Last updated: August 21, 2025
In Yamaguchi, Japan, May unveils a delightful transition into warmer weather, with a maximum temperature reaching a pleasant 30°C (87°F) while the average hovers around 19°C (67°F). This month, however, also brings with it a noticeable minimum temperature of 5°C (42°F), highlighting cooler nights. With a total precipitation of 136 mm (5.4 in) over 11 days, the region experiences a significant amount of rain, contributing to an humidity level of 84% that enhances the lushness of its vibrant landscapes. Overall, May in Yamaguchi is a month of dynamic weather, perfect for enjoying the natural beauty that emerges from both sunshine and rain.
May in Yamaguchi, Japan, marks a delightful transition into warmer weather, with temperatures rising steadily from the chilly remnants of winter. The month opens with a comfortable minimum of 5°C (42°F), while the average temperature climbs to an inviting 19°C (67°F), making it a perfect time for outdoor adventures. As the days progress, the warmth peaks at a maximum of 30°C (87°F), offering ample sunshine and opportunities to enjoy the blossoming landscapes. This notable shift from the cooler April weather, which averages around 14°C (58°F), showcases May as a month of vibrant change, setting the stage for the summer heat that follows in June. With pleasant days and mild evenings, May truly embodies the beauty of spring in Yamaguchi, inviting both residents and visitors to relish in its warmth.
May in Yamaguchi, Japan, greets residents with a notable increase in precipitation, registering 136 mm (5.4 in) over 11 days. This marks a gradual rise from the preceding months; April's rainfall of 122 mm (4.8 in) laid the groundwork for May's wet embrace. It's a pivotal time as the region transitions towards the summer monsoon season. The consistent pattern indicates that as spring matures, Yamaguchi experiences not only increased rainfall but also a step up in the frequency of precipitation days, setting the stage for the more intense downpours that follow in June and July. Overall, May's rainfall is a reminder of nature’s rhythm, balancing sunny days with refreshing showers as the landscape shifts into vibrant growth.
As spring transitions into summer, May in Yamaguchi sees a noticeable spike in humidity, reaching a significant 84%. This marks one of the highest points of the year, reflecting the region's shift towards a more tropical climate. The humidity steadily climbed from 75% in April, a sign of the approaching heat that will peak in the following months. Interestingly, this gradual increase from the drier winter months—where January and February recorded 76% and 72% respectively—highlights how Yamaguchi's weather patterns evolve with the seasons, ultimately leading to a 90%+ humidity in the sweltering July and August. As May arrives, residents can expect a sultry atmosphere, making it a vibrant precursor to the humid summer ahead.
In May, Yamaguchi experiences an extreme UV Index of 11, consistent with the high levels seen in April and the following month of June. This substantial UV radiation translates to a burn time of just 10 minutes, urging residents and visitors to prioritize sun protection. The trend from earlier months indicates a significant shift from moderate to extreme UV exposure as the warmer season sets in, highlighting the importance of staying vigilant against skin damage. As temperatures rise, it’s crucial to be aware of these conditions and take necessary precautions. For more details, visit Yamaguchi UV Index.
UV Risk Categories
In Yamaguchi, Japan, the month of May shines brightly with an impressive 300 hours of sunshine, marking it as one of the sunniest months of the year. Following the steady upward trend from January through April, when sunshine hours gradually increase from 174 to 280, May represents a peak before the summer swelter. Interestingly, August surpasses May with 303 hours, but the month before marks the transition into the often sultry summer. The gradual rise of spring sunshine hints at the vibrant beauty of nature awakening in this picturesque region, inviting residents and visitors alike to bask in the burgeoning warmth.
As spring transitions into summer, the chances of sunny weather in Yamaguchi, Japan, show an intriguing pattern. May, while basking in the mild warmth of approaching summer, presents a 31% chance of sunny days, notably lower than the preceding months of April (47%) and March (37%). This suggests a tendency for cloudier days as the region heads into the summer months, peaking with the lowest likelihood of sun in July at 22%. However, this dip in sunshine is soon offset by the more favorable conditions seen in October, where the likelihood of sunny weather rebounds to a striking 58%. Thus, while May may not be the sun-soaked delight one might hope for, the cyclical nature of Yamaguchi’s weather hints at brighter days ahead as the year progresses.
In Yamaguchi, Japan, the daylight duration experiences a captivating shift throughout the year. Starting the year with a steady 10 hours of daylight in both January and February, the days gradually lengthen, with March seeing an increase to 11 hours. The real transformation arrives in April and May, where daylight peaks at 13 hours, enticing residents outdoors as nature awakens. As summer approaches, June and July offer the longest days of the year with a delightful 14 hours each, perfect for enjoying the region’s vibrant landscapes. The trend shifts again as August signals a gradual descent back to 13 hours, followed by a slow taper to 12 hours in September. By the time autumn rolls around, daylight dwindles, leading to 11 hours in October, and eventually, the year concludes with diminishing light, dipping down to just 9 hours in December. This rhythmic cycle of daylight shapes the seasonal activities and lifestyle of those in Yamaguchi.
In Yamaguchi, Japan, the winds of May bring a gentle transition, with an average speed of 2.9 m/s (7 mph), slightly calmer than the months preceding it. As spring moves towards summer, the winds generally begin to lose their vigor, continuing a trend observed from April's breezy 3.2 m/s. This gradual decline, peaking in July at a more languid 2.2 m/s, reveals a pattern where the early months enjoy more spirited gusts before yielding to the stillness of summer. By observing these fluctuations, one can appreciate how May serves as a bridge, blending the refreshing breezes of spring with the warm embrace of the forthcoming summer.
Weather in Yamaguchi varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Yamaguchi, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present stark contrasts in weather. In May, temperatures range from a mild 5°C (42°F) at night to a warm 30°C (87°F) during the day, with an average of 19°C (67°F). This month also sees a higher level of precipitation, totaling 136 mm (5.4 in) over approximately 11 days, along with elevated humidity at 84%. In contrast, January features much cooler temperatures, with a low of -4°C (25°F) and a maximum of 16°C (60°F), averaging only 5°C (42°F). Additionally, January experiences less precipitation at 58 mm (2.3 in) over 9 days, along with lower humidity at 76%. For more specific details on January weather, visit Yamaguchi weather in January.
May and February present significantly different weather patterns. 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 19°C (67°F). The month also experiences higher humidity at 84% and more precipitation, totaling 136 mm (5.4 in) over 11 days. In contrast, February has a much cooler climate, with temperatures dipping as low as -3°C (27°F) and peaking at 22°C (71°F), resulting in an average of 6°C (43°F). February experiences less precipitation, about 78 mm (3.1 in) over 9 days, and lower humidity at 72%. For more information on February weather specifics, visit Yamaguchi weather in February.
In comparing the weather of May and March, we can observe notable differences in temperature and humidity levels. May features a broader temperature range, with average highs reaching 19°C (67°F) and max temperatures peaking at 30°C (87°F), contrasted with March's average of 10°C (51°F) and maximum of 22°C (72°F). Additionally, May experiences higher humidity at 84%, compared to March's 69%. Precipitation levels are similar, with May receiving 136 mm (5.4 in) over 11 days and March slightly less at 130 mm (5.1 in) over 12 days. For more detailed information, you can check Yamaguchi weather in March.
In comparing the weather of April and May, May typically experiences warmer temperatures, with averages reaching up to 19°C (67°F) and a maximum of 30°C (87°F), in contrast to April's maximum of 26°C (79°F) and average of 14°C (58°F). While both months see a fair amount of precipitation, May records slightly higher rainfall at 136 mm (5.4 in) over 11 days, compared to April's 122 mm (4.8 in) over 10 days. Additionally, May tends to be more humid, with a humidity level of 84% compared to April's 75%. For a more detailed perspective on April's weather, you can visit Yamaguchi weather in April.
May and June exhibit notable differences in weather conditions. In May, temperatures range from a cooler minimum of 5°C (42°F) to a comfortable average of 19°C (67°F), reaching a peak of 30°C (87°F). The month also sees around 136 mm (5.4 in) of precipitation over 11 days, with humidity levels at 84%. In contrast, June brings warmer temperatures, with a minimum of 12°C (54°F) and an average of 22°C (73°F), peaking at 31°C (89°F). However, it also experiences increased precipitation of 198 mm (7.8 in) over 13 days, accompanied by slightly higher humidity at 88%. For more detailed information, you can refer to Yamaguchi weather in June.
In comparing the weather between May and July, May offers a milder temperature range with minimums of 5°C (42°F) and maximums of 30°C (87°F), averaging around 19°C (67°F). It also experiences significant precipitation with 136 mm (5.4 in) over 11 days and a humidity level of 84%. In contrast, July brings much warmer temperatures, with minimums of 17°C (63°F) and maximums soaring to 37°C (99°F), averaging at 26°C (80°F). Notably, July sees a dramatic increase in rainfall, totaling 340 mm (13.4 in) over 20 days and heightened humidity levels at 95%. For more detailed information, you can check Yamaguchi weather in July.
May and August present distinctly different weather patterns. In May, temperatures range from a cool 5°C (42°F) at night to a pleasant average of 19°C (67°F) during the day, with a maximum of 30°C (87°F). However, this month experiences significant rainfall, with 136 mm (5.4 in) over 11 days and a relative humidity of 84%. In contrast, August is considerably warmer, with temperatures starting at 19°C (66°F) at night, peaking at a scorching 38°C (100°F) during the day, and an average of 28°C (83°F). This month also sees a higher precipitation level of 265 mm (10.4 in) spread across 15 days, accompanied by increased humidity at 93%. For more details, you can check out Yamaguchi weather in August.
May and September offer distinct weather experiences, reflecting the transition from spring to early autumn. In May, temperatures range from a cool 5°C (42°F) to a warm 30°C (87°F), with an average of 19°C (67°F). However, this month also brings 136 mm (5.4 in) of precipitation over about 11 days, accompanied by high humidity at 84%. In contrast, September enjoys milder temperatures, with a minimum of 13°C (56°F), an average of 24°C (75°F), and a maximum of 35°C (95°F). However, it is wetter than May, receiving 240 mm (9.4 in) of rain over 14 days, while maintaining the same humidity level of 84%. For more detailed weather information for September, you can visit Yamaguchi weather in September.
In May, the weather typically ranges from a minimum of 5°C (42°F) to a maximum of 30°C (87°F), with an average temperature of 19°C (67°F). This month experiences considerable rainfall, with around 136 mm (5.4 in) over approximately 11 days, accompanied by high humidity at 84%.
In contrast, October shows a slightly warmer minimum temperature of 8°C (46°F) and maintains the same maximum temperature of 30°C (87°F), with an average of 19°C (66°F). The precipitation decreases to 120 mm (4.7 in) over 10 days, and humidity drops to 79%.
For those interested in specific weather details for October, you can find more information at Yamaguchi weather in October.
May and November showcase distinct weather patterns in Yamaguchi. In May, temperatures range from a chilly minimum of 5°C (42°F) to a warm average of 19°C (67°F), peaking at a sweltering 30°C (87°F). This month also sees significant rainfall with about 136 mm (5.4 in) over 11 days, adding to the humidity, which averages around 84%. In contrast, November brings cooler conditions, with temperatures dropping to a minimum of 0°C (32°F) and peaking at a maximum of 25°C (78°F), averaging only 13°C (55°F). Additionally, November experiences less rainfall at 41 mm (1.6 in) spread over just 5 days, resulting in lower humidity levels at 76%. For more details on November weather, you can check Yamaguchi weather in November.
May and December exhibit stark contrasts in weather conditions. In May, temperatures range from a minimum of 5°C (42°F) to a maximum of 30°C (87°F), with an average of 19°C (67°F), making it a much warmer month overall. Additionally, May experiences higher humidity at 84% and more rainfall, totaling 136 mm over 11 days. In contrast, December sees cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 21°C (70°F), averaging just 7°C (46°F). Rainfall is also less prevalent, with only 67 mm over 8 days and lower humidity at 75%. For more detailed information about weather conditions during this month, you can check Yamaguchi weather in December.
As spring unfolds, May in Yamaguchi showcases a delightful transition from the cooler temperatures of earlier months, presenting a warm, inviting climate that encourages outdoor activities. With an average temperature settling comfortably at 19°C, residents and visitors alike can enjoy blossoming landscapes under a mix of sunshine and occasional rainfall. The humidity, higher than many other months, adds a lushness to the atmosphere, while the 136 mm of precipitation over 11 days ensures the region remains vibrant and green. This combination makes May a unique time to experience Yamaguchi's natural beauty, setting it apart from both the chilly beginnings of spring and the hotter, more humid conditions of summer. For a detailed look at the overall patterns and nuances, check out Yamaguchi Climate.