Last updated: August 21, 2025
September in Nichinan, Japan, showcases a warm climate characterized by a maximum temperature of 32°C (89°F) and a comfortable average of 25°C (78°F), while the minimum dips to a pleasant 18°C (66°F). This month experiences significant precipitation, with a total of 302 mm (11.9 in) spread across approximately 20 days, contributing to an humidity level of around 80%. Visitors can anticipate a mix of sunshine and showers, making it an ideal time to explore the lush landscapes and vibrant culture of this scenic coastal town.
In September, temperatures in Nichinan, Japan, begin to showcase the transition from the sweltering summer to the cooler autumn months. With a minimum of 18°C (66°F) and an average temperature reaching 25°C (78°F), the weather remains pleasantly warm, making it ideal for outdoor activities and exploring the region's stunning natural beauty. The maximum temperature can climb to 32°C (89°F), hinting at the lingering summer heat before the cooler October days set in. This month serves as a bridge between the extremes, with a gradual cooling trend evident as the average temperatures start to drop from the sultry heights of the summer months. As daylight hours begin to shorten, the balance of warmth and crispness in the air creates a delightful atmosphere for both locals and visitors alike.
September in Nichinan, Japan, is characterized by significant rainfall, with an impressive 302 mm (11.9 in) of precipitation spread over 20 days. This month marks a peak in the wet season, drawing closer to the heavier rains seen in June, which averages 397 mm (15.6 in), and the high humidity typical of summer months. Notably, September experiences a noticeable increase in precipitation compared to the preceding months of July and August, suggesting an uptick in storm activity as summer transitions to autumn. The frequent rainfall not only supports lush vegetation but also sets the stage for vibrant landscapes as the season begins to change. As the year progresses into autumn, these trends of substantial rainfall continue to shape both the environment and lifestyle in this picturesque coastal region.
In September, Nichinan experiences a notable transition in humidity, with levels averaging around 80%. This month marks a slight decrease from the peak of 90% seen in July and the 85% in August, yet it remains higher than the earlier months of the year. As summer wanes, the humidity retains a warm, enveloping quality, indicative of the region's coastal climate. The gradual decline suggests a shift towards the drier conditions of the fall months ahead, while still capturing the lingering warmth of late summer. Overall, September's humidity reflects a blend of seasonal change, maintaining a balance that characterizes Nichinan's vibrant atmosphere.
As September rolls around in Nichinan, Japan, the UV Index remains at a high 11, reflecting an extreme exposure category that necessitates caution. Though slightly lower than the scorching heights of August’s 13, the sun continues to dominate, allowing for just 10 minutes of safe sun exposure before the risk of overexposure increases. This trend marks the tail end of a summer where UV levels surged, peaking in May through August, consistently ranking as extreme. Looking ahead, October will see a dip to a very high UV Index of 8, indicating a gradual shift towards safer sun conditions. For essential tips on UV safety and more, check out the detailed guide at Nichinan UV Index.
UV Risk Categories
September in Nichinan, Japan, enjoys a delightful blend of warmth and sunlight, boasting an impressive 260 hours of sunshine. This month follows the sunniest August, which recorded a peak of 306 hours, yet maintains a robust brightness as the summer begins to gracefully transition into autumn. The trend reveals a steady increase in sunshine from January's 198 hours to September's highs, with a noticeable peak in late summer. As the seasons change, September shines as a reminder of summer's lingering embrace, encouraging outdoor adventures and the vibrant beauty of nature. With the sun still casting its golden rays, September perfectly captures the essence of early autumn in this picturesque coastal town.
September in Nichinan, Japan, sees a notable return of sunshine, with a 38% chance of sunny weather. This marks an increase compared to the peak summer months of July and August, which experience lower probabilities of clear skies at 21% and 30%, respectively. As the season transitions towards autumn, the likelihood of sun begins to rise again, aligning more closely with the trends seen in the months before winter, like October (55%) and November (54%). While September may not boast the highest chances of sunny days, it certainly positions itself as a bridge between the sultry summer and the subsequent autumn brightness, making it a pleasant time for outdoor activities.
In Nichinan, Japan, the month of September ushers in a gradual transition as daylight begins to wane, offering approximately 12 hours of sunshine each day. This marks a slight decline from the sun-soaked days of summer, where June peaked at a robust 14 hours. Following the sun's summer peak, August maintains 13 hours of daylight, but by September, the daylight hours diminish, hinting at the impending autumn. As the year progresses, October continues this trend with 11 hours of daylight, reinforcing the rhythmic ebb and flow of seasons in Nichinan. Overall, this pattern illustrates a vibrant journey through the year, characterized by increasing daylight in spring and summer, followed by a gradual retreat into the cozy embrace of shorter days as autumn arrives.
In Nichinan, Japan, the month of September brings a gentle breeze, with an average wind speed of 3.7 m/s (8 mph), marking a slight dip from the summer months. This trend continues the gradual decline in wind speed observed since July, where it peaked at 4.3 m/s (10 mph). The winds are softer then, perhaps echoing the transition into autumn. Following September, wind speeds remain relatively stable as the year draws to a close, suggesting a calm serenity in the coastal atmosphere of Nichinan. Overall, September's mild winds invite leisurely strolls along the coastline, offering a soothing backdrop for the beautiful changing scenery.
Weather in Nichinan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nichinan, focusing on differences in temperature, rainfall, humidity, and UV levels.
September features significantly warmer weather, with average temperatures ranging from a minimum of 18°C (66°F) to a maximum of 32°C (89°F) and a high level of humidity at 80%. The month is also quite wet, experiencing 302 mm (11.9 in) of precipitation over approximately 20 days. In contrast, January brings a stark change with cooler temperatures, where the average ranges from -1°C (31°F) to 20°C (69°F). January also has a much drier climate, receiving only 60 mm (2.4 in) of rainfall over around 5 days and maintaining a lower humidity level of 72%. For more details on January weather, you can visit Nichinan weather in January.
September and February present striking contrasts in weather. In September, temperatures range from a minimum of 18°C (66°F) to a maximum of 32°C (89°F), with an average of 25°C (78°F), highlighting the warmth of early autumn. This month is also characterized by high humidity at 80% and significant rainfall, totaling 302 mm (11.9 in) over about 20 days. In contrast, February is much cooler, with temperatures dipping to a minimum of 0°C (32°F) and peaking at 21°C (70°F), averaging just 10°C (50°F). The amount of precipitation is lower, at 114 mm (4.5 in) over 10 days, and humidity is also reduced to 68%. For more details, you can check Nichinan weather in February.
In comparing the weather of September and March, a stark contrast emerges. September boasts warmer temperatures, with a minimum of 18°C (66°F) and an average of 25°C (78°F), peaking at a scorching 32°C (89°F). In contrast, March starts chilly, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 24°C (75°F), resulting in a much cooler average of 14°C (57°F). Additionally, September is heavily influenced by rainfall, with 302 mm (11.9 in) of precipitation over 20 days, while March sees significantly less, with 189 mm (7.4 in) of rain over just 13 days. Humidity is also higher in September at 80%, compared to March's 72%. For more detailed insights about the weather in March, you can check out Nichinan weather in March.
September and April present contrasting weather patterns, reflecting the transition from summer's warmth to the coolness of spring. In September, temperatures range from a mild 18°C (66°F) to a sweltering 32°C (89°F), with an average of 25°C (78°F). This month is also marked by significant rainfall, receiving about 302 mm (11.9 in) over approximately 20 days, accompanied by high humidity levels around 80%. In contrast, April boasts cooler conditions, with temperatures stretching from a minimum of 6°C (44°F) to a maximum of 26°C (78°F) and an average of 17°C (63°F). Rainfall is also less frequent, totaling 144 mm (5.7 in) over about 10 days, while humidity remains relatively stable at 79%. For more detailed information about April weather, you can visit Nichinan weather in April.
September and May present contrasting weather patterns. September typically boasts warmer temperatures, with averages around 25°C (78°F) and maximums reaching 32°C (89°F), while May is cooler, averaging 20°C (69°F) and peaking at 29°C (84°F). However, September sees a significantly higher level of precipitation, totaling 302 mm (11.9 in) over 20 days compared to May's 242 mm (9.5 in) across just 14 days. Humidity levels are slightly higher in September at 80%, compared to 83% in May, making both months feel quite humid but with September feeling more muggy overall. For more specific insights, check Nichinan weather in May.
When comparing the weather in September and June, one can observe some notable differences. September typically has slightly higher temperatures, with averages reaching 25°C (78°F) compared to June's average of 23°C (74°F). However, June sees a bit more precipitation, with 397 mm (15.6 in) of rainfall over 19 days, compared to September's 302 mm (11.9 in) over 20 days. Additionally, the humidity is higher in June at 86%, whereas September's humidity levels hover around 80%. For more specific details about the weather in June, you can check Nichinan weather in June.
In comparing the weather of September and July, September tends to offer slightly cooler temperatures, with averages around 25°C (78°F), compared to July's warmer average of 27°C (80°F). July also has higher maximum temperatures, peaking at 33°C (91°F) versus September's maximum of 32°C (89°F). Both months experience significant rainfall, with July receiving about 329 mm (12.9 in) over 21 days, while September sees 302 mm (11.9 in) spread across 20 days. Humidity levels are notably high in both months, with July being more humid at 90% compared to September's 80%. For more specifics on July's climate, you can check Nichinan weather in July.
In comparing the weather between September and August, September generally experiences slightly cooler temperatures, with a minimum of 18°C (66°F) compared to August's warmer minimum of 23°C (74°F). The average temperature in September is also lower at 25°C (78°F) versus August’s 28°C (82°F), and while September sees a maximum of 32°C (89°F), this is slightly less than August's peak of 34°C (93°F). Precipitation is notably higher in September, with 302 mm (11.9 in) spread over 20 days, compared to 238 mm (9.4 in) over 18 days in August. Both months have high humidity levels, with September at 80% and August at 85%. For more detailed insights into August weather, you can check Nichinan weather in August.
September and October present a notable shift in weather conditions. In September, temperatures range from a minimum of 18°C (66°F) to an average of 25°C (78°F), peaking at 32°C (89°F). This month is characterized by high precipitation levels, with 302 mm (11.9 in) falling over approximately 20 days and humidity averaging 80%.
In contrast, October sees a decrease in temperature, with minimums dropping to 12°C (53°F) and an average of 21°C (71°F), though the maximum still reaches 30°C (87°F). Precipitation is reduced to 196 mm (7.7 in) across about 12 days, along with a slight decrease in humidity to 78%. For more specific details about the weather during October, visit Nichinan weather in October.
September features warm temperatures, with a minimum of 18°C (66°F) and an average of 25°C (78°F), peaking at a maximum of 32°C (89°F). It is also a notably wet month, receiving 302 mm (11.9 in) of rainfall over 20 days, coupled with high humidity at 80%. In contrast, November sees a significant drop in temperatures, with a minimum of 6°C (43°F) and an average of 16°C (62°F), reaching a maximum of 25°C (78°F). Precipitation decreases considerably to 103 mm (4.1 in) over just 8 days, and humidity slightly lowers to 76%. For more detailed information, you can check Nichinan weather in November.
In September, the weather is characterized by warm temperatures, with a minimum of 18°C (66°F) and an average of 25°C (78°F), reaching a maximum of 32°C (89°F). The month is quite rainy, experiencing 302 mm (11.9 in) of precipitation over 20 days, contributing to a high humidity level of 80%. In contrast, December brings a significant drop in temperatures, with minimums around 1°C (33°F) and an average of 11°C (52°F). The maximum temperature in December reaches 22°C (73°F), but the overall climate is much drier, with only 85 mm (3.4 in) of precipitation over 7 days and a lesser humidity of 74%. For a detailed look at December weather in Nichinan, you can visit Nichinan weather in December.
As summer gives way to autumn, September in Nichinan is characterized by a notable shift in weather patterns. With an average temperature around 25°C (78°F), it offers a respite from the heat of the preceding months. However, this period also brings increased precipitation; rain falls on about 20 days, contributing to the region's rich humidity levels of 80%. Compared to the relatively dry and scorching summer, September's weather feels more refreshing yet can be unsettling with its dampness. For a more detailed overview of how Nichinan's weather evolves throughout the year, check out Nichinan Climate.