Last updated: August 21, 2025
In August, Okayama, Japan experiences a blend of warmth and humidity that defines the summer season. With maximum temperatures soaring to a sweltering 37°C (99°F) and an average of 29°C (85°F), residents and visitors alike can expect a tropical atmosphere. Nights, however, offer a reprieve, cooling down to a minimum of 18°C (65°F). This month also brings considerable rainfall, accumulating to 171 mm (6.7 in) over about 11 days, contributing to the region's lush landscapes. The high humidity levels, averaging around 92%, enhance the summer feel and might bring a refreshing challenge for those unaccustomed to tropical conditions. August in Okayama is a vibrant tapestry of heat, moisture, and the rich beauty of nature.
In August, Okayama, Japan, experiences a warm and sultry climate, with temperatures that reflect the peak of summer. The minimum temperature hovers at a comfortable 18°C (65°F), providing a pleasant start to the day, while the average temperature rises to a balmy 29°C (85°F). As the sun climbs higher, the maximum temperature can soar to an impressive 37°C (99°F), making it one of the hottest months of the year. This trend showcases a clear pattern of increasing warmth leading into late summer, with August standing out as an ideal time for outdoor activities despite the heat. The transition from the previous month's temperatures indicates a significant rise, allowing residents and visitors alike to enjoy the vibrant summer atmosphere that Okayama has to offer.
In August, Okayama experiences a significant precipitation increase, recording an average of 171 mm (6.7 in) over 11 days, making it a notable month in terms of rainfall. This is a marked contrast to earlier summer months, particularly July, which sees a peak with 291 mm (11.5 in), but with more rainy days, totaling 17. Although August enjoys less rainfall than July, it still contributes to the region's humid summer climate, reflecting a consistent trend of elevated precipitation during the warmer months. Following this, September often continues on a similar note, showcasing 203 mm (8.0 in), suggesting a gradual transition into fall with lingering summer showers. Overall, the data highlights how Okayama's precipitation patterns fluctuates significantly throughout the year, with summer months consistently dominating in rainfall totals.
In Okayama, Japan, August marks the peak of humidity, maintaining a notable 92% level that mirrors the previous month of July. This summer heat sees humidity levels climbing from a more moderate 73% in March to a sweltering 84% in May, before escalating dramatically as June approaches. Throughout the summer, humidity remains high, with August weather characterized by a heavy, muggy atmosphere. As the season transitions into September, humidity begins to taper off slightly to 87%, hinting at the gradual shift in climate as autumn arrives. This trend showcases how Okayama experiences a distinct rise in humidity during the summer months, creating a notable contrast with the more comfortable levels found in the spring.
August in Okayama, Japan, experiences some of the highest UV levels of the year, with a UV Index peaking at 12, categorizing it as extreme exposure. This trend of elevated UV intensity continues from July, where the Index also reached 12, indicating that sun safety is paramount for residents and visitors alike. With a burn time of just 10 minutes, protective measures like sunscreen, sunglasses, and hats are crucial during this peak period. As summer transitions into fall, the UV Index begins to decrease in September, sliding down to 10, but August remains a critical month for sun safety awareness. For further details on what to expect throughout the year, explore the Okayama UV Index.
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In August, Okayama basks in an impressive 302 hours of sunshine, marking the peak of its sunlit splendor. Following the steady rise from 175 hours in January, the months leading up to summer display a remarkable trajectory, with July still shining brightly at 272 hours. However, it is the arrival of August that truly elevates the warmth, encapsulating the essence of summer with longer days filled with golden light. The sunny season begins to taper off in September with 247 hours, yet the vibrant days of August remain a memorable highlight, showcasing the allure of Okayama’s summer sun at its very best.
In Okayama, Japan, the likelihood of sunny weather in August reaches a modest 31%, aligning with the trend of decreased sunshine as the summer progresses. After experiencing a dip in sunny days during the peak months of June and July, August continues this pattern, indicating a gradual transition towards more favorable conditions starting in September. Notably, the sun has been more prevalent in the earlier months, with January and October boasting chances of 49% and 56% respectively, showcasing a distinct seasonal shift. Thus, while August may not be the sunniest month in Okayama, it paves the way for brighter days ahead as autumn approaches.
In Okayama, Japan, the trend of daylight duration throughout the year showcases a rich tapestry of seasonal changes. As winter fades, January and February offer a consistent 10 hours of daylight, gradually giving way to longer days in March with 11 hours and April's generous 13 hours. The peak of summer shines brightly in June and July, where daylight stretches to 14 hours, inviting outdoor adventures and late-night strolls. However, the vitality of summer ebbs in August, bringing 13 hours of daylight—a slight dip as the days begin to shorten. This pattern continues into autumn, where September holds onto 12 hours, eventually transitioning back to the 10 hours of daylight in November, reminiscent of the serene stillness of winter. As the year wraps up, December's 9 hours serves as a gentle reminder of the cyclical nature of daylight, shaping life in this vibrant region.
In August, Okayama, Japan experiences a gentle breeze with an average wind speed of 2.5 m/s (6 mph), a slight uptick compared to the calmer summer months of June and July. As we dive deeper into the wind patterns throughout the year, a noticeable trend emerges: the peak wind speeds are often recorded in the winter months of January and December, where they reach 3.2 m/s (7 mph) and 3.3 m/s (7 mph), respectively. Conversely, the summer showcases a lull, with August and its predecessors typically hovering around the 2.2 to 2.9 m/s mark. This gradual shift from winter's brisk winds to summer's softer whispers paints a picture of Okayama's dynamic climate, inviting both locals and visitors to appreciate the refreshing nuances of its seasonal breezes.
Weather in Okayama varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Okayama, focusing on differences in temperature, rainfall, humidity, and UV levels.
Comparing the weather in August and January reveals stark contrasts. August features a warm climate with average temperatures reaching 29°C (85°F) and peaks of up to 37°C (99°F), accompanied by high humidity levels at 92% and significant rainfall, totaling 171 mm over 11 days. In stark contrast, January is much cooler, with average temperatures around 6°C (42°F) and a maximum of only 16°C (62°F), experiencing minimal precipitation of just 33 mm over 3 days and slightly lower humidity at 82%. For more detailed insights on January weather, you can check out Okayama weather in January.
August and February present stark contrasts in weather conditions. In August, temperatures soar, with averages around 29°C (85°F) and highs reaching up to 37°C (99°F), creating a hot and humid environment with an average humidity of 92%. The month also sees considerable rainfall, accumulating 171 mm (6.7 in) over approximately 11 days. In contrast, February experiences much cooler temperatures, ranging from a low of -5°C (23°F) to an average of 6°C (43°F), with a maximum of 21°C (70°F). Precipitation is significantly lower at 47 mm (1.9 in) over just 5 days, and humidity levels are also reduced to 79%. For more detailed information on February weather, you can check Okayama weather in February.
August and March present markedly different weather conditions. August boasts high temperatures, with averages around 29°C (85°F) and maximums reaching 37°C (99°F), creating a hot and humid atmosphere characterized by an average humidity of 92%. In contrast, March experiences a much cooler climate, with average temperatures sitting at 10°C (51°F) and a maximum of 24°C (75°F), accompanied by significantly lower humidity at 73%. Additionally, while August sees more rainfall with 171 mm (6.7 in) over approximately 11 days, March has a more moderate precipitation of 94 mm (3.7 in) spread across 9 days. For more detailed information on March weather, you can visit Okayama weather in March.
When comparing the weather in August and April, it's clear that August is significantly warmer and more humid. In August, temperatures range from a minimum of 18°C (65°F) to a scorching maximum of 37°C (99°F), with an average of 29°C (85°F). In contrast, April has much cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 26°C (79°F), averaging at 15°C (59°F). Additionally, August experiences greater precipitation, with 171 mm (6.7 in) over 11 days, while April sees 119 mm (4.7 in) over 8 days. The humidity in August is notably higher at 92%, compared to April's 74%. For a closer look at what to expect during April, you can visit Okayama weather in April.
August is characterized by significantly warmer temperatures compared to May, with average highs reaching 29°C (85°F) and maximums peaking at 37°C (99°F), contrasting the milder May temperatures that range from a minimum of 7°C (45°F) to a maximum of 32°C (89°F). Additionally, August experiences higher humidity levels at 92%, compared to May's 84%. Both months see considerable rainfall, with August receiving 171 mm (6.7 in) over 11 days, while May collects 114 mm (4.5 in) over 9 days. For further details on May's weather, visit Okayama weather in May.
When comparing the weather in August to that in June, one can see a clear increase in temperature and humidity. August typically experiences a minimum of 18°C (65°F) and an average of 29°C (85°F), with maximum temperatures soaring up to 37°C (99°F). In contrast, June has a cooler temperature range, with a minimum of 12°C (54°F), an average of 23°C (74°F), and a maximum of 33°C (91°F). Additionally, August brings higher humidity levels at 92%, compared to June's 86%. Precipitation is also noteworthy, with August receiving 171 mm (6.7 in) over 11 days, slightly more than June's 153 mm (6.0 in) spread across 12 days. For more details on June's weather, visit Okayama weather in June.
In comparing the weather between July and August, both months experience similarly high maximum temperatures, reaching up to 37°C (99°F). However, August tends to be warmer overall, with an average temperature of 29°C (85°F), compared to July's average of 27°C (81°F). July, on the other hand, sees significantly more rainfall, with 291 mm (11.5 in) over 17 days, while August has a total of 171 mm (6.7 in) across 11 days. Both months maintain high humidity levels of 92%. For more detailed information, you can check out Okayama weather in July.
In comparing the weather between August and September, August tends to be warmer with average temperatures around 29°C (85°F), peaking at a high of 37°C (99°F). In contrast, September cools down, featuring an average temperature of 25°C (77°F) with a maximum of 36°C (97°F). While August is marked by high humidity at 92%, September experiences a drop to 87%. Precipitation levels also rise slightly in September, with 203 mm (8.0 in) over 12 days compared to 171 mm (6.7 in) over 11 days in August. For more details on September weather, check out Okayama weather in September.
August and October present a stark contrast in weather conditions. In August, temperatures soar with a minimum of 18°C (65°F) and an average of 29°C (85°F), peaking at a scorching 37°C (99°F). The high humidity of 92% and significant precipitation of 171 mm (6.7 in) over 11 days contribute to a sweltering atmosphere. In contrast, October brings a much cooler climate, with temperatures dropping to a minimum of 7°C (45°F), an average of 19°C (67°F), and a maximum of 32°C (90°F). While the precipitation remains similar at 169 mm (6.7 in) over 11 days, humidity levels decrease to 85%, providing a more comfortable feel. For more details, visit Okayama weather in October.
August and November present strikingly different weather patterns. In August, temperatures peak with highs reaching 37°C (99°F), accompanied by high humidity levels of 92% and significant rainfall of 171 mm (6.7 in) over 11 days. This creates a hot and muggy atmosphere ideal for summer activities. In contrast, November brings a marked shift with cooler temperatures, averaging 13°C (55°F) and a maximum of 25°C (77°F). The month is drier, with only 30 mm (1.2 in) of precipitation across just 3 days, and humidity levels decrease to 84%. For more detailed information, check out Okayama weather in November.
August presents a stark contrast to December in terms of weather. In August, temperatures soar with a minimum of 18°C and an average of 29°C, peaking at a maximum of 37°C, along with high humidity levels reaching 92%. The month also sees considerable rainfall, totaling 171 mm over 11 days. In December, however, the climate turns much cooler, with temperatures dropping to a minimum of -2°C and an average of 8°C, while highs only reach up to 20°C. Precipitation is significantly reduced to 45 mm over just 6 days, coupled with a slightly lower humidity of 82%. For more detailed information, you can check out Okayama weather in December.
As August arrives in Okayama, the weather takes on a distinctly hot and humid character, setting it apart from the milder months. With average temperatures soaring to 29°C (85°F) and a maximum peak of 37°C (99°F), this month stands out as the warmest time of the year. Additionally, the high humidity at 92% creates a tropical feel, often accompanied by frequent rain, with 11 days seeing measurable precipitation. This combination of heat and moisture significantly contrasts with the cooler, drier conditions typical of the spring and autumn months, making August a true hallmark of the Japanese summer. For more comprehensive insights into the seasonal variations, visit Okayama Climate.