Last updated: August 21, 2025
May in Yamagata, Japan, presents a vibrant blend of weather characteristics that capture the essence of spring. With maximum temperatures reaching up to 30°C (87°F) and an average landing at a comfortable 18°C (65°F), the month is marked by warmth and light. However, the minimum temperature can dip to a cool 5°C (42°F), reminding residents that spring can still bring a chill. Precipitation is significant, with an average of 229 mm (9.0 in) spread over 12 days, contributing to lush landscapes and vibrant blooms. The humidity levels sit at a high 83%, creating a rich, almost tropical atmosphere perfect for enjoying the beauty of nature in full bloom.
In May, Yamagata, Japan, experiences a delightful transition as temperatures rise significantly, with a minimum of 5°C (42°F) and an average of 18°C (65°F), reaching a pleasant maximum of 30°C (87°F). This month marks a shift from the chilly embrace of early spring to the warmth of early summer, as the region shakes off the last remnants of winter. With each passing week, the increasing warmth invites outdoor activities and the blooming of vibrant flora, making May an ideal time to explore the stunning landscapes of Yamagata. The steady rise in temperatures reflects a broader trend of seasonal change, promising warmer days ahead while still maintaining a refreshing coolness in the evenings for those who enjoy a brisk stroll or a cozy gathering under the stars.
In May, Yamagata experiences a significant uptick in precipitation, with 229 mm (9.0 in) of rain falling over 12 days. This amount marks a continuation of the upward trend seen from the previous months, where March and April also recorded substantial rainfall, culminating in May's impressive totals. As spring transitions to early summer, the rainfall begins to intensify, setting the stage for the upcoming wet season. The region's lush landscapes thrive under this deluge, showcasing vibrant greens that characterize Yamagata's beauty during this time of year. While May's precipitation is slightly less than the 245 mm expected in June, the steady accumulation throughout spring undoubtedly contributes to the area's rich flora and overall ecological health.
In Yamagata, Japan, May ushers in a notable rise in humidity, reaching 83%—a slight increase from April's 76%. This month acts as a bridge to the sweltering summer months, where humidity levels escalate dramatically, peaking at 93% in July. The trend showcases a gradual climb from the winter months, starting at a chilly 82% in January, and although the humidity dips slightly in March, it quickly resurfaces to higher levels as spring progresses. By May, the air gains a lush, moist quality, hinting at the impending heat and life that summer brings, while maintaining a consistent feel with the earlier months of the year. Thus, May embodies a transitional phase, setting the stage for the humid dynamics of the warmer season ahead.
As the warmer months approach in Yamagata, Japan, the UV Index experiences a significant rise, with May showcasing an extreme UV Index of 11 and a notably short burn time of just 10 minutes. This trend indicates the importance of sun protection during early summer, as the exposure category escalates from very high in April to extreme levels in May. Following this pattern, June through August maintains the same level of extreme UV exposure, highlighting a consistent need for vigilance against harmful UV rays during these months. Transitioning into September, the index slightly decreases to 10, signaling that while the sun’s intensity is still considerable, it begins to taper off into the fall. It's crucial for residents and visitors alike to stay informed and prepared; for more detailed information, visit the Yamagata UV Index.
UV Risk Categories
May in Yamagata, Japan, is a delightful month basking in 295 hours of sunshine, marking a peak in the spring season. This bright increase follows a steady ascent from 181 hours in January to nearly 300 hours in August. As the days grow longer, residents and visitors alike can savor the vibrant landscapes transformed by the warm sun. The notable rise from 280 hours in April to May’s sunshine showcases the region's gradual awakening and invites outdoor festivities, reflecting the heart of spring. As summer approaches, the sunshine hours do dip slightly in June and beyond, hinting at the seasonal transitions ahead, but May stands out as a golden bridge between the blooming beauty of spring and the vibrant days of summer.
In Yamagata, Japan, the likelihood of encountering sunny weather reaches its peak in the late autumn and early winter months, with October and November boasting impressive chances of sunshine at 58% and 59%, respectively. As spring unfolds, the transition towards sunnier days is palpable; however, May presents a notable dip in sunny prospects, with only a 28% chance of clear skies. This trend marks a significant decrease from the preceding months, particularly April, which enjoys a more favorable 47% sunshine rate. Although summer starts to roll in, it too is met with a decrease in sunny conditions, as evidenced by the 24% chance in June and the 32% in July. Overall, while Yamagata offers a tapestry of seasonal weather, May tends to be less reliable for sunlight, urging residents and visitors to plan accordingly.
In Yamagata, Japan, daylight duration experiences a captivating transformation throughout the year. Beginning with 10 hours of daylight in the depths of winter, the days gradually lengthen, embodying the arrival of spring. By April, daylight increases to 13 hours, marking a vibrant shift in the season. As May arrives, the days reach their peak at 14 hours, inviting residents to indulge in outdoor activities under the warm sun. This extended daylight continues into June and July, before gently receding as summer transitions into autumn. By September, daylight begins to shorten once again, dwindling to 12 hours, and continuing this decline through the colder months. The cycle of light in Yamagata beautifully reflects nature's rhythm, offering a consistent yet dynamic experience of day and night.
In Yamagata, Japan, May experiences a gentle drop in wind speed, averaging 2.4 m/s (5 mph), slightly lower than the preceding months of March and April. This decline contrasts with the upward trend seen in the early spring, where gusts reached a peak in March at 2.9 m/s (7 mph). As spring transitions to summer, the winds continue to ease, culminating in June's soft breeze of 1.9 m/s (4 mph). This gradual reduction suggests a calmness settling over the landscape as the vibrant colors of May bloom, creating a serene atmosphere well-suited for outdoor activities and exploration. Overall, the month encapsulates a shift towards quieter days, reflecting the tranquil essence of Yamagata in late spring.
Weather in Yamagata varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Yamagata, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present two contrasting weather profiles. In May, temperatures range from a chilly 5°C (42°F) at night to a warm average of 18°C (65°F), peaking at 30°C (87°F) during the day. This month also experiences significant rainfall, with 229 mm (9.0 in) spread over about 12 days, accompanied by high humidity levels of 83%. In stark contrast, January is much colder, featuring temperatures that can drop to -8°C (18°F), with an average of only 4°C (39°F) and a maximum of 16°C (60°F). While January has less precipitation at 71 mm (2.8 in) over 11 days, the humidity is slightly lower at 82%. For a closer look at the January weather in Yamagata, you can visit Yamagata weather in January.
May and February present starkly contrasting weather conditions. In May, temperatures range from a chilly 5°C (42°F) at night to a warm 30°C (87°F) during the day, with an average temperature of 18°C (65°F). The month is quite wet, receiving 229 mm (9.0 in) of precipitation over 12 days, while humidity levels remain high at 83%. In contrast, February experiences much colder weather, with temperatures dropping to -7°C (20°F) at night and peaking at 20°C (68°F) during the day, leading to a lower average of 4°C (40°F). The precipitation in February is significantly less, at 79 mm (3.1 in) over 9 days, and humidity is slightly lower at 79%. For those interested in further details, you can check out Yamagata weather in February.
In comparing the weather between March and May, March tends to be cooler, with temperatures ranging from a minimum of -1°C (31°F) to a maximum of 23°C (74°F), while May offers a more pleasant experience with temperatures varying from 5°C (42°F) to 30°C (87°F). Additionally, May sees a higher amount of precipitation, averaging 229 mm (9.0 in) over 12 days compared to March's 179 mm (7.1 in) across 13 days. Humidity levels also climb in May, hitting 83%, compared to March's more moderate 74%. For a more detailed look at March weather, you can check Yamagata weather in March.
In comparing the weather between April and May, we see notable differences in temperature and humidity. While April experiences a minimum temperature of 0°C (32°F) and an average of 13°C (56°F), May shows a significant increase, with minimums at 5°C (42°F) and an average temperature of 18°C (65°F). The maximum temperatures also rise, with April reaching 27°C (82°F) compared to May's peak of 30°C (87°F). Additionally, while both months have approximately 12 days of precipitation, May has slightly higher rainfall at 229 mm (9.0 in) versus April's 223 mm (8.8 in). Humidity levels also increase in May to 83%, compared to April's 76%. For more details, check out Yamagata weather in April.
In comparing the weather of May and June, we can see a noticeable shift in temperatures and humidity levels. May typically experiences a minimum temperature of 5°C (42°F) and an average of 18°C (65°F), while June offers warmer averages with a minimum of 12°C (53°F) and an average of 22°C (71°F). Both months have a similar maximum temperature, with June peaking slightly higher at 31°C (89°F) compared to May’s 30°C (87°F). Precipitation also sees a slight increase, with May recording 229 mm (9.0 in) over 12 days and June totaling 245 mm (9.7 in) over 13 days. Humidity rises marginally in June to 87%, compared to May’s 83%. For a more detailed look at June's weather, check out Yamagata weather in June.
In May, the weather in Yamagata is marked by a mild temperature range, with minimums around 5°C and maximums reaching up to 30°C. The average temperature sits at a comfortable 18°C, but the high precipitation of 229 mm over 12 rainy days, coupled with a humidity level of 83%, suggests frequent bouts of rain. In contrast, July experiences significantly warmer conditions, with temperatures ranging from a minimum of 18°C to a scorching maximum of 37°C and an average of 26°C. The month also sees an increase in rain, totaling 493 mm over 22 days, making it one of the wettest months, with humidity rising to 93%. For a more detailed look at the weather specifics, you can visit Yamagata weather in July.
In May, the weather in Yamagata presents a mild climate with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 30°C (87°F), resulting in an average of 18°C (65°F). Although May experiences lower humidity at 83%, it corresponds with significant precipitation, totaling 229 mm (9.0 in) over 12 days. In contrast, August brings much warmer conditions, with temperatures soaring from a minimum of 18°C (64°F) to a high of 38°C (100°F), yielding an average of 27°C (82°F). This summer month also sees an increase in precipitation, with 322 mm (12.7 in) across 18 days, as humidity rises to 91%. For more detailed insights on August weather, see Yamagata weather in August.
May and September exhibit distinct weather patterns, highlighting the transition between spring and fall. In May, temperatures range from a minimum of 5°C (42°F) to a maximum of 30°C (87°F), with an average temperature of 18°C (65°F). The month experiences significant rainfall with 229 mm (9.0 in) over 12 days, and humidity levels are relatively high at 83%. In contrast, September sees warmer conditions, with minimum temperatures starting at 12°C (54°F) and peaking at 35°C (95°F), averaging 23°C (74°F). However, it is also rainier, with precipitation totaling 298 mm (11.7 in) spread across 16 days, along with slightly higher humidity at 87%. For more detailed information, you can check Yamagata weather in September.
May and October share similar average temperatures, both hovering around 18°C (64°F), but October tends to be slightly cooler, particularly in the minimum temperatures, which range from 6°C (43°F) compared to May's 5°C (42°F). Both months experience comparable maximum temperatures, with October reaching up to 31°C (88°F) and May peaking at 30°C (87°F). However, October has a marginally higher level of precipitation, with 234 mm (9.2 in) over 14 days, while May accounts for 229 mm (9.0 in) across 12 days, leading to slightly increased humidity levels in October at 85%, versus May's 83%. For more specifics on October weather patterns, check out Yamagata weather in October.
In comparing the weather between May and November, we see distinct differences characteristic of the transitional seasons. May enjoys warmer temperatures, with a minimum of 5°C (42°F) and an average high of 30°C (87°F), making it much more pleasant for outdoor activities. However, it also experiences higher precipitation, totaling 229 mm (9.0 in) over 12 days, alongside consistent humidity at 83%.
In contrast, November is cooler, with temperatures ranging from a minimum of 1°C (33°F) to a maximum of 22°C (72°F), resulting in a much milder average of 12°C (53°F). The precipitation is significantly lower at 74 mm (2.9 in) over just 7 days, though the humidity remains the same at 83%. For more details, you can check out Yamagata weather in November.
In May, the weather is generally warm and pleasant, with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 30°C (87°F), and an average of 18°C (65°F). This month experiences a significant amount of precipitation, totaling 229 mm (9.0 in) over approximately 12 days, accompanied by a high humidity level of 83%. In contrast, December brings much colder conditions, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 18°C (65°F), averaging 6°C (43°F). Precipitation is lower, at 94 mm (3.7 in) over the same 12 days, but humidity remains constant at 83%. For a more detailed look at December weather, check Yamagata weather in December.
As May unfolds in Yamagata, the weather begins to embrace a warmth that starkly contrasts with the cooler, chillier months preceding it. The average temperature rises, allowing residents and visitors alike to enjoy more outdoor activities amidst the lush spring landscapes. However, with an increase in warmth comes a notable rise in humidity, creating a humid atmosphere that can feel quite different from the crisp air of early spring. Precipitation, while still a factor, tends to be scattered over the month, contributing to the region's vibrant greenery. Overall, May serves as a transition to the warmth of summer, making it a delightful time to experience the beauty of Yamagata. For a deeper dive into the region's weather patterns, check out Yamagata Climate.