August Weather in Okinawa, Japan

Last updated: August 21, 2025

In Okinawa, Japan during August, temperatures reach a maximum of 30°C (87°F), with a pleasant average of 28°C (83°F) and a minimum of 26°C (78°F). This period is characterized by high humidity levels, averaging around 82%, which can make the warmth feel more intense. Rainfall is a significant aspect of Okinawa's weather this month, with a total precipitation of 205 mm (8.1 in) distributed over approximately 17 days. Visitors can expect a tropical atmosphere filled with vibrant summer energy, perfect for enjoying the region's stunning natural beauty, though it's wise to prepare for occasional rain showers.

August Temperature in Okinawa

In Okinawa, Japan, August marks the peak of summer, where the temperature trend stabilizes at warm levels. The minimum temperature remains comfortably steady at 26°C (78°F), while the average and maximum temperatures reach a vibrant 28°C (83°F) and 30°C (87°F), respectively. This consistency highlights the island's tropical climate, offering long, sun-soaked days perfect for beach outings and outdoor adventures. As the month progresses, the warmth lingers, inviting visitors to indulge in the lush scenery and cultural richness that Okinawa is famed for. August truly embodies the essence of summer bliss on this idyllic island.

August Weather in Okinawa: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Okinawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Okinawa, August typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec656568707580828382797468
Data source: Temperature data for Okinawa generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Okinawa

In August, Okinawa experiences a noteworthy increase in precipitation, with an average of 205 mm (8.1 in), juxtaposed against the preceding month's total of 192 mm (7.6 in). This uptick is mirrored by the 17 days of rainfall, indicating that summer showers are becoming more frequent as the season progresses. As the region transitions towards autumn, the precipitation levels continue to rise, setting the stage for September's average of 253 mm (10.0 in). August’s rainfall not only contributes to the lush greenery of the island but also highlights a broader trend of increased moisture in the summer months, with June and September boasting the highest totals. Overall, this pattern illustrates Okinawa's humid subtropical climate, characterized by distinct wet periods that rejuvenate the island's natural beauty.

August Precipitation Trends in Okinawa

The chart displays monthly precipitation patterns in Okinawa, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Okinawa, August typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec9197107137208302192206253160104188
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Okinawa

In August, Okinawa experiences a humidity level of 82%, marking a slight decline from the peak humidity of 86% seen in the preceding summer months of June and July. This mid-summer humidity, while still high, suggests a gradual easing as the region transitions into the fall. Throughout the year, Okinawa's humidity shows a clear upward trend from the cooler, drier months of January and February—both at 71%—reaching a climax in the sultry summer months. As September approaches, humidity levels stabilize at 82%, indicating that even as summer wanes, the tropical air remains prevalent and invigorating. The overall climate pattern reveals that while the heat persists, a hint of relief is on the horizon, offering respite to those enjoying the balmy Okinawan atmosphere.

August Average Humidity in Okinawa

This chart illustrates the average monthly humidity levels in Okinawa, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Okinawa is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%71%76%82%84%86%86%82%82%81%79%75%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Okinawa

In August, Okinawa experiences a consistently high UV Index of 13, maintaining its status in the extreme exposure category alongside the preceding summer months. This level of UV radiation demands caution, with a burn time of just 10 minutes for unprotected skin. The trend throughout the summer showcases an intensity of sunlight that remains unabated, peaking in May, June, July, and August before tapering off slightly in September. As the intensity of the sun decreases in the fall months, travelers and locals alike should remain vigilant about sun protection in August, a reminder of Okinawa's warm and radiant climate. For more details on UV exposure throughout the year, visit Okinawa UV Index.

Maximum UV Index Levels in Okinawa for August

The chart shows the monthly maximum UV Index (UVI) for Okinawa in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Okinawa typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec7911121313131312996
Data source: Okinawa August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

August Sunshine in Okinawa

August in Okinawa, Japan, shines brightly as a pinnacle of sunshine, boasting an impressive 319 hours of glorious daylight. This marks a delightful culmination of the warmer months, following July's 317 hours. The summer months reveal a clear trend toward greater sunlight, with hours steadily increasing from January's modest 154 hours to a sun-drenched peak in late summer. The trajectory of sunshine not only enhances outdoor activities but also underscores Okinawa's allure as a perfect summer getaway. As the year transitions into September, the sun continues to shine brightly with 295 hours, yet the gradual decline hints at the approaching autumn, making August a truly vibrant highlight in the island's annual cycle of sunshine.

Monthly Sunshine Duration in Okinawa: August Highlighted

The August sunshine duration represents the total number of hours Okinawa experiences direct sunlight during the month of August, excluding cloudy or obstructed periods. This chart compares the sunshine duration of August with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec154h203h268h269h305h264h317h319h295h274h228h192h
Data source: Okinawa August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Okinawa During August

In Okinawa, August boasts a 39% chance of sunny weather, making it one of the more favorable summer months for sun-seekers. While this percentage is lower compared to the peak of 59% in September and 51% in October, it remains consistent with the trend seen in the earlier summer months of June (9%) and July (30%). This gradual increase in sunshine probability towards the end of summer suggests that visitors can still enjoy the warmer days and outdoor activities, despite the higher chances of rain earlier in the summer season. Overall, while August may not be the sunniest of the year, it offers a promising balance of sunny days amidst the tropical charm of Okinawa.

Percentage of Sunny Days in August in Okinawa

The chart illustrates the percentage of sunny days in Okinawa throughout the year, with August highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Okinawa experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec24%42%46%39%30%9%30%39%59%51%44%35%
Data source: Okinawa August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Okinawa in August

In Okinawa, Japan, August marks the peak of summer with a delightful 13 hours of daylight, mirroring the sunlight enjoyed during the preceding months of June and July. As the year progresses, daylight duration gradually increases from 10 hours in January to the vibrant 13 hours in late spring and summer before tapering off to 12 hours in September. This pattern reflects the region's warm tropical climate, where long days coincide with the warmest months, creating perfect conditions for outdoor adventures. As autumn approaches, daylight hours retreat, hinting at the seasonal changes ahead while allowing locals and visitors to bask in the summer sun just a little longer in August.

Average Daylight Hours in Okinawa for August

The chart illustrates the variation in daylight duration in Okinawa throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 41m11h 15m12h12h 46m13h 25m13h 44m13h 34m13h 1m12h 16m11h 30m10h 51m10h 30m
Data source: Okinawa daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Okinawa

In Okinawa, Japan, the wind whispers a gentle melody throughout the year, with its patterns revealing intriguing trends. In August, the average wind speed rests at 6.9 m/s (15 mph), slightly lower than the breezy peaks of 7.5 m/s (17 mph) seen in July. This month marks a transition toward calmer winds, heading into the quieter months of September, where the speed dips even further to 5.4 m/s (12 mph). Notably, the winter months bring a resurgence, with October and November both reaching 7.9 m/s (18 mph). Overall, Okinawa’s winds fluctuate gracefully throughout the year, enhancing the island's captivating charm.

Average August Wind Speed in Okinawa

The chart displays monthly wind speed patterns in Okinawa, with values for each month shown alongside August's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how August's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec8.26.95.97.66.36.57.56.9 m/s5.47.97.97.7
Data source: Okinawa August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Okinawa Compares to Other Months

Weather in Okinawa varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Okinawa, focusing on differences in temperature, rainfall, humidity, and UV levels.

August and January present strikingly different weather patterns. August boasts high temperatures, with minimums around 26°C (78°F) and average maximums hitting 30°C (87°F), accompanied by high humidity at 82%. In contrast, January experiences cooler conditions, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 24°C (75°F) and a lower average of 19°C (66°F). Additionally, January sees significantly less precipitation, with 91 mm (3.6 in) over 11 days compared to August's 205 mm (8.1 in) over 17 days. For more details on the specifics of January’s weather, you can visit Okinawa weather in January.

August and February present strikingly different weather patterns. In August, the region experiences a warm climate with average temperatures around 28°C (83°F), peaking at 30°C (87°F), accompanied by high humidity levels of 82%. This month also sees significant rainfall, averaging 205 mm (8.1 in) over 17 days. In contrast, February offers a much cooler atmosphere with average temperatures of 19°C (66°F) and highs reaching 24°C (76°F). The precipitation decreases substantially to 97 mm (3.8 in) over just 12 days, and humidity levels drop to 71%. For a more detailed look at the conditions specific to February, visit Okinawa weather in February.

August weather in Okinawa is characterized by higher temperatures, with minimums around 26°C (78°F) and averages reaching 28°C (83°F), peaking at a maximum of 30°C (87°F). The month is quite humid, averaging 82%, and experiences significant rainfall, totaling 205 mm (8.1 in) over 17 days. In contrast, March offers a much cooler climate, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 24°C (76°F) and an average of 20°C (68°F). March sees lower humidity at 76% and less precipitation, measuring 107 mm (4.2 in) across 11 days. For more details on the weather during this month, you can check Okinawa weather in March.

In comparing the weather of August and April, it's clear that August is significantly warmer, with average temperatures ranging from a minimum of 26°C (78°F) to a maximum of 30°C (87°F). In contrast, April offers a cooler climate, with average temperatures between 15°C (60°F) and 26°C (79°F). Additionally, August experiences higher precipitation, totaling 205 mm (8.1 in) over 17 days, compared to April's 137 mm (5.4 in) over just 11 days. Despite the increased rainfall in August, both months maintain the same humidity level of 82%. For more detailed information, you can refer to Okinawa weather in April.

August weather in Okinawa is characterized by higher temperatures, with minimums around 26°C (78°F) and averaging 28°C (83°F), reaching a maximum of 30°C (87°F). In contrast, May offers a milder range, with minimums of 19°C (67°F) and an average of 24°C (76°F), peaking at 27°C (82°F). Both months experience significant rainfall, with August receiving about 205 mm (8.1 in) over 17 days and May slightly more at 208 mm (8.2 in) across 12 days. Humidity remains relatively high in both months, with August at 82% and May slightly higher at 84%. For a detailed comparison of the weather in May, you can check out Okinawa weather in May.

In comparing the weather between August and June, August tends to be slightly warmer with temperatures ranging from a minimum of 26°C (78°F) to a maximum of 30°C (87°F), averaging around 28°C (83°F). In contrast, June experiences cooler temperatures, with an average of 26°C (80°F) and a maximum of 29°C (84°F). However, June sees higher precipitation levels, with 302 mm (11.9 in) over 19 days, compared to August's 205 mm (8.1 in) over 17 days. Additionally, humidity remains high in both months, but June registers a marginally higher average at 86% compared to August's 82%. For more detailed insights into June's weather, you can visit Okinawa weather in June.

In comparing the weather in August to July, both months exhibit similar temperature ranges, with minimal differences in their averages and extremes, maintaining a steady 26°C (78°F) for the minimum, 28°C (83°F) for the average, and 30°C (87°F) for the maximum. However, August experiences slightly more rainfall, receiving 205 mm (8.1 in) over 17 days, compared to July's 192 mm (7.6 in) over 13 days. Additionally, humidity levels in August average around 82%, slightly lower than July's 86%. This suggests that while the temperatures remain consistent, August tends to be wetter and less humid than July, making it a more challenging month for outdoor activities. For more detailed insights on July's weather, check out Okinawa weather in July.

In August, the weather tends to be hot and humid, with average temperatures around 28°C (83°F) and a significant amount of rainfall totaling 205 mm (8.1 in) over 17 days. September offers a similar average temperature, but features slightly lower minimum temperatures at 24°C (75°F) while rainfall increases to 253 mm (10.0 in) across 19 days, indicating a wetter month. Both months maintain a humidity level of 82%, creating a consistent tropical feel, but the increased precipitation in September may suggest a shift towards more frequent showers. For more detailed insights into September weather, you can check this link: Okinawa weather in September.

In August, the weather tends to be hotter and more humid, with temperatures ranging from a minimum of 26°C (78°F) to a maximum of 30°C (87°F), accompanied by significant rainfall of 205 mm (8.1 in) over 17 days. The high humidity level of 82% can make the heat feel more intense. In contrast, October experiences milder temperatures, with a minimum of 21°C (71°F) and a maximum of 29°C (84°F), and overall lower precipitation at 160 mm (6.3 in) over just 13 days. The humidity also decreases slightly to 80%, making October a more comfortable time to enjoy the outdoors. For more details, you can visit Okinawa weather in October.

August and November weather exhibit distinct differences in temperature and precipitation patterns. August is significantly warmer, with average temperatures reaching up to 28°C (83°F) and a high of 30°C (87°F), while November's temperatures are milder, averaging around 23°C (74°F) with a maximum of 27°C (80°F). Additionally, August experiences a higher level of rainfall, recording 205 mm (8.1 in) over 17 days, compared to November's 103 mm (4.1 in) over just 11 days. Humidity levels remain fairly similar in both months, at 82% for August and slightly lower at 79% for November. For a detailed overview of conditions during November, visit Okinawa weather in November.

In August, the weather is notably warmer and more humid, with temperatures ranging from a minimum of 26°C (78°F) to a maximum of 30°C (87°F) and an average of 28°C (83°F). The month also experiences considerable rainfall, with 205 mm (8.1 in) over 17 days and a humidity level of 82%. In contrast, December brings much cooler temperatures, with a minimum of 14°C (58°F), an average of 20°C (69°F), and a maximum of 25°C (78°F). Although December has slightly less rainfall at 188 mm (7.4 in) and 16 rainy days, the humidity drops to 75%. For a more detailed look at the weather during this month, you can visit Okinawa weather in December.

Compare Okinawa's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Okinawa

August in Okinawa offers a warm and humid tropical experience, with temperatures consistently hovering around a pleasantly hot average of 28°C (83°F). Unlike other months, August sees an increase in precipitation, with rain appearing on 17 days, leading to an overall wet atmosphere. This combination of high humidity at 82% and frequent showers sets August apart as one of the most tropical months, making it ideal for enjoying lush landscapes but requiring some preparation for sudden downpours. For those planning a visit, understanding the unique nuances of Okinawa's August weather is essential. To learn more about the climate throughout the year, visit Okinawa Climate.