Last updated: August 21, 2025
June in Kumamoto, Japan is characterized by warm temperatures and high humidity, making it a vibrant start to the summer season. Daily maximum temperatures hover around 30°C (87°F), with an average of 23°C (73°F), bringing pleasant warmth to the region. However, the month also sees significant rainfall, with approximately 280 mm (11.0 in) spread over 15 days, so be prepared for frequent showers. The humidity is notably high at 86%, creating a lush, green landscape that is both refreshing and invigorating. These conditions together paint a picture of a lively June, perfect for experiencing the natural beauty and cultural richness of Kumamoto.
In Kumamoto, Japan, the month of June ushers in a notable transition towards warmer weather, with temperatures climbing significantly. Daily lows average around 15°C (58°F), providing pleasant evenings, while average highs reach a balmy 30°C (87°F), making it the perfect time to explore the city's stunning gardens and historic sites. The overall average of 23°C (73°F) hints at the burgeoning summer, setting the stage for even hotter days ahead in July and August. This marked increase in warmth, paired with the lush green landscapes brought on by the onset of the rainy season, enhances Kumamoto's natural beauty, encouraging both locals and visitors to embrace the vibrant outdoor atmosphere.
In June, Kumamoto experiences a notable surge in precipitation, with a substantial 280 mm (11.0 in) over approximately 15 days. This marks a significant increase from the earlier months, encapsulating the transition into the region's wet season. Following a relatively dry January through April, where rainfall averages hovered around 135 mm, May already hinted at this upward trend with 207 mm. The June rains pave the way for the even heavier deluge that follows in July, with a staggering 406 mm anticipated. As the summer months unfold, Kumamoto's rainfall patterns reflect a rhythm of increasing moisture, setting the stage for the lush landscapes that characterize the Japanese rainy season.
June marks the onset of high humidity in Kumamoto, Japan, where the average humidity reaches an impressive 86%. This increase is part of a noticeable trend, as humidity steadily rises from 75% in January to 84% in May, before peaking in June. Following this month, the humidity remains elevated, reaching its peak in July at 92%. This gradual climb and subsequent plateau illustrate the humid subtropical climate's influence, providing a lush backdrop that characterizes Kumamoto's vibrant summer landscape. As residents brace for the steamy months ahead, the humid conditions become a defining feature of the season, setting the stage for lively greenery and a rich sensory experience.
In June, Kumamoto, Japan experiences an extreme UV Index of 12, making it crucial for residents and visitors alike to take sun safety seriously, with a burn time of just 10 minutes. This marks a continuation of the high UV levels seen in May, emphasizing a trend of increasing sun exposure as summer approaches. Notably, both June and July maintain this intense UV rating, reinforcing the need for protective measures. As we look back, the UV Index climbed steadily from a moderate level of 5 in January to this peak, highlighting the increasing intensity of solar radiation in the months leading up to mid-summer. With such conditions, ensuring adequate skin protection is essential in coping with the cumulative effects of UV exposure—check out more details at Kumamoto UV Index.
UV Risk Categories
As June arrives in Kumamoto, Japan, it brings with it a delightful tapestry of sunlight, boasting 248 hours of radiant light. This month signals a gentle decline from the peak of May, where sunshine basked the city with 279 hours. Compared to the early months of the year, June shines brighter than January's meager 188 hours, yet slightly dims in intensity by July. It's a transitional period, as the days grow warmer and longer, moving from the vibrant blooms of spring into the warm embrace of summer. With July expected to ramp up to 260 hours of sunlight, June serves as a beautiful bridge, reminding us of nature's evolving rhythms and the promise of brighter days ahead.
As June arrives in Kumamoto, Japan, the likelihood of sunny weather takes a noticeable dip, dropping to just 22%. This trend marks a significant decline from the sunnier months of April and May, where the chances hovered around the low 40s. Following June, the probability of sunshine remains modest through July, further decreasing to 19%, before gradually picking up again in the later months, particularly October, which boasts a more promising 63% chance of clear skies. Thus, while June may not be the most favorable for sun seekers, the seasonal ebb and flow of Kumamoto's weather suggests brighter days ahead as summer unfolds.
In Kumamoto, Japan, the month of June ushers in a delightful increase in daylight duration, peaking at 14 hours—a trend that mirrors the gradual elongation of days leading up to summer. Starting from 10 hours in January and steadily climbing to 14 hours in both June and July, the daylight hours create an inviting atmosphere for outdoor activities. Following this peak, the daylight begins to taper off, highlighting a seasonal rhythm where May’s 13 hours prepares residents for the bright days of summer and the subsequent transition into shorter days that herald autumn. Overall, June stands out as a vibrant midpoint in Kumamoto's yearly cycle, offering ample sunlight for enjoyment and exploration.
In June, the winds in Kumamoto, Japan, take on a gentler demeanor, recording an average speed of just 1.7 m/s (4 mph)—the calmest of the year. This decline in wind speed compared to the preceding months signifies a shift into the heart of summer, where the air becomes more still and the days grow warmer. While the wind picks up again in July, the serene atmosphere of June invites a reflective pause, offering residents and visitors alike a chance to enjoy the tranquil beauty that accompanies the approach of the summer season. The transition from May's mild breezes to June's soft whispers sets a peaceful backdrop for long afternoons and warm evenings, highlighting the unique seasonal rhythms of Kumamoto's climate.
Weather in Kumamoto varies notably across the year, with each month offering distinct climate conditions. This page compares June’s weather to other months in Kumamoto, focusing on differences in temperature, rainfall, humidity, and UV levels.
June and January present starkly contrasting weather conditions. In June, temperatures range from a mild 15°C (58°F) to a warm 30°C (87°F), with an average of 23°C (73°F). The month experiences significant precipitation, totaling 280 mm (11.0 in) over about 15 days, accompanied by high humidity at 86%. In contrast, January is much colder, with temperatures varying from a frigid -3°C (27°F) to a maximum of 17°C (63°F) and an average of only 6°C (44°F). The precipitation in January is considerably less, at 63 mm (2.5 in) over just 8 days, with a lower humidity of 75%. For more detailed information about January weather, you can visit Kumamoto weather in January.
June boasts significantly warmer temperatures compared to February, with minimums around 15°C (58°F) and maximums reaching 30°C (87°F), while February experiences much cooler conditions, ranging from a minimum of -2°C (29°F) to a maximum of 19°C (66°F). Additionally, June is characterized by high humidity levels at 86% and substantial precipitation of 280 mm (11.0 in) over 15 days, making it a notably wetter month. In contrast, February has lower humidity at 71% and receives less rainfall, totaling 105 mm (4.2 in) across 11 days. For more specific insights into February weather, you can check out Kumamoto weather in February.
In comparing the weather between June and March, June is noticeably warmer with an average temperature of 23°C (73°F) compared to March's cooler average of 11°C (52°F). While both months experience a similar number of rainy days—15 in June and 14 in March—June receives significantly more precipitation, totaling 280 mm (11.0 in) versus March's 143 mm (5.6 in). Additionally, June has a much higher humidity level at 86%, making it feel more sultry compared to the 71% humidity seen in March. For more detailed information on March weather, you can check out Kumamoto weather in March.
The weather in June is significantly warmer than in April, with average temperatures rising from 15°C (59°F) in April to a more summery 23°C (73°F) in June. While April enjoys pleasant days with maximum temperatures reaching 26°C (79°F), June can be quite hot, peaking at 30°C (87°F). However, June also brings heavier rainfall, totaling 280 mm (11.0 in) over approximately 15 days, compared to the more moderate 135 mm (5.3 in) over 9 days in April. Humidity levels are higher in June at 86%, making the air feel much more humid than the 78% experienced in April. For more detailed insights, you can check Kumamoto weather in April.
In comparing the weather of June and May, June experiences generally warmer temperatures, with a minimum of 15°C (58°F) and an average of 23°C (73°F), compared to May's cooler minimum of 8°C (46°F) and average of 19°C (67°F). Additionally, June reaches higher maximum temperatures, peaking at 30°C (87°F), while May's maximum is 28°C (83°F). However, June is notably wetter, with 280 mm (11.0 in) of precipitation spread over 15 days, compared to May's 207 mm (8.1 in) over 12 days. Humidity levels remain quite similar, with June at 86% and May at 84%. For more details on May weather, you can visit Kumamoto weather in May.
June and July exhibit distinct weather patterns, marking a transition into the hotter and more humid summer months. In June, the temperatures range from a minimum of 15°C (58°F) to a maximum of 30°C (87°F), with an average of 23°C (73°F). The month also sees substantial rainfall, totaling 280 mm (11.0 in) across 15 days, contributing to a high humidity level of 86%. In contrast, July experiences warmer temperatures, with minimums reaching 18°C (64°F) and maximums peaking at 34°C (93°F), averaging 26°C (79°F). However, the month is also wetter, as it receives 406 mm (16.0 in) of precipitation over 17 days, resulting in even higher humidity at 92%. For a more detailed look at July's weather, you can refer to Kumamoto weather in July.
June and August differ significantly in weather characteristics. In June, temperatures range from a minimum of 15°C (58°F) to a maximum of 30°C (87°F), with an average of 23°C (73°F). The month experiences considerable rainfall, totaling 280 mm (11.0 in) over 15 days, and the humidity is quite high at 86%. In contrast, August is generally warmer, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 34°C (94°F), and an average of 27°C (82°F). While August sees slightly less rainfall at 238 mm (9.4 in) over 14 days, the humidity rises to 91%. For more detailed insights on the weather in August, you can check Kumamoto weather in August.
June and September in Kumamoto exhibit distinct weather patterns. June typically sees a range of temperatures from a minimum of 15°C (58°F) to a maximum of 30°C (87°F), with an average temperature of 23°C (73°F). It is a relatively wet month, receiving about 280 mm (11.0 in) of precipitation over 15 days, accompanied by high humidity levels around 86%. In contrast, September brings slightly cooler temperatures, with a minimum of 14°C (57°F) and a maximum of 34°C (93°F), while maintaining an average of 24°C (76°F). Precipitation decreases to 171 mm (6.7 in) over approximately 14 days, and humidity is slightly lower at 84%. This comparison highlights how June tends to be more humid and wetter than September. For more details, you can check Kumamoto weather in September.
June and October present distinct weather patterns, highlighting the transition from early summer to autumn. In June, temperatures are generally warmer, with minimums around 15°C (58°F) and average highs reaching up to 30°C (87°F). However, this month is also characterized by high humidity at 86% and significant rainfall, totaling 280 mm (11.0 in) over approximately 15 days.
In contrast, October experiences cooler temperatures, with minimums dropping to 9°C (49°F) and average highs remaining at 30°C (87°F). Precipitation is significantly reduced to 117 mm (4.6 in) over about 9 days, and humidity is slightly lower at 83%. For more detailed information about the weather in October, you can check Kumamoto weather in October.
June and November present contrasting weather, distinctly reflecting the shift from late spring to late autumn. In June, the temperatures range from a minimum of 15°C (58°F) to a maximum of 30°C (87°F), with an average of 23°C (73°F). This month also sees significant rainfall, totaling 280 mm (11.0 in) over approximately 15 days, contributing to a humid environment with levels around 86%.
In contrast, November offers cooler temperatures, with minimums dropping to 2°C (36°F) and maximums reaching 24°C (76°F), averaging only 13°C (56°F). Rainfall is considerably less during this month, accounting for just 76 mm (3.0 in) over 9 days, and humidity levels decrease slightly to 81%. For more details on the specific conditions of November, you can check Kumamoto weather in November.
June and December present contrasting weather experiences. In June, temperatures typically range from a minimum of 15°C (58°F) to a maximum of 30°C (87°F), with an average of 23°C (73°F). This month is characterized by high humidity at 86% and substantial rainfall, totaling 280 mm (11.0 in) over about 15 days. In stark contrast, December sees much cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 22°C (71°F), averaging only 8°C (47°F). Precipitation is also significantly lower at 84 mm (3.3 in) over approximately 9 days, and humidity settles at a more comfortable 79%. For more details, you can check Kumamoto weather in December.
As June unfolds in Kumamoto, the weather presents a stark contrast to the drier, cooler months preceding it. With increased humidity at 86% and frequent rainfall, this month marks a shift towards a more tropical climate, characterized by warmer temperatures that range from mild nights to hot days. The average temperature sits at a comfortable 23°C, but it can soar to 30°C during the day, making it a vibrant time for lush greenery. However, be prepared for the occasional downpour—with about 15 days of rain totaling around 280 mm, it's wise to carry an umbrella. To better understand how Kumamoto's weather evolves throughout the year, check out the detailed insights at Kumamoto Climate.