Last updated: August 21, 2025
In May, Kumamoto, Japan experiences a delightful spring climate characterized by temperatures ranging from a maximum of 28°C (83°F) to a more moderate average of 19°C (67°F), with nighttime lows dipping to around 8°C (46°F). This month brings a significant amount of precipitation, totaling 207 mm (8.1 in), spread over 12 days. With an average humidity of 84%, the air can feel quite moist, adding to the lush greenery that typically blankets the region. Overall, May in Kumamoto offers a vibrant and refreshing atmosphere, inviting residents and visitors alike to enjoy the beauty of spring.
In May, Kumamoto, Japan, experiences a delightful transition into spring, with temperatures reflecting a marked warming trend. The month starts with a comfortable minimum of 8°C (46°F) and peaks at a cheerful maximum of 28°C (83°F), providing a pleasant average of 19°C (67°F). This shift from the cooler April climate, where temperatures ranged from 3°C (38°F) to 26°C (79°F), signals the approach of summer. As the days grow warmer, the vibrant greenery of the region flourishes, creating an inviting atmosphere perfect for exploring Kumamoto's scenic landscapes. Overall, May serves as a bridge to the warmth, setting the stage for the hotter months ahead.
May brings a significant increase in precipitation to Kumamoto, Japan, with 207 mm (8.1 in) of rainfall recorded, making it one of the wettest months of the year. This spike is complemented by an average of 12 rainy days, indicating that spring's transition into early summer is marked by frequent showers. The gradual rise in rainfall from 135 mm (5.3 in) in April reflects a clear trend towards the more humid conditions that dominate June and July. As the landscape blossoms under the nurturing rains, May not only signifies a shift in weather patterns but also sets the stage for the lush greenery that characterizes this region.
In Kumamoto, Japan, May marks a notable increase in humidity, reaching 84%, which is the highest point so far this year. This rise follows a steady climb from April's 78%, signaling the onset of the humid summer months ahead. As spring transitions to summer, the trend is clear: humidity levels are poised to intensify, peaking at an impressive 92% in July. This incremental elevation from January’s 75% showcases a pattern of gradually increasing moisture in the air, culminating in the sticky, sweltering conditions characteristic of the humid season. Expecting higher humidity can help prepare for the lush, vibrant atmosphere that defines this beautiful region during the warmer months.
In May, Kumamoto, Japan, experiences an extreme UV Index of 12, continuing the trend of heightened solar exposure that began in April. With a burn time of just 10 minutes, it's crucial for residents and visitors alike to take precautions while enjoying the outdoors. As the month progresses, the sun's intensity not only reflects a significant uptick from the earlier months but also ports the onset of summer, where similar extreme levels persist into June and July. This marked increase emphasizes the importance of UV protection, making it essential to stay informed and cautious. For more detailed insights into UV levels throughout the year, visit Kumamoto UV Index.
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In Kumamoto, Japan, May shines brightly with 279 hours of sunshine, marking a delightful transition from the spring months. Following April's peak of 280 hours, May maintains a near-perfect brightness, allowing residents and visitors alike to bask in the delightful warmth. As summer approaches, the sunshine hours begin to rise again, showcasing a seasonal trend where longer days make June and July equally inviting, though slightly less radiant than the height of April. With May nestled between vibrant spring and boisterous summer, it offers a perfect blend of comfortable temperatures and abundant sunshine, making it a truly enchanting month to experience the outdoors.
In Kumamoto, Japan, the likelihood of sunny weather takes a notable dip in May, with only a 27% chance of sunshine. This marks a decline from the preceding months, where April offered a slightly brighter 42% chance. As spring transitions into early summer, it's interesting to observe that despite May's limited sun, both July and August mirror its 27% sunshine probability. The trend reveals that while the early months of the year see a higher likelihood of sunny days, the chances significantly wane as the summer approaches, particularly in the heart of June, which dips to 22%. This shift hints at the onset of the rainy season, making May a somewhat unpredictable month weather-wise in Kumamoto.
As the year progresses in Kumamoto, Japan, daylight duration begins to extend notably, peaking during the vibrant month of May. From a modest 10 hours in January, daylight gradually lengthens, reaching 13 hours by May, inviting the lush beauty of spring into full bloom. This upward trend continues into the summer months, where daylight hits its zenith with 14 hours in both June and July, making these months ideal for outdoor adventures. However, as autumn approaches, the daylight hours gradually taper off, reflecting a rhythmic seasonal cycle that beautifully orchestrates the passage of time in this picturesque region. Overall, the steady increase to May marks a significant turning point, heralding longer, sunnier days that are cherished by locals and visitors alike.
In Kumamoto, Japan, the month of May brings a gentle breeze with an average wind speed of 2.5 m/s (6 mph), maintaining a consistent flow similar to the preceding months of January through April. This steady wind pattern reflects the region's mild spring climate, offering a pleasant atmosphere as temperatures begin to rise. Interestingly, the wind speeds experience a slight dip as the summer approaches, with June showing a notable decrease to 1.7 m/s (4 mph). However, the overall trend from earlier months suggests that while May's winds are calm, they set the stage for the soothing, warm days of late spring in Kumamoto, where nature flourishes and outdoor activities flourish, fueled by this moderate breeze.
Weather in Kumamoto varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Kumamoto, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January exhibit starkly contrasting weather patterns. In May, temperatures range from a minimum of 8°C (46°F) to a maximum of 28°C (83°F), with an average of 19°C (67°F). This month experiences significant rainfall, totaling 207 mm (8.1 in) over about 12 days and an average humidity level of 84%. In contrast, January is much colder, with temperatures dipping to a minimum of -3°C (27°F) and only reaching a maximum of 17°C (63°F), averaging just 6°C (44°F). Additionally, January sees less precipitation at 63 mm (2.5 in) over 8 days and has lower humidity at 75%. For more specifics on January weather, visit Kumamoto weather in January.
Comparing the weather in May and February reveals significant differences in temperature and precipitation levels. In May, temperatures range from a minimum of 8°C (46°F) to a pleasant average of 19°C (67°F), peaking at 28°C (83°F), while February experiences a chillier climate with temperatures spanning from -2°C (29°F) to an average of 7°C (45°F), with a maximum of only 19°C (66°F). Additionally, May sees higher precipitation levels, with 207 mm (8.1 in) over approximately 12 days, compared to February's 105 mm (4.2 in) across 11 days. The humidity also contrasts, standing at 84% in May versus 71% in February. For more detailed insights about February's weather in Kumamoto, visit Kumamoto weather in February.
In comparing the weather between March and May, we observe a significant shift in temperatures and precipitation patterns. May boasts a warmer climate with average temperatures soaring to 19°C (67°F) and maximums reaching 28°C (83°F), while March remains cooler with average temperatures of 11°C (52°F) and maximums of only 22°C (72°F). Additionally, May experiences higher humidity at 84%, compared to March's 71%, making it feel warmer and more humid. However, May also sees increased precipitation, with 207 mm (8.1 in) falling over 12 days, compared to March's 143 mm (5.6 in) over 14 days. For a closer look at March weather patterns, visit Kumamoto weather in March.
In comparing the weather of May and April, it's clear that May tends to be warmer and wetter. May enjoys an average temperature of 19°C (67°F), with a minimum of 8°C (46°F) and a maximum of 28°C (83°F), while April’s average is cooler at 15°C (59°F), ranging from 3°C (38°F) to a high of 26°C (79°F). Additionally, May sees more rainfall, with 207 mm (8.1 in) occurring over 12 days compared to April's 135 mm (5.3 in) over just 9 days. Humidity is also slightly higher in May at 84%, compared to 78% in April. For more detailed insights into April's weather, you can visit Kumamoto weather in April.
May and June showcase a gradual transition in weather patterns. In May, temperatures range from a minimum of 8°C (46°F) to a maximum of 28°C (83°F), offering an average temperature of 19°C (67°F). The month experiences 207 mm (8.1 in) of precipitation over 12 days, accompanied by a humidity level of 84%. In contrast, June exhibits warmer temperatures, with a minimum of 15°C (58°F) and a maximum of 30°C (87°F), averaging at 23°C (73°F). However, it also tends to be wetter, with 280 mm (11.0 in) of rainfall spread over 15 days and slightly higher humidity at 86%. For a closer look at what to expect, you can check Kumamoto weather in June.
In May, temperatures in Kumamoto range from a cool minimum of 8°C (46°F) to a pleasant average of 19°C (67°F), with maximum temperatures reaching 28°C (83°F). The month sees significant rainfall, totaling 207 mm (8.1 in) over 12 days, accompanied by a humidity level of 84%. In contrast, July experiences much warmer weather, with minimum temperatures starting at 18°C (64°F) and averaging 26°C (79°F), while highs can soar to 34°C (93°F). Rainfall is more pronounced in July, accumulating to 406 mm (16.0 in) over 17 days, and humidity also increases to 92%. For more details on the weather in July, visit Kumamoto weather in July.
May and August present distinct weather patterns, with May offering cooler temperatures, averaging around 19°C (67°F) and reaching a maximum of 28°C (83°F). In contrast, August sees a significant rise in temperatures, with averages climbing to 27°C (82°F) and peaks hitting 34°C (94°F). Precipitation levels are also noteworthy, with May receiving 207 mm (8.1 in) over 12 days, while August experiences slightly higher rainfall at 238 mm (9.4 in) across 14 days, contributing to increased humidity, which rises from 84% in May to 91% in August. For a more detailed look, you can check out the Kumamoto weather in August.
May and September present distinct contrasts in weather, showcasing the transition from spring to autumn. In May, temperatures range from a cool 8°C (46°F) to a warm 28°C (83°F), averaging at 19°C (67°F), accompanied by considerable precipitation of 207 mm (8.1 in) over 12 days, coupled with high humidity at 84%. In contrast, September boasts milder minimum temperatures of 14°C (57°F) and peaks at a warmer 34°C (93°F), averaging 24°C (76°F). Although it sees slightly less rainfall at 171 mm (6.7 in) over 14 days, the humidity remains constant at 84%, providing a different kind of warmth as summer transitions into autumn. For more detailed insights, you can check Kumamoto weather in September.
May and October in Kumamoto present distinct weather patterns, though both months share similar average temperatures around 19°C (67°F). In May, temperatures range from a cooler 8°C (46°F) to a warmer 28°C (83°F), accompanied by higher precipitation at 207 mm (8.1 in) over 12 days, resulting in humidity levels around 84%. In contrast, October sees slightly warmer minimum temperatures at 9°C (49°F) and a maximum of 30°C (87°F), with significantly less rainfall of 117 mm (4.6 in) over 9 days and a humidity level of 83%. For more details on October weather, you can check Kumamoto weather in October.
May and November present distinctly different weather patterns. In May, temperatures range from a minimum of 8°C (46°F) to a maximum of 28°C (83°F), with an average of 19°C (67°F). This month sees considerable rainfall, with a total of 207 mm (8.1 in) over approximately 12 days, and a high humidity level of 84%. In contrast, November experiences cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 24°C (76°F), averaging around 13°C (56°F). The rainfall in November is also less intense, totaling 76 mm (3.0 in) across about 9 days, accompanied by a slightly lower humidity of 81%. For more details on November weather, you can refer to Kumamoto weather in November.
In May, the weather is significantly warmer, with average temperatures reaching 19°C (67°F) and highs peaking at 28°C (83°F), making it a vibrant month characterized by lush greenery. However, it also brings considerable rainfall, with 207 mm (8.1 in) over approximately 12 days, and a high humidity level of 84%, contributing to a muggy atmosphere.
In contrast, December experiences much cooler temperatures, with averages around 8°C (47°F) and maximums of 22°C (71°F). The precipitation drops to 84 mm (3.3 in) across 9 days, complemented by a lower humidity level of 79%, resulting in a generally drier and crisper climate. For more details about December weather, you can check Kumamoto weather in December.
May in Kumamoto welcomes a delightful shift in climate, with temperatures rising to a pleasant average while humidity peaks, creating a lush and vibrant atmosphere. Although the city experiences significant rainfall, with numerous days of precipitation, these showers often contribute to the beauty of its landscapes, contrasting sharply with the drier months that precede and follow. As nature bursts into bloom, May stands out as a perfect time for outdoor activities—ideal for exploring the region's stunning sights. For a deeper dive into what Kumamoto's diverse climate has to offer year-round, visit Kumamoto Climate.