Last updated: August 21, 2025
In Shirakawa, Japan, September offers a blend of warm and crisp weather, with maximum temperatures reaching 32°C (91°F) and an average of 20°C (69°F). Visitors can expect cooler evenings, as nighttime lows drop to around 9°C (49°F). The month is notably wet, accumulating 163 mm (6.4 in) of precipitation over approximately 17 days, leading to a high humidity level of 84%. This combination creates a vibrant atmosphere, perfect for exploring the lush landscapes and experiencing the unique charm of Shirakawa during the transition from summer to autumn.
In September, Shirakawa experiences a delightful transition as summer gently hands over the reins to autumn. Temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (91°F), with an average of about 20°C (69°F), providing a comfortable climate for outdoor activities. This month marks a noticeable shift as the heat of August begins to wane, paving the way for cooler evenings. The crisp air, coupled with vibrant foliage, creates a picturesque backdrop, making September an ideal time to explore the scenic beauty of the region.
September in Shirakawa, Japan, marks a transition into the wetter autumn months, with precipitation reaching 163 mm (6.4 in) over 17 days. This increase follows a summer peak in July, where rainfall totals soared to an impressive 253 mm (10.0 in), and indicates a shift from the more sporadic showers of early summer to more consistent rain patterns. As temperatures gradually cool, September's rainfall is crucial for replenishing local water sources, setting the stage for the heavier rains of October, which averages 221 mm (8.7 in). The rain not only nourishes the rich landscapes surrounding Shirakawa but also brings a refreshing vitality to the community, showcasing the region's dynamic climate.
As summer fades in Shirakawa, September marks a notable transition in humidity levels. With an average humidity of 84%, the air remains noticeably moist, though it begins to ease from the peak summer figures of 92% in July and 90% in August. This slight dip indicates the onset of autumn, offering a reprieve from the sweltering heat and paving the way for more comfortable conditions. Interestingly, as we look back over the months, June and July stand out as the most humid times of the year, while September maintains a significant moisture level, hinting at the lingering warmth of summer before the drier months of October and November arrive. Overall, the trend reveals a gradual decrease in humidity after the summer peak, setting the stage for the beautiful fall season ahead.
In September, Shirakawa experiences a significant transition in its UV Index, registering a value of 9 which categorizes it as very high. This marks a decline from the peak 11 recorded in the summer months of June through August, but caution is still warranted as the burn time for unprotected skin decreases to 15 minutes. As the region shifts into fall, the UV exposures remain substantial, highlighting the importance of sun protection even as temperatures begin to cool. With these considerations in mind, residents and visitors alike are encouraged to stay informed about UV indices throughout the year. For more detailed insights, check out the complete Shirakawa UV Index.
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As September unfolds in Shirakawa, the region benefits from 240 hours of sunshine, making it a delightful transition from the vibrant summer months. Following the peak of 288 hours in May and a robust 283 hours in August, the early autumn light remains generous, providing a golden backdrop for the breathtaking landscapes. This gradual decline in sunshine hours is part of a natural rhythm, where the warmth of summer gives way to the cooler, crisper days of fall. In comparison to the 263 hours in March and 276 hours in April, September’s sun continues to shine brightly, ensuring that the beauty of Shirakawa resonates well into the changing seasons, before settling into the more subdued light of October with just 209 hours expected. This gentle tapering of daylight serves as a reminder of nature's cycle, inviting residents and visitors alike to savor the charm of the autumn skies.
In September, Shirakawa experiences a 21% chance of sunny weather, marking it as one of the more overcast months of the year. This follows a trend from the summer months, where July and August show similar low probabilities of sunshine, suggesting that the region is transitioning into the cooler, cloudier season. Interestingly, this likelihood is slightly lower than the sunniest months of January and February, which boast chances of 46% and 61%, respectively. As autumn approaches, residents and visitors alike can expect a significant increase in cloud cover compared to the brighter spring months, with May exhibiting a relatively higher 25% chance. Overall, if you're hoping for sun in September, you may want to keep your expectations tempered, as the pattern suggests a shift toward more typical fall weather.
In September, Shirakawa, Japan enjoys 12 hours of daylight, marking a subtle transition as summer begins to yield to autumn. This month experiences a gradual decrease in daylight, following the peak of 14 hours seen in both June and July, and slightly trailing the 13 hours observed in August. The shift is emblematic of the changing seasons, where the days grow shorter as the year progresses towards winter. As the vibrant hues of autumn emerge, residents and visitors alike relish the gentle waning of daylight, creating a beautiful backdrop for outdoor activities and seasonal festivities.
As summer gives way to autumn in Shirakawa, Japan, September ushers in a gentle breeze with an average wind speed of 2.1 m/s (5 mph). This shift marks a continuation of a cooling trend that began in July when the wind reached its lowest point. While July’s soothing whispers of 1.6 m/s (3 mph) heralded the warmth of summer, the winds gradually picked up through September, matching the mild gusts of late spring and early summer. October and November maintain this enchanting calm with slightly higher speeds, suggesting a seasonal rhythm where nature subtly prepares for the brisker winds of winter. This delicate balance creates a tranquil atmosphere, perfect for experiencing the stunning autumn foliage that Shirakawa is renowned for.
Weather in Shirakawa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Shirakawa, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather is characterized by warm temperatures, with a minimum of 9°C (49°F) and an average high reaching 32°C (91°F). This month experiences significant precipitation, totaling 163 mm (6.4 in) over approximately 17 days, coupled with high humidity levels at 84%. In contrast, January brings a stark shift, with temperatures plummeting to a minimum of -11°C (12°F) and an average high of only 12°C (54°F). Precipitation decreases to 46 mm (1.8 in) over about 9 days, and humidity drops to 76%. The drastic differences between the two months highlight the transition from the warmth and moisture of late summer to the cold and comparatively drier conditions of winter. For more details on January weather in the area, check Shirakawa weather in January.
In September, the weather is considerably warm, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 32°C (91°F), creating an average of 20°C (69°F). This month also sees substantial rainfall, totaling 163 mm (6.4 in) over 17 days, accompanied by high humidity levels of 84%. In contrast, February experiences much colder conditions, with temperatures dropping to a minimum of -7°C (20°F) and peaking at 19°C (66°F), averaging just 2°C (36°F). The precipitation in February is significantly lower at 42 mm (1.7 in) over 7 days, with a humidity level of 75%. For more specifics, you can explore Shirakawa weather in February.
September and March present contrasting weather patterns. In September, temperatures range from a mild 9°C (49°F) at night to a warm 32°C (91°F) during the day, with an average of 20°C (69°F). The humidity is high at 84%, and the month sees significant rainfall of 163 mm (6.4 in) over 17 days. In contrast, March offers much cooler conditions, with temperatures dipping as low as -5°C (22°F) and peaking at 23°C (73°F), averaging only 6°C (43°F). This month has less rainfall at 134 mm (5.3 in) spread across 11 days and lower humidity at 72%. For more details, check out Shirakawa weather in March.
In comparing the weather of September and April, we see striking differences in temperature and precipitation patterns. September boasts a wide temperature range, with minimums around 9°C (49°F), average highs reaching up to 32°C (91°F), and an overall average of 20°C (69°F). The month experiences significant rainfall, accumulating 163 mm (6.4 in) over 17 days, coupled with high humidity at 84%. In contrast, April features cooler temperatures, with a minimum of -2°C (29°F) and an average of 10°C (51°F), peaking at 28°C (83°F). It is also drier, with total precipitation at 119 mm (4.7 in) over 13 days and lower humidity at 73%. For a closer look at April weather in Shirakawa, you can check out Shirakawa weather in April.
In comparing September and May weather, September generally presents warmer average temperatures, with a minimum of 9°C (49°F) and an average of 20°C (69°F) compared to May's lower minimum of 2°C (36°F) and average of 16°C (62°F). Both months can reach similar maximum temperatures of 32°C (91°F) in September and 33°C (91°F) in May. However, September experiences more precipitation with 163 mm (6.4 in) spread over 17 days, while May has slightly less rainfall at 145 mm (5.7 in) over 14 days. The humidity is relatively high in both months, with September at 84% and May at 80%. For more detailed information, you can check Shirakawa weather in May.
In comparing the weather of September and June, both months show similar temperature ranges, with September slightly warmer on average, reaching up to 32°C (91°F) compared to June's maximum of 31°C (89°F). However, September experiences more rainfall, with 163 mm (6.4 in) over 17 days, while June has 139 mm (5.5 in) across 15 days. Humidity levels are also comparable, with September at 84% and June slightly higher at 87%. For more detailed information, you can check Shirakawa weather in June.
September and July exhibit notably different weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (91°F), with an average of 20°C (69°F). The month experiences 163 mm (6.4 in) of precipitation over 17 days, along with a relatively high humidity level of 84%. In contrast, July is warmer, with temperatures varying from 15°C (59°F) at night to a max of 34°C (94°F), averaging around 23°C (74°F). Additionally, July sees greater rainfall, accumulating 253 mm (10.0 in) over 23 days and a slightly higher humidity of 92%. For specific insights into the weather conditions during July, you can check Shirakawa weather in July.
In comparing the weather between September and August, September experiences a wider temperature range, with minimums dropping to 9°C (49°F) and maximums reaching up to 32°C (91°F). In contrast, August is generally warmer, featuring a higher average temperature of 25°C (77°F) and peak temperatures of 36°C (96°F). Regarding precipitation, September sees slightly more rain at 163 mm (6.4 in) over 17 days, compared to August's 147 mm (5.8 in) over 16 days. Humidity levels also remain high in both months, but August is slightly more humid at 90% compared to September's 84%. For a closer look at the specifics of August weather, you can visit Shirakawa weather in August.
September and October present distinct shifts in weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (91°F), with an average of 20°C (69°F). This month experiences considerable precipitation, totaling 163 mm (6.4 in) over 17 days, accompanied by high humidity levels of 84%. In contrast, October sees cooler temperatures, dropping to a minimum of 2°C (36°F) and averaging 15°C (59°F), with a maximum of 28°C (82°F). Precipitation increases to 221 mm (8.7 in) but occurs over fewer days, totaling 13, and the humidity slightly decreases to 80%. For more detailed insights into October weather, you can visit Shirakawa weather in October.
September and November present contrasting weather conditions. In September, temperatures can range from a mild 9°C (49°F) at night to a warm 32°C (91°F) during the day, with an average of 20°C (69°F). This month sees considerable rainfall, accumulating to 163 mm (6.4 in) over 17 days, coupled with high humidity at 84%. In stark contrast, November experiences much cooler temperatures, with minimums dropping to -3°C (28°F) and an average of 9°C (48°F). The maximum temperature in November reaches only 21°C (70°F), and the month is much drier, with only 51 mm (2.0 in) of precipitation over just 6 days, alongside a lower humidity of 77%. For more detailed insights into November's climate, check out Shirakawa weather in November.
September and December exhibit starkly contrasting weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (91°F), with an average of 20°C (69°F). This month also sees substantial rainfall, totaling 163 mm (6.4 in) over 17 days, accompanied by high humidity at 84%. In contrast, December experiences much colder temperatures, with minimums dropping to -5°C (24°F) and maximums reaching only 17°C (63°F), averaging around 3°C (38°F). Precipitation declines significantly to 55 mm (2.2 in) over just 9 days, and the humidity is slightly lower at 77%. For more specific details about Shirakawa's December weather, you can visit Shirakawa weather in December.
As September arrives in Shirakawa, the weather begins to shift into a more temperate phase, offering a pleasant contrast to the sweltering summer months. Daytime temperatures peak around 32°C (91°F), but the average cools significantly to a comfortable 20°C (69°F), making it ideal for outdoor activities. Meanwhile, the increased rainfall, totaling 163 mm over 17 days, adds to the area's lush scenery, though the high humidity at 84% can make it feel muggy at times. This blend of warmth and moisture signifies a transition into autumn, inviting visitors to experience the region’s vibrant fall foliage. For a deeper dive into Shirakawa's climate patterns, check out Shirakawa Climate.