Last updated: August 21, 2025
In Yamagata, Japan, September weather offers a striking contrast as temperatures gradually shift from the summer heat. The maximum temperature can reach a sweltering 33°C (91°F), while the average settles at a comfortable 19°C (67°F). However, nights can feel quite cool, dipping to a chilly 7°C (44°F). Rainfall is common during this month, with a total of 110 mm (4.3 in) spread over about 14 days, contributing to a significant humidity level of 86%. Visitors can expect both warmth and a refreshing atmosphere, making September a unique time to experience Yamagata's seasonal transition.
In September, Yamagata, Japan, transitions into the embrace of autumn, showcasing a delightful climate that strikes a balance between warmth and coolness. With minimum temperatures around 7°C (44°F) and averages of 19°C (67°F), the month offers a pleasant reprieve from the summer heat. The maximums can soar up to 33°C (91°F), hinting at the lingering warmth of summer days. As the foliage begins to change, visitors can enjoy the vibrant landscapes while experiencing cooler evenings—perfect for cozy gatherings or stunning outdoor explorations. Overall, September in Yamagata is characterized by comfortable temperatures, making it an ideal time to appreciate the natural beauty of this scenic region.
In September, Yamagata experiences a moderate precipitation level, with 110 mm (4.3 in) of rain falling across approximately 14 days. This marks a slight decrease from the summer months, where July and August brought heftier downpours of 239 mm (9.4 in) and 194 mm (7.6 in), respectively. As autumn begins to set in, the transition can be felt, reflected in both reduced rainfall and fewer wet days. This shift signifies a gradual retreat from the intense summer rains, paving the way for the drier conditions typical of later months, such as October with 151 mm (5.9 in), while hinting at the approaching winter landscape.
In Yamagata, Japan, September marks a transitional moment in humidity levels. With an average humidity of 86%, the air remains notably moist, just slightly lower than the peak summer months of July and August, which both soared to 92%. This late summer dip sets the stage for the gradual decrease that follows, as humidity typically trends downward into the fall. Interestingly, September's figures reflect the lingering warmth of summer, yet hint at the approaching crispness of autumn. As the year progresses, the humidity will continue to ease, ultimately settling at 82% in October, illustrating Yamagata's distinct seasonal shifts and the interplay between warmth and moisture in the air.
As summer fades into autumn in Yamagata, Japan, the UV Index begins to decline, yet September still boasts a very high UV Index of 9, with a burn time of just 15 minutes. This marks a slight decrease from the intense conditions of the previous two months, which reached an extreme level of 11 in both July and August. With high indices reported in early spring, peaking sharply in the late summer, September serves as a reminder of the lingering intensity of sunlight as fall approaches. Residents and visitors alike should remain cautious about sun exposure, even as the season transitions. For more details on UV levels throughout the year, check out Yamagata UV Index.
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As summer wanes, September in Yamagata, Japan, brings a delightful transition into autumn with 248 hours of sunshine. This month stands out as a gentle tapering from the vibrant 295 hours in May and the sun-drenched 283 hours of June. While still basking in ample sunlight, September marks a shift from the peak summer days, reflecting a trend where daylight gradually dwindles toward winter’s embrace. Compared to July and August, which enjoy longer sunlit hours, September offers a comforting moderation, creating a perfect backdrop for enjoying the rich hues of fall as they begin to paint the landscape. The sunshine not only enhances the beauty of the region but also invites locals and travelers alike to savor the mild, radiant days before the cooler months set in.
In September, Yamagata experiences a 25% chance of sunny weather, marking a slight uptick compared to the summer months. This shift suggests a transition as the heavy cloud cover of August begins to lift, offering budding opportunities for sunshine. While the overall likelihood remains modest, September's sun can be a delightful reprieve as the region welcomes the crispness of early autumn. Interestingly, this month outshines the rainy peaks of July and August—which linger at only 20%—indicating that as the summer heat wanes, Yamagata might surprise visitors and locals alike with glimpses of clear skies that invite outdoor exploration.
As September unfolds in Yamagata, Japan, the daylight begins to wane, transitioning from the lush brightness of summer to the crispness of autumn. This month grants about 12 hours of daylight, a gentle decline from the peak of 14 hours in the vibrant summer months of June through August. In contrast, the year started with just 9 hours in January, gradually increasing to a delightful maximum in May, where the sun generously beams for 14 hours. As the seasons shift, this gradual decrease mirrors nature's transition, reminding us of the cyclical patterns of light and dark, setting the stage for the cozy embrace of fall.
As September unfolds in Yamagata, Japan, the gentle breeze begins to stir, with an average wind speed of 1.8 m/s (4 mph). This marks a subtle uptick from the languid summer months, where winds typically lingered around 1.4 to 1.7 m/s (3 to 4 mph). The transition into fall heralds a gradual increase in wind intensity, setting the stage for October’s 2.0 m/s (4 mph). This trend of rising winds reflects the shift in seasons, as nature prepares for the robust gusts of winter, where averages rise again to 2.7 m/s (6 mph) by December. September’s winds, while mild, signal the onset of change, inviting the crispness of autumn to dance through the landscapes of Yamagata.
Weather in Yamagata varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Yamagata, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures range from a minimum of 7°C (44°F) to a maximum of 33°C (91°F), creating a warm and comfortable atmosphere with an average of 19°C (67°F). The month experiences around 110 mm (4.3 in) of precipitation over approximately 14 days, coupled with high humidity levels at 86%. In contrast, January presents a starkly different climate, with temperatures dipping significantly, where the minimum reaches -16°C (4°F) and the maximum only climbs to 8°C (46°F), averaging -2°C (29°F). This colder month sees a higher total precipitation of 125 mm (4.9 in) spread across 21 days and slightly lower humidity at 80%. For a detailed look at January weather, you can visit Yamagata weather in January.
September and February present a stark contrast in weather patterns. In September, temperatures range from a mild 7°C (44°F) to a warm 33°C (91°F), with an average of 19°C (67°F). The month experiences considerable precipitation at 110 mm (4.3 in) over 14 days, accompanied by high humidity of 86%. In contrast, February sees much colder conditions, with temperatures dropping to a minimum of -14°C (7°F) and peaking at 11°C (52°F), averaging around -1°C (31°F). Precipitation in February is slightly higher at 116 mm (4.5 in), but it occurs over more days, totaling 20. The humidity in February is lower, at 79%, providing a drier feel despite the cold. For more detailed information on February weather, visit Yamagata weather in February.
In comparing the weather between September and March, notable differences emerge. September boasts a much milder temperature range, with a minimum of 7°C (44°F) and a maximum of 33°C (91°F), leading to an average temperature of 19°C (67°F). It is also characterized by high humidity at 86% and receives about 110 mm (4.3 in) of precipitation over approximately 14 days. In contrast, March experiences significantly colder weather, with temperatures ranging from a minimum of -13°C (9°F) to a maximum of 19°C (66°F) and an average of only 4°C (39°F). The month sees slightly more precipitation at 119 mm (4.7 in) spread across 18 days, and lower humidity at 77%. For a more detailed view of March's climate, you can visit Yamagata weather in March.
September and April present distinctly different weather patterns. In September, temperatures range from a minimum of 7°C (44°F) to a maximum of 33°C (91°F), with a warm average of 19°C (67°F), making it a warmer month overall. In contrast, April's temperatures are cooler, with a minimum of -5°C (24°F) and a maximum of 25°C (77°F), averaging around 8°C (47°F). Both months experience significant rainfall, with September receiving 110 mm (4.3 in) over 14 days and April slightly wetter at 116 mm (4.6 in) over 13 days. Additionally, September has higher humidity at 86%, compared to April's 75%, contributing to a more humid feel during the former. For a deeper look into April's conditions, you can check Yamagata weather in April.
September weather contrasts with May in several notable ways. While September sees warmer temperatures, with a minimum of 7°C (44°F) and an average of 19°C (67°F), May starts off cooler, with a minimum of 2°C (36°F) and an average of 15°C (59°F). Both months experience similar maximum temperatures, peaking at around 31°C (88°F) in May and 33°C (91°F) in September. Rainfall also differs slightly, with September receiving more precipitation at 110 mm (4.3 in) over 14 days compared to May's 93 mm (3.7 in) over 13 days. Additionally, humidity is slightly higher in September at 86%, compared to May's 80%. For a closer look at May weather patterns, visit Yamagata weather in May.
In comparing the weather between September and June, we observe some striking similarities and minor differences. Both months have a minimum temperature of 7°C (44°F) and an average temperature around 19°C (66°F-67°F), indicating a generally mild climate. However, September tends to peak slightly higher with a maximum of 33°C (91°F) compared to June’s 32°C (90°F). Precipitation levels are somewhat higher in September at 110 mm (4.3 in) over 14 days, compared to June's 98 mm (3.8 in) over 13 days, resulting in slightly wetter conditions. Humidity levels are also quite comparable, with September at 86% and June at 87%. For more insights into the weather patterns of June, you can visit Yamagata weather in June.
When comparing the weather in September and July, notable differences emerge. September experiences a broader temperature range, with minimums dropping to 7°C (44°F) and average highs reaching 33°C (91°F), while July maintains milder minimums at 14°C (57°F) and an average of 23°C (73°F). Both months can peak at similar maximum temperatures, but September tends to have lower humidity at 86%, compared to July's higher average of 92%. Additionally, July sees significantly more precipitation, with 239 mm (9.4 in) over 18 days compared to September's 110 mm (4.3 in) across 14 days. This information showcases July as not only warmer but also wetter than September. For more detailed insight, you can check Yamagata weather in July.
In September, the weather experiences a noticeable shift compared to August. While temperatures in September range from a minimum of 7°C (44°F) to a maximum of 33°C (91°F), August boasts higher temperatures with a minimum of 12°C (53°F) and a peak of 36°C (97°F). Additionally, September sees an average temperature of 19°C (67°F), significantly lower than August's average of 24°C (75°F). Precipitation also decreases in September, with 110 mm (4.3 in) falling over 14 days, compared to August's 194 mm (7.6 in) over 18 days. Humidity remains high in both months, but September's 86% is slightly less than August's 92%. For a detailed look, you can visit Yamagata weather in August.
September typically offers warmer temperatures, with a minimum of 7°C (44°F) and an average high of 33°C (91°F), while October sees cooler conditions, plunging to a minimum of 2°C (36°F) and an average high of 27°C (81°F). Precipitation increases in October to 151 mm (5.9 in) over 13 days compared to September's 110 mm (4.3 in) over 14 days, making the latter a slightly wetter month. Despite the increase in rainfall, humidity slightly decreases from 86% in September to 82% in October, indicating a shift towards more comfortable weather despite the cooler temperatures. For a detailed insight into October's climate, check out Yamagata weather in October.
September and November present stark contrasts in weather. In September, temperatures range from a mild 7°C (44°F) at night to a warm 33°C (91°F) during the day, marking it as one of the warmer months with an average of 19°C (67°F). The humidity is notably high at 86%, accompanied by 110 mm (4.3 in) of precipitation over 14 days. In contrast, November experiences a significant drop in temperature, with lows plunging to -6°C (22°F) and daytime highs reaching a maximum of 21°C (70°F), averaging only 7°C (45°F). The precipitation decreases to 80 mm (3.1 in) over the same number of rainy days, while humidity levels slightly lower to 79%. For more detailed information, check out Yamagata weather in November.
In comparing the weather patterns of September and December, it's evident that there is a marked shift in both temperature and precipitation. September offers a warmer atmosphere with temperatures ranging from a minimum of 7°C (44°F) to a maximum of 33°C (91°F) and an average of 19°C (67°F), accompanied by considerable humidity at 86%. In contrast, December features a much colder climate, where temperatures drop significantly, with a minimum of -10°C (13°F) and an average of just 1°C (34°F), peaking at 16°C (62°F). Additionally, December experiences higher precipitation levels with 146 mm (5.7 in) spread across 23 days, compared to September's 110 mm (4.3 in) over 14 days. For more detailed insights, you can explore Yamagata weather in December.
As September unfolds in Yamagata, it marks a transitional period from the warmth of summer to the cooler embrace of autumn. This month typically experiences a delightful mix of warmth and refreshing coolness, with temperatures dipping notably during the nights. Compared to the hot, dry summer months, September introduces a higher level of humidity and a noticeable increase in precipitation, making the landscape lush and vibrant. With about half of the month’s days marked by rain, the air is often thick with moisture, resulting in an atmosphere ripe for stunning foliage to come. If you're interested in understanding how September fits into the broader patterns, check out Yamagata Climate for a comprehensive overview.