Last updated: August 21, 2025
In August, Kumamoto, Japan experiences a vibrant and humid summer, with maximum temperatures reaching up to 34°C (94°F) and an average of 27°C (82°F). Nighttime brings a comfortable minimum temperature of around 19°C (67°F), offering a brief respite from the heat. However, this month is also characterized by significant rainfall, accumulating to 238 mm (9.4 in) over 14 days, contributing to the region's lush scenery. With a humidity level hovering around 91%, visitors can expect a sultry atmosphere as they explore the beauty of Kumamoto during this lively season.
In August, Kumamoto, Japan, experiences a warm and humid climate, with temperatures reflecting the height of summer. The minimum temperature sits at a comfortable 19°C (67°F), while the average rises to a balmy 27°C (82°F), peaking at a sizzling 34°C (94°F). This month marks a noticeable increase in warmth compared to the milder months preceding it, such as July, which also boasts high temperatures, but with slightly cooler averages. As autumn approaches in September, temperatures begin to cool, yet August stands out for its vibrant, summery ambiance, inviting both locals and travelers to enjoy the heat before the seasonal transition.
In August, Kumamoto experiences a notable dip in precipitation compared to the preceding months, receiving 238 mm (9.4 in) of rain over 14 days. This volume represents a significant reduction from the record highs of July, which saw a staggering 406 mm (16.0 in) over 17 days. While August's rainfall is still robust, it marks a transition from the intense summer rains, with precipitation levels starting to align more closely with those of September, which sees 171 mm (6.7 in) over the same number of days. This pattern illustrates the typical shift in Kumamoto's climate as the summer season begins to close, offering a brief respite before the arrival of autumnal showers.
August in Kumamoto, Japan, often serves as a peak in humidity, with levels sitting at a notable 91%. This month follows a pattern of rising moisture, particularly dramatic from June to July, where humidity escalates to a steamy 92%. While August sees a slight dip, the oppressive humidity still prevails, promising a sultry environment as summer begins to transition toward fall. Throughout the year, the humidity fluctuates, starting from a relatively comfortable 75% in January, climbing steadily to its summer zenith. As the seasons shift, humidity levels gradually decline, finishing the year with 79% in December. This trend highlights Kumamoto's distinct seasonal shifts, where moisture is a defining characteristic of its hot, humid summer months.
In August, Kumamoto experiences its peak UV Index at 13, categorized as extreme and leaving residents and visitors with a burn time of just 10 minutes. This marks a continuation of the summer months where the UV Index consistently hovers between 12 and 13, indicating a serious need for sun protection. Following a gradual increase from 5 in January to this summer zenith, the trend underscores the importance of being vigilant against harmful UV exposure during these high-risk months. As the autumn approaches, the UV levels begin to taper off to 11 in September before settling down in October. Be sure to arm yourself with adequate sun protection during this time, and for detailed insights, check out the Kumamoto UV Index.
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In Kumamoto, Japan, August shines as the pinnacle of sunlight, boasting an impressive 294 hours of bright, clear days. This vibrant month follows a steady ascent in sunshine hours, beginning with 188 hours in January and gradually climbing as spring unfolds into summer. The increase is marked by April and May, where hours peak at the pre-summer highs of 280 and 279 hours, respectively. Interestingly, even as the summer heat reaches its zenith in August, sunshine hours remain robust, showcasing a trend of longer, brighter days that offer a radiant farewell to the summer season. As September rolls in with 251 hours, the daylight gradually recedes, marking a smooth transition into the softer hues of autumn.
In Kumamoto, Japan, August marks a transitional phase in weather patterns, with a 27% chance of sunny days. This figure reflects a notable dip compared to the earlier months of the year, particularly from January to April, where sunny days are more frequent, ranging from 37% to 44%. As summer peaks, a trend emerges with July experiencing the lowest likelihood of sun at 19%, indicating a tendency for more rainy days. However, as the region progresses into September and October, the chance of sunny weather shows a promising recovery, rising to 34% in September and significantly improving to a robust 63% in October. Overall, while August may not be the sunniest month, it offers a glimpse of the sunnier days that follow in the autumn months.
In Kumamoto, Japan, August brings a delightful 13 hours of daylight, marking the peak of summer when the sun shines longer than it will for most of the year. This month, however, shows a gradual decline from the 14 hours enjoyed in June and July, indicating the onset of the subtle transition into autumn. As daylight begins to wane, the embrace of longer evenings can remind residents of the fleeting warmth and brightness of summer. Following this pattern, daylight steadily diminishes, with September boasting 12 hours, and a further drop to 11 hours in October, continuing the trend of shortening days as the year progresses. This ebb and flow of daylight not only influences daily activities but also enriches the seasonal experience in this vibrant region.
In Kumamoto, Japan, the wind speeds throughout the year exhibit subtle variations that reflect the changing seasons. August, with an average wind speed of 2.4 m/s (5 mph), aligns closely with the gentle breezes typical of late summer. This marks a slight dip from the more robust winds of early spring, where March and April see averages of 2.4 m/s and 2.6 m/s respectively. Interestingly, the summer months, particularly June, present the calmest winds at 1.7 m/s (4 mph), creating a tranquil atmosphere perfect for enjoying the vibrant landscapes. As the year transitions into the fall, wind speeds tend to stabilize around 2.1 m/s to 2.2 m/s, hinting at a serene breeze that accompanies the seasonal shifts. Overall, the wind in Kumamoto offers a gentle companion to the region's natural beauty throughout the year.
Weather in Kumamoto varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Kumamoto, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, Kumamoto experiences a warm and humid climate, with temperatures ranging from a minimum of 19°C (67°F) to a scorching maximum of 34°C (94°F) and an average of 27°C (82°F). The month sees significant rainfall, with about 238 mm (9.4 in) collected over 14 days, resulting in a high humidity level of 91%. In stark contrast, January presents a much cooler atmosphere, as temperatures dip to a minimum of -3°C (27°F) and reach a maximum of 17°C (63°F), averaging around 6°C (44°F). Precipitation is significantly lower in January, totaling 63 mm (2.5 in) over just 8 days, with humidity dropping to 75%. For more detailed information, you can refer to Kumamoto weather in January.
August and February present stark contrasts in weather in Kumamoto. August features a warm climate with temperatures ranging from a minimum of 19°C (67°F) to a scorching maximum of 34°C (94°F), accompanied by high humidity levels at 91%. This month also experiences significant rainfall, with about 238 mm (9.4 in) over 14 days. In contrast, February brings much cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 19°C (66°F), averaging only 7°C (45°F). The humidity is lower at 71%, and precipitation is reduced to 105 mm (4.2 in) over 11 days. For more detailed conditions on Kumamoto during this month, check out Kumamoto weather in February.
August and March present two contrasting weather patterns. In August, temperatures soar with a minimum of 19°C (67°F) and an average of 27°C (82°F), reaching highs of 34°C (94°F). This month is characterized by high humidity at 91% and significant rainfall, receiving 238 mm (9.4 in) spread over 14 days. In stark contrast, March experiences much cooler weather, with minimum temperatures dropping to 1°C (34°F) and an average of 11°C (52°F), peaking at 22°C (72°F). March also sees less precipitation, totaling 143 mm (5.6 in) over the same number of rainy days, but its humidity is notably lower at 71%. For further details on March weather, you can check Kumamoto weather in March.
In comparing the weather of August and April, it’s clear that August is significantly warmer and more humid. In August, temperatures range from a minimum of 19°C (67°F) to a maximum of 34°C (94°F), with an average of 27°C (82°F), whereas April's temperatures are much cooler, ranging from 3°C (38°F) to 26°C (79°F), with an average of 15°C (59°F). Additionally, August experiences higher precipitation, with 238 mm (9.4 in) falling over 14 days compared to April's 135 mm (5.3 in) over 9 days. The humidity is also notably higher in August at 91%, compared to April's 78%. For more details on April's climate, you can check Kumamoto weather in April.
August typically features much warmer temperatures compared to May, with average highs reaching 34°C (94°F) compared to May's peak of 28°C (83°F). The contrast in humidity is also notable, as August boasts a higher humidity level of 91%, making it feel warmer and more tropical. In terms of precipitation, August sees slightly more rain, averaging 238 mm (9.4 in) over 14 days, while May experiences 207 mm (8.1 in) across 12 days. For a detailed look at May weather in Kumamoto, check out Kumamoto weather in May.
When comparing the weather in August and June, August tends to be hotter and more humid. In August, temperatures range from a minimum of 19°C (67°F) to a maximum of 34°C (94°F) with an average of 27°C (82°F), while June has cooler temperatures, with a minimum of 15°C (58°F) and a maximum of 30°C (87°F), averaging 23°C (73°F). Precipitation is relatively similar, with August receiving 238 mm (9.4 in) over 14 days, compared to June's 280 mm (11.0 in) over 15 days. Additionally, August features a higher humidity level at 91%, compared to 86% in June. For a more detailed look at June's climate, you can check Kumamoto weather in June.
In comparing the weather of July and August, both months experience warm temperatures, with August slightly warmer, averaging 27°C (82°F) compared to July's 26°C (79°F). Both months also reach similar maximums of around 34°C (93°F to 94°F). However, August sees a notable decrease in precipitation, with 238 mm (9.4 in) over 14 days, compared to July's higher total of 406 mm (16.0 in) over 17 days. Humidity levels remain high in both months, with August at 91% and July slightly higher at 92%. For more detailed insights, you can check the specific conditions for July by visiting Kumamoto weather in July.
August typically experiences warmer temperatures with a minimum of 19°C (67°F) and an average of 27°C (82°F), reaching highs of up to 34°C (94°F). In contrast, September sees a slight drop in temperature, making it more comfortable, with a minimum of 14°C (57°F) and an average of 24°C (76°F), while still peaking at 34°C (93°F). Precipitation is also reduced in September, totaling 171 mm (6.7 in) spread over 14 days, compared to the wetter conditions in August with 238 mm (9.4 in) on the same number of days. Humidity levels decline as well, from 91% in August to 84% in September, contributing to a more pleasant atmosphere. For more detailed weather information, you can check out Kumamoto weather in September.
The weather in August is notably warmer than in October, with average temperatures reaching 27°C (82°F) compared to October's average of 19°C (67°F). August is characterized by higher humidity at 91% and significant rainfall, totaling 238 mm (9.4 in) over 14 days, making it one of the wetter months. In contrast, October experiences milder weather with lower humidity (83%) and less precipitation, totaling 117 mm (4.6 in) over just 9 days. For those interested in a more detailed overview, you can check out Kumamoto weather in October.
In August, the weather is characterized by warm temperatures, with minimums around 19°C (67°F) and maximums reaching up to 34°C (94°F). The month is also marked by high humidity levels at 91% and significant rainfall, averaging 238 mm (9.4 in) over approximately 14 days. In contrast, November brings much cooler temperatures, with minimums dropping to 2°C (36°F) and average highs around 24°C (76°F). Precipitation also decreases to 76 mm (3.0 in) over 9 days, coupled with slightly lower humidity at 81%. For more detailed information, you can check out Kumamoto weather in November.
August and December present strikingly different weather patterns. In August, temperatures soar with a minimum of 19°C (67°F) and an average of 27°C (82°F), reaching highs of up to 34°C (94°F). This month is characterized by high humidity at 91% and significant rainfall, with 238 mm (9.4 in) over 14 days. In contrast, December offers a much cooler climate, with temperatures dropping to a minimum of 0°C (32°F) and an average of just 8°C (47°F), peaking at 22°C (71°F). Precipitation is also lighter in December, totaling 84 mm (3.3 in) over 9 days, accompanied by a lower humidity of 79%. For more detailed information, visit Kumamoto weather in December.
August in Kumamoto presents a distinct climatic profile, characterized by high temperatures and elevated humidity levels that set it apart from the cooler months of the year. As the warmest month, it experiences frequent precipitation, with nearly half the days seeing rain, which contributes to a lush, vibrant landscape amidst the heat. This combination creates a stifling atmosphere, making August feel particularly intense compared to the milder conditions of spring and autumn. For more detailed insights on the seasonal variations, you can explore the Kumamoto Climate.