Last updated: August 21, 2025
September in Naha, Japan, is characterized by warm temperatures and considerable humidity, making it an ideal month for beach lovers and tropical enthusiasts. The maximum temperature often reaches a pleasant 30°C (87°F), while the average hovers around 28°C (82°F), ensuring comfortable conditions for outdoor activities. However, with a significant minimum temperature of 24°C (75°F), evenings remain inviting. Visitors should be prepared for some rain, as the month accumulates an average of 253 mm (10.0 in) of precipitation over about 19 days, contributing to an overall humidity level of 82%. This combination creates a lush and vibrant atmosphere, perfect for experiencing the unique beauty of Okinawa’s landscapes and culture.
As September arrives in Naha, Japan, the temperatures begin to reflect a warm transition from summer to early autumn. With a minimum temperature of 24°C (75°F), the month starts off noticeably warmer than earlier in the year, signaling the tail end of the hot season. The average temperature settles around 28°C (82°F), maintaining the summer's lingering warmth, while the maximum can reach 30°C (87°F), providing ample opportunity for sun-seekers to enjoy beach days and outdoor activities. Compared to the previous months of July and August, September offers a slight dip, yet it's clear that the tropical climate reigns supreme, ensuring that residents and visitors alike can relish in balmy days and pleasant evenings.
September marks a significant peak in precipitation for Naha, Japan, with a striking 253 mm (10.0 in) of rainfall accumulated over 19 days. This solidifies September as one of the wetter months of the year, following the already notable rainy season in June and July, which experience heavy downpours of 302 mm (11.9 in) and 192 mm (7.6 in)** respectively. The upward trend in precipitation continues into September, showcasing the region’s transition from summer heat to the more temperate fall climate. Despite the rainfall, the lush and vibrant scenery of Naha flourishes, making it a beautiful time to experience the island’s natural beauty, albeit with an umbrella in hand!
In Naha, Japan, the month of September sees humidity levels averaging around 82%, maintaining a consistent trend observed since May. As the summer months transition towards fall, daily moisture remains high, though slightly lower than the peak levels of June and July, both at 86%. This lingering humidity, combined with the warm temperatures typical of the region, creates a climate that can feel tropical and vibrant. Following September, the humidity begins a gradual decline heading into the cooler autumn months, dropping to 80% by October and continuing to ease further into winter. Overall, this pattern highlights Naha's humid subtropical climate, characterized by warm, moist summers and gentle transitions into drier seasons.
In September, Naha, Japan experiences a highly intense UV Index of 12, classifying it within the extreme exposure category. With a rapid burn time of just 10 minutes, it’s crucial for residents and visitors alike to remain vigilant about sun protection. This trend of consistently high UV levels, peaking at 13 from May to August, highlights a seasonally maintained intensity before slightly tapering off in October. As we transition from the sweltering summer months, September still demands a proactive approach to UV exposure. For more detailed insights into UV index levels throughout the year, you can visit Naha UV Index.
UV Risk Categories
September in Naha, Japan, typically bathes the city in sunshine, contributing to an impressive 295 hours of bright days. This cheerful month follows the peak brightness of August, which enjoys a dazzling 319 hours of sunlight, making it one of the sunniest months of the year. As summer transitions into fall, September still boasts significant sunshine, albeit slightly less than its predecessor. The gradual decline in sunlight hours marks the shift towards autumn, yet September remains vibrant, retaining a strong luminosity that invites exploration and enjoyment of outdoor attractions. The sunshine trend witnessed from May to September highlights the allure of warm, sun-soaked adventures that Naha has to offer, encouraging both locals and travelers to revel in the beauty of this enchanting destination.
In September, Naha, Japan, enjoys a significant increase in the probability of sunny weather, with a notable 59% chance of sunshine. This marks a sharp rise from the rather dismal 9% in June, indicating a transition into sunnier days and a more favorable climate as summer winds down. Following the sunny trend, October continues to provide a solid 51% likelihood of sunny skies, while November sees a slight dip to 44%. Overall, September stands out as a prime time for those looking to soak up the sun, suggesting that visitors can expect more enjoyable outdoor experiences as the weather begins to shift towards the latter months of the year.
In Naha, Japan, the daylight duration exhibits a gradual yet notable rhythm throughout the year. Starting with 10 hours in January, the days steadily lengthen, peaking at 13 hours during the summer months of May through August. As we transition into September, daylight begins to taper off slightly, settling at 12 hours—a gentle reminder that autumn is on the horizon. This decrease continues into October, with daylight shrinking back to 11 hours, before retreating further to 10 hours in the winter months of November and December. Overall, the variation in daylight not only marks the changing seasons but also reflects the vibrant cycles of life that characterize this beautiful region.
As September rolls into Naha, Japan, the average wind speed dips to a gentle 5.4 m/s (12 mph), marking the calmest breezes of the year. This subtle shift from the previous months resonates with the gradual transition into autumn, as the lively summer winds recede in favor of a more tranquil atmosphere. While the early months of the year, particularly January and April, welcome sharper gusts that peak at 8.2 m/s (18 mph) and 7.6 m/s (17 mph) respectively, September offers a serene respite, inviting tranquility and a reflective mood. As October approaches, Naha experiences a resurgence in wind speed, jumping back to 7.9 m/s (18 mph), hinting at a dynamic shift that foreshadows the invigorating breezes of fall. This notable ebb and flow in wind patterns not only defines the seasonal character of Naha but also sets the stage for its vibrant local culture and outdoor activities.
Weather in Naha varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Naha, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is notably warm and humid, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 30°C (87°F), and an average of 28°C (82°F). The month experiences significant rainfall, with 253 mm (10.0 in) of precipitation over 19 days, leading to a high humidity level of 82%. In contrast, January brings much cooler temperatures, with a minimum of 12°C (54°F) and a maximum of 24°C (75°F), averaging around 19°C (66°F). The precipitation decreases to 91 mm (3.6 in) over 11 days, and humidity levels drop to 71%. For a closer look at January weather specifics, you can check Naha weather in January.
In September, the weather is characterized by warm temperatures, with a minimum of 24°C (75°F) and an average high reaching 30°C (87°F). The month experiences significant rainfall, totaling 253 mm (10.0 in) over 19 days, and boasts high humidity levels around 82%. In contrast, February presents a much cooler climate, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 24°C (76°F), and an average of 19°C (66°F). Precipitation is considerably lower in February at 97 mm (3.8 in) over 12 days, alongside reduced humidity at 71%. For a more detailed perspective on February weather, you can check Naha weather in February.
In September, the weather is significantly warmer and more humid compared to March, with average temperatures around 28°C (82°F) and humidity levels reaching 82%. The month experiences considerable rainfall, totaling 253 mm (10.0 in) over 19 days, making it one of the wetter months of the year. Conversely, March offers a milder climate, with average temperatures of 20°C (68°F) and lower humidity at 76%. Precipitation in March is also lighter, at 107 mm (4.2 in) over just 11 days. For more detailed insights about the weather during this month, you can check out Naha weather in March.
September and April present quite different weather patterns. In September, temperatures are notably warmer, with a minimum of 24°C (75°F) and an average of 28°C (82°F), reaching a maximum of 30°C (87°F). In contrast, April enjoys milder conditions, with temperatures ranging from a minimum of 15°C (60°F) to an average of 21°C (71°F), peaking at 26°C (79°F).
Precipitation also varies significantly; September receives a substantial 253 mm (10.0 in) spread over 19 days, while April sees much less rainfall at 137 mm (5.4 in) across 11 days. Interestingly, both months share the same humidity level of 82%, but the overall climate feels considerably more humid and oppressive in September. For a closer look at the conditions in April, you can visit Naha weather in April.
When comparing the weather conditions of September and May, September tends to be warmer and more humid. With average temperatures reaching 28°C (82°F) and highs of 30°C (87°F), it offers a notable increase compared to May's average of 24°C (76°F) and maximum of 27°C (82°F). Additionally, September experiences higher precipitation, with 253 mm (10.0 in) of rainfall spread over 19 days, while May sees 208 mm (8.2 in) over just 12 days. The humidity levels are also slightly elevated in September at 82%, compared to 84% in May. For a more detailed look, you can check out Naha weather in May.
In comparing the weather between September and June, September tends to be slightly warmer, with average temperatures reaching 28°C (82°F) compared to June's average of 26°C (80°F). However, June experiences a higher level of rainfall, accumulating 302 mm (11.9 in) compared to September's 253 mm (10.0 in). Both months feature a similar number of rainy days, with 19 days of precipitation. Additionally, humidity is marginally lower in September at 82% compared to June's 86%. For more detailed insights into June's climate, you can visit Naha weather in June.
In comparing the weather of September and July, both months exhibit high temperatures with averages around 28°C (82°F) and maximums reaching up to 30°C (87°F). However, September tends to be slightly cooler with a minimum temperature of 24°C (75°F) compared to July's minimum of 26°C (78°F). Notably, September experiences significantly higher precipitation, totaling 253 mm (10.0 in) over 19 days, while July sees less rainfall at 192 mm (7.6 in) over 13 days. The humidity levels are also high in both months, with July being a bit more humid at 86% compared to September's 82%. For more detailed weather information specific to July, you can check this link: Naha weather in July.
In comparing the weather of September to August, both months share similar temperature ranges, with average highs of 30°C (87°F) and lows averaging around 24°C (75°F) in September and 26°C (78°F) in August. However, September experiences more rainfall, with 253 mm (10.0 in) of precipitation occurring over 19 days, compared to 205 mm (8.1 in) over 17 days in August. Interestingly, humidity levels remain constant at 82% for both months, creating a consistently tropical environment. For more detailed information on August weather specifically in Naha, you can check out Naha weather in August.
September typically experiences warmer temperatures compared to October, with minimums around 24°C (75°F) and an average of 28°C (82°F) in September, versus a minimum of 21°C (71°F) and an average of 26°C (79°F) in October. Additionally, September is marked by higher precipitation, averaging 253 mm (10.0 in) over 19 days, while October sees considerably less rain at 160 mm (6.3 in) over just 13 days. Humidity remains fairly consistent, with September at 82% and October slightly lower at 80%. For a detailed look at what to expect, check out Naha weather in October.
September and November weather show a noticeable transition in temperature and precipitation. In September, the minimum temperature averages around 24°C (75°F), peaking at 30°C (87°F) with higher humidity levels at 82%, creating a warm and somewhat oppressive atmosphere. Additionally, September experiences significant rainfall, with precipitation totaling 253 mm (10.0 in) over 19 days. In contrast, November brings cooler temperatures, with a minimum of 19°C (67°F) and a maximum of 27°C (80°F). The overall average drops to 23°C (74°F), accompanied by a decrease in rainfall to 103 mm (4.1 in) over just 11 days. Humidity also declines slightly to 79%, contributing to a more comfortable environment. For more detailed insights, you can check Naha weather in November.
In September, the weather is notably warmer, with temperatures ranging from a minimum of 24°C (75°F) to an average of 28°C (82°F) and reaching a maximum of 30°C (87°F). This month experiences significant rainfall, totaling 253 mm (10.0 in) over 19 days, coupled with high humidity levels at 82%. In contrast, December brings a cooler climate, with temperatures dropping to a minimum of 14°C (58°F) and averaging around 20°C (69°F), peaking at 25°C (78°F). Precipitation is less intense in December, at 188 mm (7.4 in) over 16 days, and humidity also decreases to 75%. For more detailed information, check out Naha weather in December.
As September rolls in, Naha experiences a transition in its weather, marked by warm temperatures and significant rainfall. While daily highs still reach pleasant levels, the humidity peaks, making the air feel more tropical compared to earlier summer months. The frequent rain, with nearly two-thirds of the month experiencing precipitation, can catch visitors off guard, creating a lush landscape that contrasts with the drier heat of July and August. This month serves as a bridge to the cooler, more temperate months ahead, making it an interesting time to visit for those who appreciate a blend of summer warmth and refreshing showers. For a deeper dive into Naha's weather patterns, check out Naha Climate.