Last updated: August 21, 2025
In September, Inuyama, Japan experiences a dynamic climate characterized by a maximum temperature soaring to 37°C (98°F) and an average of 24°C (75°F), providing warm and inviting conditions. The nights can be quite cool, dipping down to a minimum of 11°C (52°F). This month also brings substantial precipitation, with about 225 mm (8.9 in) spread over 15 days, leading to a notably high humidity level of 87%. Visitors can expect a blend of warmth and occasional rain, making it a time of lush greenery and vibrant landscapes.
Inuyama experiences a notable shift in temperatures during September, marking the transition from the extreme heat of summer to the approaching coolness of autumn. With minimum temperatures averaging around 11°C (52°F) and maximums reaching 37°C (98°F), the month provides a comfortable average of 24°C (75°F). This period showcases a significant decrease from the blistering summer highs, yet still retains a warm atmosphere, making it an ideal time for outdoor activities. As September progresses, the cooler nights hint at the changing seasons ahead, setting the stage for the vibrant autumn foliage that follows.
In September, Inuyama, Japan continues to experience a notable amount of rain, with 225 mm (8.9 in) marking the end of the summer monsoon season. This reflects a slight decrease from the preceding months, notably July and August, which both feature higher precipitation levels of 413 mm (16.2 in) and 240 mm (9.4 in) respectively. September also sees a reduction in rainy days to 15, providing a brief respite compared to the intense 22 days of rainfall in July. As the region transitions into autumn, the consistent yet lessened precipitation suggests that while summer's heavy rains are tapering off, the area's wet climate remains persistent, setting the stage for the milder, brisk weather of October.
Inuyama, Japan, experiences a notable shift in humidity throughout the year, creating a uniquely moist environment. September sees humidity levels at 87%, reflecting a slight decline from the peak of 93% in July and 91% in August, marking the tail end of the summer season. This drop aligns with the gradual cooling of autumn, following the high humidity of summer months. Interestingly, while September's levels are still quite elevated, they are comparable to the levels seen in April and October, indicating a seasonal rhythm in humidity that fluctuates, yet consistently trends above 80%. As the year progresses, Inuyama retains a high moisture content in the air, with October poised to follow closely at 85%, ensuring that the essence of this humid climate continues to linger well into the fall.
As summer transitions to autumn in Inuyama, Japan, September sees a notable decline in the UV Index, dropping to 10, which signifies a very high exposure category. This reduction follows a summer of extreme UV levels sustained at 11, where the burn time hiked down to a mere 10 minutes. As the days grow shorter and temperatures cool, residents and visitors can breathe a sigh of relief with a slightly longer allowable sun exposure of 15 minutes before risking sunburn. It’s a time to enjoy the vibrant fall foliage while remaining mindful of UV rays. For more detailed information on UV levels throughout the year, check out Inuyama UV Index.
UV Risk Categories
September in Inuyama, Japan, transitions gracefully from the vibrant summer months, offering a delightful 247 hours of sunshine. As the warm embrace of August's 300 hours begins to wane, the golden rays of early autumn still provide a generous glow, setting the stage for the cooler days ahead. This slight dip in sunshine hours signals a shift in the season, hinting at the rich hues and crisp air of October, which follows with 239 hours of sunlight. Interestingly, the sunshine pattern reveals a peak in late spring and summer, with hours steadily increasing through May before reaching their zenith. As the year progresses, September remains a charming landing between the exuberance of summer and the serene beauty of fall.
Inuyama, Japan, experiences a variable landscape of sunshine throughout the year, with September seeing a 30% chance of sunny weather. This puts it on the lower end of the spectrum when compared to the sunnier months leading into autumn. Notably, the summer months of July and August both have similar probabilities of sunshine at 29% and 27%, respectively, suggesting a trend of reduced visibility of the sun as the season shifts. However, as the year progresses into October, there is a marked increase in sunshine likelihood to 59%, offering a vibrant contrast to the earlier part of fall. Overall, while September isn’t the sunniest month, it serves as a bridge between the summer warmth and the clearer skies of autumn, making each sunlit day a treasure.
As September unfolds in Inuyama, Japan, the days begin to shorten, offering about 12 hours of daylight. This gradual transition hints at the onset of autumn, a season marked by a decrease in sunlight following the summer months, where the city basked in 14 hours during July and June. Following the vibrant richness of the spring and summer, September serves as a gentle bridge, with daylight diminishing slightly from the 13 hours enjoyed in August. The ebb and flow of daylight throughout the year captures the essence of seasonal change, as Inuyama prepares to welcome shorter days and the mellow hues of fall.
In September, the wind in Inuyama, Japan slows to a gentle whisper, averaging just 1.5 m/s (3 mph). This decline in wind speed marks a noticeable transition from the more breezy summer months, where the average reached a modest 2.1 m/s in August. As the seasons shift, this tranquil breeze provides a serene backdrop to the beginnings of autumn, contrasting with the lively gusts of early spring that peaked around 2.6 m/s in March. The trend shows that as the year progresses towards winter, wind speeds remain relatively stable, hovering between 1.5 m/s and 2.5 m/s for several months, creating harmonious conditions perfect for enjoying the picturesque landscapes of Inuyama.
Weather in Inuyama varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Inuyama, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present a stark contrast in weather conditions. In September, temperatures range from a mild 11°C (52°F) to a scorching 37°C (98°F), with an average of 24°C (75°F). The month is characterized by high humidity at 87% and significant rainfall, totaling 225 mm (8.9 inches) over approximately 15 days. In contrast, January sees much cooler temperatures, with a minimum of -9°C (16°F) and a maximum of 17°C (62°F), resulting in an average of just 5°C (41°F). Precipitation is considerably lower in January, with 57 mm (2.2 inches) falling over 8 days, and the humidity remains relatively high at 82%. For a detailed look at January weather patterns, visit Inuyama weather in January.
September and February present contrasting weather patterns that highlight the seasonal changes. In September, temperatures can range significantly, with a minimum of 11°C (52°F) and a maximum reaching up to 37°C (98°F), leading to an average of 24°C (75°F). This month is also marked by high humidity at 87% and considerable rainfall of 225 mm (8.9 in) over about 15 days. In stark contrast, February experiences much colder temperatures, with a minimum of -6°C (22°F) and a maximum of 20°C (69°F), averaging just 5°C (42°F). Precipitation is significantly lower at 68 mm (2.7 in) spread over 7 days, and the humidity is also slightly lower at 79%. For more details on February conditions, check out Inuyama weather in February.
September and March present contrasting weather patterns. In September, temperatures can range from a minimum of 11°C (52°F) to a scorching maximum of 37°C (98°F), with an average temperature around 24°C (75°F). This month is characterized by high humidity at 87%, along with significant rainfall, averaging 225 mm (8.9 in) over 15 days. Conversely, March experiences much cooler conditions, with temperatures varying from -1°C (30°F) to a maximum of 24°C (76°F) and an average of 10°C (50°F). Precipitation in March is lower at 151 mm (5.9 in) over 11 days, coupled with a humidity level of 74%. For more detailed insights into the weather during this month, you can check Inuyama weather in March.
In comparing the weather of September and April, a striking contrast emerges. September typically boasts a much warmer climate, with average temperatures reaching 24°C (75°F) and highs soaring to 37°C (98°F), while April is significantly cooler, featuring an average of 14°C (57°F) and a maximum of 28°C (82°F). Additionally, September experiences higher humidity at 87% and more precipitation, totaling 225 mm (8.9 in) over 15 days, compared to April's 192 mm (7.5 in) across 11 days. For more detailed insights into April's weather, you can refer to Inuyama weather in April.
In September, temperatures are generally warmer compared to May, with lows around 11°C (52°F) and highs reaching up to 37°C (98°F), which contributes to an average temperature of 24°C (75°F). The month experiences significant rainfall, totaling around 225 mm (8.9 in) spread over 15 days, along with high humidity levels at 87%. In contrast, May has cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 32°C (90°F), averaging 19°C (66°F). Rainfall in May is slightly less, at 200 mm (7.9 in) over about 11 days, with humidity levels just marginally lower at 83%. For more detailed information, check Inuyama weather in May.
In comparing the weather of September and June, we see distinct variations in temperature and precipitation. September experiences a wider range of temperatures, with a minimum of 11°C (52°F) and a maximum reaching up to 37°C (98°F), resulting in an average of 24°C (75°F). In contrast, June has a milder temperature profile, ranging from a minimum of 11°C (53°F) to a maximum of 32°C (90°F), with an average of 22°C (72°F). Precipitation is slightly higher in September, totaling 225 mm (8.9 in) over approximately 15 days, compared to June’s 193 mm (7.6 in) across 13 days. Despite the differences in temperature and rainfall, both months maintain a consistent humidity level of 87%. For a closer look at the weather specifics for June, visit Inuyama weather in June.
When comparing the weather in September and July, it becomes clear that both months experience high temperatures and significant humidity, but with some notable differences. In September, the minimum temperature starts at a cooler 11°C (52°F), while the average temperature hovers around 24°C (75°F) and can peak at 37°C (98°F). In contrast, July maintains higher minimum temperatures at 19°C (66°F) and an average of 26°C (79°F), with a maximum reaching up to 39°C (102°F).
Precipitation is also a defining factor; September sees 225 mm (8.9 in) over 15 days, while July experiences substantially more rainfall at 413 mm (16.2 in) across 22 days. Humidity levels are slightly lower in September at 87% compared to July's 93%. Overall, while both months are warm and humid, July tends to be hotter and wetter, as detailed in the link Inuyama weather in July.
In comparing the weather of September and August, September presents a notable decrease in average temperature, with a minimum of 11°C (52°F) and an average of 24°C (75°F), while August boasts warmer averages, marked by a minimum of 19°C (66°F) and an average of 28°C (83°F). The maximum temperatures also reflect this trend, with September peaking at 37°C (98°F) compared to August's higher maximum of 40°C (105°F). Additionally, September experiences slightly less precipitation at 225 mm (8.9 in) over 15 days, versus August's 240 mm (9.4 in) over 16 days. Humidity levels are similarly high, with September at 87% and August slightly higher at 91%, making both months feel quite humid. For more detailed insights into August weather, you can check Inuyama weather in August.
September generally boasts warmer temperatures, with an average high of 24°C (75°F) and peaks reaching up to 37°C (98°F), while October sees a significant drop to an average of 18°C (65°F), with maximum temperatures around 32°C (89°F). Precipitation is high in both months, but September experiences slightly more rainfall at 225 mm (8.9 in) over 15 days, compared to October's 201 mm (7.9 in) over 12 days. Humidity levels remain quite similar, with September at 87% and October at 85%, yielding a noticeably steamy environment in September contrasted with the crisp autumn air of October. For more details on the October climate, visit Inuyama weather in October.
September and November present strikingly different weather patterns. In September, temperatures range from a minimum of 11°C (52°F) to a maximum of 37°C (98°F), accompanied by high humidity at 87% and significant precipitation totaling 225 mm (8.9 in) over 15 days. In contrast, November experiences a considerable drop in temperatures, with a minimum of 0°C (33°F) and an average of 12°C (54°F), peaking at 24°C (75°F). The precipitation is also lighter in November, totaling only 63 mm (2.5 in) over 6 days, with a marginally lower humidity level of 83%. For more insights into the conditions during this month, you can visit Inuyama weather in November.
The weather in September is characterized by warm temperatures, ranging from a minimum of 11°C (52°F) to a maximum of 37°C (98°F), and an average of 24°C (75°F). This month also sees a significant amount of rainfall, with 225 mm (8.9 in) of precipitation over 15 days, and a high humidity level of 87%. In contrast, December experiences much colder weather, with temperatures dropping to a minimum of -5°C (24°F) and reaching a maximum of 19°C (67°F), averaging around 7°C (45°F). Precipitation is notably lower in December, totaling 68 mm (2.7 in) over just 8 days, and humidity levels are slightly reduced at 83%. For a detailed look at December's climate, you can check out Inuyama weather in December.
September in Inuyama marks a transition from the sweltering summer heat to a more moderate climate, as temperatures begin to drop yet can still reach highs of 37°C (98°F). This month is characterized by high humidity, which lingers around 87%, making the air feel warmer than it actually is. Unlike the drier months, September experiences considerable rainfall, averaging 225 mm spread over 15 days, contributing to a lush environment. As the month progresses, the pleasant average temperatures offer a refreshing respite, signaling the approach of autumn. For more insights on what to expect year-round, explore Inuyama Climate.