Last updated: August 21, 2025
In September, Okinawa, Japan experiences warm temperatures with a maximum of 30°C (87°F) and an average of 28°C (82°F), while nights are comfortably mild, dipping to a minimum of 24°C (75°F). This tropical paradise sees significant precipitation, totaling 253 mm (10.0 in) over 19 rainy days, contributing to its lush green landscapes. With humidity levels around 82%, visitors should prepare for both warmth and moisture, making it essential to embrace the island's vibrant culture and stunning natural beauty amidst the summer's lingering embrace.
In September, Okinawa basks in a warm tropical climate, with temperatures gently transitioning towards the autumn months. The minimum temperature hovers around a comfortable 24°C (75°F), while the average climbs to a balmy 28°C (82°F), perfect for enjoying the island's stunning beaches. Days can reach up to 30°C (87°F), creating a vibrant atmosphere ideal for outdoor adventures and sightseeing. Compared to the preceding summer months, September marks a slight decrease in both minimum and average temperatures, providing a pleasant yet still summery experience. As the season shifts, the blend of warmth and emerging breezes makes it an inviting time to explore Okinawa’s unique culture and natural beauty.
In September, Okinawa experiences a notable surge in precipitation, with an average of 253 mm (10.0 in), making it one of the rainiest months of the year. This uptick can be attributed to the peak of the typhoon season, which often brings intense downpours. The month sees an increase in rainy days, totaling 19, which aligns with the trend of increased precipitation observed from mid-year onwards. Prior months like June and August also recorded high rainfall, but September stands out with its substantial volume, indicating a significant climatic shift as the region transitions from summer to autumn. The pattern of precipitation not only showcases Okinawa's vibrant ecosystem but also influences local activities, as residents and visitors alike must navigate the challenges posed by the frequent showers.
As summer bids farewell in Okinawa, September's humidity settles at a comfortable 82%, marking a slight decrease from the peak summer months of June and July, which both hover around 86%. This transitional month showcases a trend of gradually declining humidity, with levels starting to taper off from the sweltering summer highs. As the region edges into fall, residents and visitors alike may start to feel the relief, yet the air remains noticeably moist. Historically, September carries an echo of the preceding months, maintaining a humidity that's slightly above the year-round average, illustrating Okinawa's distinctive tropical climate. The gentle drop continues into October, promising a refreshing change as autumn approaches.
As September arrives in Okinawa, the UV Index remains notably high, measuring 12 in the extreme category, with a burn time of just 10 minutes. This slight decline from the peak of 13 seen during the summer months suggests that while the intense sun persists, there’s a hint of relief as autumn approaches. However, caution is still paramount, as the shorter burn time means sun protection is vital for anyone enjoying outdoor activities. Comparing the trends, it’s clear that from January’s 7 to September's 12, the sun's intensity has gradually escalated, making it essential to stay informed about the Okinawa UV Index for safe sun exposure.
UV Risk Categories
September in Okinawa, Japan, continues the region's remarkable sunshine trend, boasting 295 hours of radiant daylight. As summer eases into fall, this month reflects a slight dip from the summer peak, with July and August shining brilliantly at 317 and 319 hours, respectively. However, September still shines brighter than many other months, comfortably above the average of the year. The gradual decrease in sunlight from summer to autumn hints at seasonal changes, yet the warmth and brightness linger, inviting both locals and travelers to embrace the last days of summer's glow before transitioning into the cooler months ahead. Okinawa’s September weather encapsulates the essence of tropical bliss, offering ample opportunities to bask in the sun-drenched beauty of this stunning island.
As summer fades, September in Okinawa, Japan, ushers in a notable shift in weather patterns, boasting a remarkable 59% chance of sunny days. This marks a significant jump from the lower probabilities seen during the early months of the year. With the sun shining more frequently than in both August (39%) and October (51%), September provides an ideal backdrop for outdoor activities. This upward trend in sunshine not only enhances the island's vibrant landscapes but also invites visitors to bask in the warm embrace of Okinawa's natural beauty. Travelers can look forward to a delightful blend of sunny skies, perfect for exploring the stunning beaches and rich cultural heritage.
September in Okinawa marks the transition from the sun-soaked heights of summer to the cooler embrace of autumn, with daylight lasting around 12 hours. This month reflects a gradual decline from the peak summer brightness of 13 hours in the preceding months, illustrating a subtle shift as the days begin to shorten. Throughout the year, Okinawa enjoys a generous amount of sunlight, with January and November dipping to 10 hours, while the bright stretch from May to August showcases the island's vibrant summer atmosphere. As September fades into October, the daylight diminishes further, inviting a cozy ambiance that characterizes the fall season. This rhythm of daylight not only shapes daily life but also sets the stage for seasonal festivities and natural beauty in this idyllic region of Japan.
In September, Okinawa experiences a gentle shift in its breezy temperament, with an average wind speed of 5.4 m/s (12 mph). This marks a decline from the stronger gusts of summer, where the wind speeds reached up to 7.5 m/s (17 mph) in July. As the summer heat begins to wane, the winds become more subdued, creating a harmonious and tranquil atmosphere ideal for enjoying the coastal beauty of the island. Following September, winds pick up again in October and November, ramping back up to 7.9 m/s (18 mph), signaling a return to more robust breezes as the year transitions into fall. Overall, the September winds in Okinawa embody a peaceful interlude, inviting visitors to relish the calm before the seasonal shift.
Weather in Okinawa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Okinawa, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is warm and humid, with average temperatures around 28°C (82°F) and maximums reaching up to 30°C (87°F). The month is characterized by significant rainfall, totaling 253 mm (10.0 in) over about 19 days, contributing to a high humidity level of 82%. In contrast, January offers a cooler climate, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 24°C (75°F), averaging 19°C (66°F). The precipitation during this month is considerably lower at 91 mm (3.6 in), spread over just 11 days, and the humidity drops to 71%. For more detailed information, you can check Okinawa weather in January.
September and February present significantly different weather patterns. In September, the temperatures are notably warmer, with a minimum of 24°C (75°F) and an average of 28°C (82°F), reaching a high of 30°C (87°F). However, this month also experiences high humidity at 82% and considerable rainfall, averaging 253 mm (10.0 in) over 19 days. In contrast, February boasts cooler temperatures, with a minimum of 12°C (54°F), an average of 19°C (66°F), and a maximum of 24°C (76°F). The precipitation is much lighter, totaling 97 mm (3.8 in) over 12 days, and the humidity is lower at 71%. For more detailed weather information, you can check Okinawa weather in February.
September and March present contrasting weather patterns. September is characterized by much warmer temperatures, with a minimum of 24°C (75°F) and an average high reaching 30°C (87°F). Moreover, it experiences significant rainfall, accumulating 253 mm (10.0 in) over approximately 19 days, alongside high humidity levels of 82%. In contrast, March brings cooler temperatures, with a minimum of 14°C (57°F) and an average high of 24°C (76°F). Rainfall during this month is notably lower, totaling 107 mm (4.2 in) over 11 days and with a humidity level of 76%. For more details, you can check Okinawa weather in March.
September and April present contrasting weather patterns in Okinawa. September boasts higher temperatures, with minimums around 24°C (75°F) and average highs reaching up to 30°C (87°F), while April presents cooler conditions, with minimums of 15°C (60°F) and maximums of 26°C (79°F). Additionally, September experiences significantly more rainfall, totaling 253 mm (10.0 in) across 19 days, compared to April's 137 mm (5.4 in) over 11 days. Despite the similar humidity levels of 82% in both months, the overall climate feels quite different, making September notably more tropical and wet compared to the milder, drier atmosphere of April. For more details, check Okinawa weather in April.
In comparing the weather of September and May, September typically experiences warmer temperatures, with a minimum of 24°C (75°F) and an average of 28°C (82°F), peaking at 30°C (87°F). In contrast, May sees cooler temperatures, ranging from a minimum of 19°C (67°F) to a maximum of 27°C (82°F), with an average of 24°C (76°F). Additionally, September is marked by higher precipitation, with 253 mm (10.0 in) of rainfall over 19 days, compared to May, which receives 208 mm (8.2 in) over just 12 days. Humidity levels are similar, with September at 82% and May slightly higher at 84%. For more detailed insights into May weather, you can check Okinawa weather in May.
When comparing the weather in September to June, it's evident that September tends to be slightly warmer, with average temperatures reaching 28°C (82°F) compared to June's 26°C (80°F). Both months experience significant precipitation, but September typically sees less, with 253 mm (10.0 in) compared to June's 302 mm (11.9 in), despite both months having rainfall on 19 days. Additionally, humidity levels are marginally lower in September at 82%, while June has a slightly higher humidity of 86%. For more detailed information, you can check Okinawa weather in June.
In comparing the weather of September and July, we find that both months exhibit similar average temperatures, hovering around 28°C (82°F), with maximum temperatures reaching 30°C (87°F). However, September tends to be slightly cooler at night, with a minimum temperature of 24°C (75°F), compared to July's minimum of 26°C (78°F). Additionally, September experiences significantly more rainfall, with 253 mm (10.0 in) spread over 19 days, while July sees less precipitation at 192 mm (7.6 in) over just 13 days. Humidity levels are also higher in July at 86%, compared to 82% in September. For a closer look at July weather specifics, you can check Okinawa weather in July.
In September, the weather remains similar to August, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 30°C (87°F), keeping the average at 28°C (82°F). However, September experiences increased precipitation, totaling 253 mm (10.0 in) over 19 days, compared to August’s 205 mm (8.1 in) over 17 days. Both months maintain consistent humidity at 82%, but September's rain makes it feel more humid overall. For more detailed information, you can check out Okinawa weather in August.
September in Okinawa tends to be warmer and wetter compared to October. With average temperatures around 28°C (82°F) and maximum highs reaching 30°C (87°F), the month also experiences significant rainfall, totaling 253 mm (10.0 in) over 19 days. In contrast, October sees slightly cooler temperatures, with averages dropping to 26°C (79°F) and maximums of 29°C (84°F). Additionally, precipitation decreases to 160 mm (6.3 in) over just 13 days, accompanied by a similar level of humidity at 80%. For more details on October's weather conditions, you can visit Okinawa weather in October.
In September, the weather is notably warmer, with average temperatures around 28°C (82°F) and highs reaching up to 30°C (87°F). However, this month also experiences significant rainfall, with 253 mm (10.0 in) of precipitation over 19 days, contributing to a high humidity level of 82%. In contrast, November offers a cooler climate, with average temperatures dropping to 23°C (74°F) and maximum temperatures capping at 27°C (80°F). Rainfall is much less prevalent in November, totaling 103 mm (4.1 in) over just 11 days, and humidity slightly decreases to 79%. For more detailed information, you can refer to Okinawa weather in November.
In September, the weather in Okinawa is marked by higher temperatures, with a minimum of 24°C (75°F) and an average of 28°C (82°F), peaking at 30°C (87°F). The month also sees significant rainfall, with 253 mm (10.0 in) over 19 days and humidity levels reaching 82%. In contrast, December offers a cooler climate, where temperatures dip to a minimum of 14°C (58°F) and average around 20°C (69°F), with a maximum of 25°C (78°F). Precipitation decreases to 188 mm (7.4 in) across 16 days, and humidity falls to 75%. For more detailed information on December weather patterns in Okinawa, you can visit Okinawa weather in December.
As September unfolds in Okinawa, visitors can expect a blend of warm and humid conditions that set it apart from other months. With temperatures averaging around 28°C and higher humidity levels, the island feels particularly lush and vibrant during this time. However, be prepared for frequent rain, as September typically sees significant precipitation, making it one of the wetter months of the year. This rainfall, coupled with warm temperatures, creates a subtropical atmosphere that's both refreshing and invigorating. For those planning a trip, the unique weather patterns of September can enhance your experience, but it’s essential to stay informed. To learn more about how Okinawa’s climate changes throughout the year, check out Okinawa Climate.