Last updated: August 21, 2025
In Nanao, Japan, September experiences a warm climate characterized by an average temperature of 24°C (76°F), with highs reaching a scorching 38°C (100°F). The month is marked by high humidity levels at 84%, creating a muggy atmosphere. Rainfall is prominent, as the city records 222 mm (8.7 in) of precipitation over 15 days, making it one of the wetter months. This combination of warmth and moisture sets the stage for a lush, vibrant landscape, typical of early autumn in this coastal region.
In September, Nanao, Japan, experiences a notable transition as the summer warmth begins to wane. With minimum temperatures around 15°C (59°F) and an average of 24°C (76°F), the month maintains a pleasant feel before autumn fully sets in. The maximum temperature can soar to an impressive 38°C (100°F), reflecting the lingering summer heat. This month marks a shift in the climate narrative, as it bridges the intense summer heat of July and August with the cooler, crisper air that October brings. As the days grow shorter, visitors can enjoy the balmy yet temperate conditions, perfect for exploring Nanao's stunning landscapes and cultural offerings.
In September, Nanao experiences a notable amount of rain with 222 mm (approximately 8.7 inches) of precipitation, making it one of the wetter months of the year. This significant rainfall occurs over 15 days, reflecting a pattern of steady precipitation typical of late summer transitions. Notably, this month is just below August's peak of 228 mm (9.0 in), highlighting a lingering influence of the typhoon season. While the intensity of rainfall may taper off in the subsequent months, September stands as a reminder of the region's rich moisture, contributing to the lush landscapes that define Nanao. Overall, the trend illustrates that as summer wanes, the city remains graced with ample rain, setting the stage for the transforming autumn scenery.
September in Nanao, Japan, experiences a noticeable decline in humidity compared to the sweltering summer months. With humidity levels at 84%, it marks a transition from the peak of 93% in July and 92% in August. This gradual decrease hints at the onset of autumn, offering a breath of fresh air as the sweltering heat gives way to cooler, crisper days. Despite this dip, September’s humidity remains higher than the winter months, such as January's 80%, creating a unique atmospheric blend as the city edges towards the refreshing fall season. The varying humidity patterns throughout the year highlight Nanao's dynamic climate, where late summer gradually softens into autumn.
As September unfolds in Nanao, Japan, residents and visitors can expect a UV Index of 9, indicating a very high level of UV exposure and a burn time of only 15 minutes. This drop from the extreme conditions experienced during the peak months of June through August suggests that while the summer's harsh glare is waning, caution is still essential. Compared to earlier months like April and May, where the index also reached 10, September offers a slight relief, yet it remains imperative to protect your skin. With such levels persisting, it’s wise to stay informed about UV radiation and take necessary precautions. For more information on UV levels throughout the year, check out the detailed Nanao UV Index.
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In Nanao, Japan, September is a delightful month characterized by a substantial 257 hours of sunshine. This marks a slight decline from the vibrant summer months of July and August, which basked in over 298 and 311 hours respectively. However, September's sunshine still stands comfortably above the earlier part of the year, highlighting a transition towards autumn without losing its appeal. The overall trend reveals a gradual increase in sunlight hours from January through May, peaking in the summer, before tapering off in October and further into winter. With its warm rays, September serves as a beautiful bridge between the summer's exuberance and the gentler tones of autumn, making it a noteworthy time to enjoy the natural beauty of Nanao.
In Nanao, Japan, September offers a 35% chance of sunny weather, positioning it in the mid-range of the yearly forecast. This month follows a summer of fluctuating sunshine, where July and August, typically bright, dip significantly to 40% and 24%, respectively. The likelihood of sunny days gradually rebounds in October at 45%, suggesting that the change of seasons brings clearer skies. Overall, while September may not boast the highest chances for sun, it serves as a gentle transition towards the brighter days of autumn, making it a pleasant time to enjoy the serene coastal landscapes of Nanao.
In Nanao, Japan, the changing seasons bring a striking rhythm to daylight duration. September marks a gentle transition as daylight wanes to 12 hours, neatly bridging the long, sunlit days of summer—where June, July, and August bask in a uniform 14 hours—and the crisp fall atmosphere that follows. This gradual decrease hints at the impending shifts of autumn, with daylight decreasing further to 11 hours in October. The entire year showcases a serene ebb and flow, beginning at 9 hours in January and rising to a peak of 14 hours in mid-summer, before settling back into shorter days as the year draws to a close. This natural cycle not only reflects the beauty of Nanao's environment but also invites residents and visitors alike to appreciate the subtle changes each month brings.
In Nanao, Japan, the September winds whisper softly, averaging around 2.6 m/s (6 mph), marking a gentle transition into the autumn months. This slight uptick from the summer lull, where winds hovered below 2.5 m/s, indicates the onset of change as the seasons shift. The breezy autumn air starts to replace the stagnant summer heat, offering a refreshing respite. As October approaches, wind speeds begin to climb again to 2.9 m/s, reflecting a steady increase that leads into the more blustery months of late fall. Overall, September serves as a serene bridge between the sultry stillness of summer and the invigorating winds of autumn, captivating those who enjoy the subtle shifts of nature in this picturesque locale.
Weather in Nanao varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nanao, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather patterns. In September, temperatures range from a mild 15°C (59°F) at night to a scorching 38°C (100°F) during the day, with an average of 24°C (76°F). This month experiences significant rainfall, accumulating 222 mm (8.7 in) over 15 days, and the humidity is notably high at 84%.
In contrast, January features much colder temperatures, with a minimum of -4°C (24°F) and a maximum of 16°C (60°F), leading to an average temperature of just 5°C (41°F). Precipitation is less intense in January, totaling 115 mm (4.5 in) spread over 19 days, while humidity remains relatively low at 80%. For more details on the weather conditions during this month, you can check Nanao weather in January.
September and February present strikingly different weather patterns. In September, temperatures range from a minimum of 15°C (59°F) to a scorching maximum of 38°C (100°F), with an average of 24°C (76°F). The month is characterized by high humidity at 84% and substantial rainfall, with 222 mm (8.7 in) spread over 15 rainy days. In contrast, February experiences much cooler temperatures, with a minimum of -3°C (26°F), an average of 5°C (41°F), and a maximum of 18°C (65°F). While February is less rainy, with 106 mm (4.2 in) over 16 days, its humidity is slightly lower at 78%. For further details on February's weather, check Nanao weather in February.
In September, the weather is significantly warmer and more humid, with average temperatures around 24°C (76°F) and maximums reaching up to 38°C (100°F). This month also experiences considerable rainfall, with 222 mm (8.7 in) over about 15 days, resulting in a high humidity level of 84%. In contrast, March brings cooler temperatures, with an average of 9°C (48°F) and highs of 22°C (72°F). The precipitation is lower at 126 mm (5.0 in), also distributed over 15 days, and the humidity is slightly reduced at 76%. For a detailed look at March weather conditions, you can check Nanao weather in March.
September and April exhibit contrasting weather patterns, with September showcasing significantly warmer temperatures and higher humidity levels. In September, average temperatures reach a pleasant 24°C (76°F), climbing to a sweltering maximum of 38°C (100°F), while experiencing considerable rainfall of 222 mm (8.7 in) over 15 days. In stark contrast, April offers a much cooler ambiance, with average temperatures around 13°C (55°F) and a maximum of 27°C (82°F). April's precipitation, although present, is lower at 144 mm (5.7 in) over 13 days, and humidity is slightly lower at 77%. For more details on April weather, you can check Nanao weather in April.
Comparing the weather in September and May reveals distinct seasonal contrasts. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 38°C (100°F), averaging around 24°C (76°F). This month also sees considerable rainfall, with 222 mm (8.7 in) expected over 15 days, and humidity levels remain high at 84%. In contrast, May experiences cooler temperatures, with a minimum of 7°C (44°F) and a maximum of 30°C (87°F), averaging 18°C (66°F). Rainfall is less frequent in May, totaling 103 mm (4.0 in) over 12 days, with humidity slightly lower at 85%. For a more detailed look at May weather specifics, you can visit Nanao weather in May.
September generally presents warmer temperatures compared to June, with average highs reaching 38°C (100°F) as opposed to June's maximum of 32°C (90°F). However, September also brings significantly more rainfall, with 222 mm (8.7 in) falling over 15 days, while June has only 141 mm (5.6 in) over 11 days. Humidity levels are high in both months, but slightly lower in September at 84% compared to June's 89%. For a closer look at June's weather specifics, check out Nanao weather in June.
In comparing the weather between September and July, September experiences notably cooler average temperatures, with a range from a minimum of 15°C (59°F) to an average of 24°C (76°F), while July sees higher temperatures, starting at a minimum of 21°C (69°F) and averaging 27°C (80°F). July also tends to be more humid, reaching 93% compared to September's 84%. While both months are characterized by significant rainfall, July records a higher total precipitation at 295 mm (11.6 in) over 19 days, compared to September's 222 mm (8.7 in) over 15 days. For a more detailed look at July weather in this region, you can visit Nanao weather in July.
September weather shows a slight cooling trend compared to August, with minimum temperatures dropping from 20°C (69°F) in August to 15°C (59°F) in September. The average temperature also decreases from 29°C (84°F) in August to 24°C (76°F) in September, while the maximum temperature remains fairly consistent, peaking at 39°C (103°F) in August and slightly lower at 38°C (100°F) in September. Precipitation levels are comparable, with September receiving 222 mm (8.7 in) over 15 days, just slightly less than August’s 228 mm (9.0 in) over 16 days. Humidity is also notably high in both months, though September sees a slight decrease to 84% from August's 92%. For more details about the weather conditions in August, you can refer to Nanao weather in August.
In September, the weather is characterized by warmer temperatures, with minimums around 15°C (59°F) and maximums reaching up to 38°C (100°F), accompanied by high humidity at 84%. The month also sees considerable rainfall, with 222 mm (8.7 in) of precipitation spread over 15 days. In contrast, October experiences cooler temperatures, with a minimum of 10°C (51°F) and a maximum of 32°C (89°F), and slightly less rainfall at 160 mm (6.3 in) over 13 days. The humidity decreases to 81%, reflecting the transition to autumn. For a more detailed look at October weather, you can check Nanao weather in October.
September and November present a striking contrast in weather patterns. In September, temperatures range from a minimum of 15°C (59°F) to a scorching maximum of 38°C (100°F), with an average of 24°C (76°F), making it considerably warmer. This month also experiences higher humidity at 84% and substantial rainfall, totaling 222 mm (8.7 in) over 15 days. In contrast, November brings much cooler temperatures, with a minimum of 3°C (37°F) and an average of 13°C (55°F), peaking at 26°C (78°F). Precipitation decreases to 107 mm (4.2 in) across 13 days, and humidity slightly lowers to 77%. For more specific information on November weather, you can check Nanao weather in November.
In September, the weather is typically warm with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 38°C (100°F) and an average of 24°C (76°F). This month also experiences significant rainfall, totaling 222 mm (8.7 in) over 15 days, accompanied by high humidity levels of 84%. In contrast, December presents a much cooler climate, with temperatures varying from a chilly -2°C (28°F) at night to a pleasant maximum of 21°C (71°F), and an average of 7°C (45°F). While the precipitation for December is lower at 153 mm (6.0 in), it occurs over a greater number of days, totaling 22. The humidity is also somewhat lower at 79%. For more detailed information on December weather, you can check Nanao weather in December.
As September unfolds in Nanao, the weather transitions significantly, offering a unique blend of warmth and moisture that sets it apart from the scorching summer months. While maximum temperatures can reach a sweltering 38°C, the average drops to a more comfortable 24°C, creating a pleasant atmosphere for outdoor activities. The increase in rainfall, with about 222 mm over 15 days, marks a definitive shift towards a wetter climate, highlighting the arrival of autumn. This month also dials up the humidity to around 84%, which can be quite different from the dryer conditions experienced earlier in the summer. For those looking to better understand these climatic changes, detailed insights can be found at Nanao Climate.