September experiences milder conditions, with average temperatures ranging from a chilly 10°C (50°F) to a maximum of 22°C (72°F), while June boasts warmer averages, reaching as high as 31°C (89°F). Additionally, June tends to be less humid at 74%, compared to September's high humidity level of 91%. Precipitation is slightly less in June, with an average of 60 mm (2.4 in) over 11 days, whereas September sees a bit more rain at 73 mm (2.9 in) over 12 days. For a closer look at June's weather in Jyväskylä, you can visit Jyvaeskylae weather in June.
September and July offer distinct contrasts in weather patterns. In September, temperatures range from a chilly minimum of -2°C (28°F) to a comfortable maximum of 22°C (72°F), with an average of about 10°C (50°F). The month experiences significant precipitation, totaling 73 mm (2.9 in) over 12 days and a high humidity level of 91%. In contrast, July boasts much warmer conditions, with a minimum temperature of 6°C (44°F) and a maximum of 31°C (87°F), while maintaining an average of 17°C (63°F). The precipitation in July is slightly lower at 71 mm (2.8 in) across the same number of days, accompanied by a more moderate humidity of 80%. For more detailed insights, you can explore Jyvaeskylae weather in July.
September weather shows a significant drop in temperatures compared to August, with September's average sitting at a cooler 10°C (50°F) compared to August's 15°C (60°F). The maximum temperatures in September peak at 22°C (72°F), falling well short of August's high of 31°C (88°F). Additionally, September experiences more precipitation over fewer days, totaling 73 mm (2.9 in) across 12 days, whereas August sees 87 mm (3.4 in) over 14 days. The humidity also slightly increases in September to 91%, compared to August's 85%. For a detailed look at August weather, visit Jyvaeskylae weather in August.
In September, temperatures in Jyväskylä typically range from a minimum of -2°C (28°F) to a maximum of 22°C (72°F), with an average of 10°C (50°F). This month sees about 73 mm (2.9 in) of precipitation over approximately 12 days, accompanied by high humidity at 91%. In contrast, October experiences cooler conditions, with temperatures dipping to a minimum of -9°C (15°F) and an average of 5°C (41°F), while the maximum reaches 18°C (65°F). Precipitation slightly increases to 76 mm (3.0 in) over 15 days, and humidity rises to 95%. For more detailed insights, check the Jyvaeskylae weather in October.
September and November present quite distinct weather patterns. In September, temperatures range from a low of -2°C (28°F) to a comfortable average of 10°C (50°F), peaking at 22°C (72°F). The month also sees 73 mm (2.9 in) of precipitation over 12 days, with humidity levels at a high 91%. In contrast, November brings colder temperatures, with minimums dropping to -14°C (7°F) and an average of just 1°C (34°F), reaching a maximum of 11°C (51°F). Although November experiences slightly less precipitation at 61 mm (2.4 in) over 13 days, the humidity remains high at 94%. For more details on the weather during this month, you can check out Jyvaeskylae weather in November.
September and December present strikingly different weather patterns. In September, temperatures are milder, ranging from a minimum of -2°C (28°F) to a maximum of 22°C (72°F), with an average temperature of 10°C (50°F). The month experiences 73 mm (2.9 in) of precipitation over 12 days, coupled with high humidity at 91%. Conversely, December brings a chillier climate, with temperatures dropping significantly, featuring a minimum of -22°C (-7°F) and a maximum of just 4°C (40°F), resulting in an average temperature of -3°C (26°F). Although precipitation is slightly lower at 67 mm (2.6 in), it occurs on 14 days, and humidity reaches a high of 98%. For more details on December weather conditions, check out Jyvaeskylae weather in December.
As September unfolds in Jyväskylä, it marks a transition into the cooler embrace of autumn, standing in contrast to the warmer summer months. With average temperatures dipping and crisp mornings giving way to foggy afternoons, the weather invites a different rhythm of life—perfect for savoring the changing colors of nature. While rainfall is more prevalent, celebrated by 12 days of light showers, the thick humidity of 91% adds a unique texture to the air, enhancing the essence of this enchanting season. For a deeper dive into how Jyväskylä's weather patterns shape the months throughout the year, explore the insights available at Jyvaeskylae Climate.