Last updated: August 21, 2025
May in Hamamatsu, Japan presents a vibrant transition into warmer weather, characterized by a maximum temperature of 32°C (90°F) and a pleasant average of 20°C (68°F). As spring unfolds, the minimum temperature dips to 9°C (49°F), providing a refreshing chill during cooler nights. However, residents and visitors should prepare for ample precipitation, with 198 mm (7.8 in) of rain spread over 12 days, contributing to the lush, green landscape. With humidity levels at 81%, this month embodies the essence of Japanese spring, blending warmth and moisture in a delightful atmosphere.
In May, Hamamatsu, Japan welcomes a delightful transition into warmer weather, with temperatures rising significantly from the chill of earlier months. The minimum temperature settles at a comfortable 9°C (49°F), while the average climbs to a pleasant 20°C (68°F), making outdoor activities increasingly appealing. This month also witnesses the peak of warmth as the maximum temperature reaches an inviting 32°C (90°F), marking a notable leap from the cooler temperatures of April. With such a luxurious range of temperatures, May is a perfect time to enjoy the blossoming beauty of the region, as it balances the lingering freshness of spring with the nascent warmth of summer.
May in Hamamatsu marks a transition into a wetter season, as reflected by the 198 mm (7.8 in) of precipitation—making it one of the rainiest months of the year. This uptick accompanies an increase in rainy days, with 12 days of precipitation, setting the stage for the heavy rains of June and July. The growing trend from January's 51 mm to May's significant total underscores not just the arrival of spring showers, but also the anticipation of the summer monsoon. As the lush greenery begins to flourish, May stands out as a pivotal month that bridges the lighter, drier conditions of early spring with the intense moisture of the upcoming summer months.
In May, Hamamatsu, Japan, experiences a significant uptick in humidity, reaching 81%. This rise marks a transition toward the wet and humid summer months, with June seeing humidity soar to 88% and July peaking at a staggering 93%. Observing the trends, we notice that May's humidity is not only higher than the previous months—January through April—ranging from 70% to 76%—but also foreshadows the steamy conditions that characterize the upcoming summer. As the seasons shift, residents and visitors alike prepare for the lush, vibrant atmosphere that high humidity brings, setting the stage for Hamamatsu's warm, lively days ahead.
As May arrives in Hamamatsu, Japan, residents and visitors alike should be prepared for a significant rise in UV exposure. This month boasts an extreme UV Index of 11, requiring just 10 minutes of unprotected sun exposure before the risk of skin damage escalates. This sharp increase follows a month of already high UV levels, with April peaking at an index of 10. The trend shows a noteworthy escalation from the moderate conditions earlier in the year, particularly in January and February, where the UV Index was only 4 and 5 respectively. As we head into the peak summer months, the UV Index will maintain its extreme classification, emphasizing the importance of sun protection. For more detailed information, check out the Hamamatsu UV Index.
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May brings a vibrant burst of sunshine to Hamamatsu, Japan, with an impressive 299 hours of sunlight, marking it as one of the sunniest months of the year. This increase in daylight follows a steady upward trend from January's modest 189 hours through to April's 281 hours, highlighting the region's transition into a warmer, brighter season. As summer approaches, June sees a slight dip to 275 hours, but the golden rays of August steal the show, boasting an astonishing 317 hours. The overall sunny trend from spring to summer not only enhances the beauty of this coastal city but also invites both locals and tourists to bask in the blissful warmth of the Japanese sun.
In Hamamatsu, Japan, the likelihood of sunny weather takes a notable dip in May with only a 28% chance of sunshine, marking it as one of the cloudier months of the year. This decline follows a slight increase in April and starkly contrasts with the brighter months at the start of the year, such as January and February, where sunny chances hover around 58% and 60%, respectively. Interestingly, while the sunny disposition begins to fade in the late spring, it starts reclaiming ground by October, with a more favorable 53% chance of sunshine. Overall, May presents a transitional phase, reminding residents and visitors alike to prepare for the chance of overcast skies as they enjoy the blooming beauty of spring.
In Hamamatsu, Japan, the daylight duration experiences a gradual evolution throughout the year, showcasing a distinct seasonal pattern. Beginning in January and February, the city enjoys a steady 10 hours of daylight, which blooms into longer days as spring approaches. By March, daylight extends to 11 hours, and by April, it reaches a refreshing 13 hours, signaling the full arrival of spring's vibrancy. This trend continues into May, where daylight remains at 13 hours, providing ample time for outdoor exploration. As summer unfolds in June and July, Hamamatsu basks in the remarkable brightness of 14 hours each day, the longest daylight period of the year. As autumn sets in, the days gradually shorten, dropping to 12 hours in September before easing down to 10 hours in November and culminating in 9 hours by December. This rhythmic cycle of daylight not only enhances the region's natural beauty but also shapes the lifestyle of its residents throughout the seasons.
In May, Hamamatsu experiences a mild breeze with an average wind speed of 3.9 m/s (9 mph), marking a slight increase from the previous months of April (3.7 m/s) and March (3.9 m/s). This gentle wind contributes to the pleasant spring atmosphere, as temperatures begin to rise and nature blossoms. As the month transitions into summer, it’s interesting to note that wind speeds generally decline during the warmer months of June and July, dropping to 2.7 m/s and 2.6 m/s respectively. This trend of decreasing wind speeds highlights the calmer and more stable weather patterns of late spring and early summer, creating a serene backdrop for outdoor activities in this vibrant coastal city.
Weather in Hamamatsu varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Hamamatsu, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present stark contrasts in weather. During May, temperatures typically range from a minimum of 9°C (49°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F). The month is characterized by high humidity levels (81%) and considerable rainfall, with a total precipitation of 198 mm (7.8 in) over roughly 12 days. In contrast, January experiences much cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 18°C (64°F), averaging around 7°C (44°F). It also has significantly less precipitation, totaling 51 mm (2.0 in) over just 4 days, and slightly lower humidity at 76%. For more details on January weather, you can visit Hamamatsu weather in January.
May and February present a striking contrast in weather. In May, temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F), making it a much warmer month. In contrast, February experiences much cooler temperatures, with a minimum of -2°C (29°F) and a maximum reaching only 21°C (71°F), and an average of 7°C (46°F). May also tends to be more humid, boasting an average humidity of 81% compared to February's 74%. Additionally, May sees significantly more precipitation, with 198 mm (7.8 in) over 12 days, whereas February has 76 mm (3.0 in) over just 6 days. For a detailed look at February's weather, you can check out Hamamatsu weather in February.
In comparing the weather between March and May, significant differences are evident. May experiences a warmer range of temperatures, with averages around 20°C (68°F) and maximums soaring to 32°C (90°F), while March tends to be cooler, averaging 12°C (53°F) with a maximum of 25°C (77°F). Additionally, May tends to be wetter, receiving 198 mm (7.8 in) of precipitation over approximately 12 days, compared to March's total of 166 mm (6.5 in) across 10 days. Humidity levels also rise in May to 81%, compared to March's 70%. For a detailed look at March weather, visit Hamamatsu weather in March.
In comparing the weather between April and May, we see a notable shift in temperatures and humidity levels. May experiences a broader temperature range, with minimums around 9°C (49°F), an average of 20°C (68°F), and maximums reaching as high as 32°C (90°F). In contrast, April is cooler, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 28°C (83°F) and an average of 15°C (60°F). Additionally, May sees increased precipitation, accumulating to 198 mm (7.8 in) over 12 days, compared to April’s 172 mm (6.8 in) over 11 days, alongside higher humidity levels at 81% in May versus 74% in April. For those interested in more details about April weather specifically, check out Hamamatsu weather in April.
May and June weather in Hamamatsu presents a notable shift in temperature and precipitation patterns. In May, temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F). The month experiences 198 mm (7.8 in) of precipitation over 12 days and has a humidity level of 81%. In contrast, June sees warmer temperatures, with a minimum of 15°C (59°F) and an average of 23°C (74°F), maintaining a similar maximum of 32°C (90°F). However, June experiences increased precipitation, totaling 261 mm (10.3 in) over 16 days, accompanied by higher humidity at 88%. For more details about June weather in Hamamatsu, check out Hamamatsu weather in June.
In comparison to May, July experiences significantly warmer temperatures, with minimums starting at 19°C (67°F) and maximums reaching up to 40°C (105°F), while May's range spans from 9°C (49°F) to 32°C (90°F). The average temperature in July is considerably higher at 27°C (81°F), compared to May's average of 20°C (68°F). However, July also sees a notable increase in precipitation, receiving 408 mm (16.1 in) over 21 rainy days, compared to May's 198 mm (7.8 in) over 12 days. Additionally, July's humidity rises to 93%, making it feel more oppressive than the already humid May, which stands at 81%. For more detailed information, visit Hamamatsu weather in July.
May and August present distinct weather patterns, with May offering a cooler range of temperatures from a minimum of 9°C (49°F) to a maximum of 32°C (90°F), averaging around 20°C (68°F). In contrast, August is significantly warmer, featuring a minimum temperature of 20°C (68°F) and peaking at 42°C (107°F), with an average of 29°C (84°F). Both months experience similar levels of precipitation—198 mm (7.8 in) in May and 197 mm (7.8 in) in August—although August has more rainy days at 15 compared to May's 12. Additionally, humidity is notably higher in August at 90%, compared to May's 81%, making the later month feel more oppressive. For a closer look at August weather patterns, check out Hamamatsu weather in August.
In May, temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (90°F), with an average around 20°C (68°F). The month sees a significant amount of precipitation, totaling 198 mm (7.8 in) over about 12 days, coupled with relatively high humidity at 81%.
In contrast, September is generally warmer, with minimum temperatures of 15°C (60°F) and maximums reaching up to 36°C (96°F), averaging 25°C (77°F). While it experiences slightly more rainfall at 222 mm (8.7 in), this occurs over a longer duration of 20 days, leading to a marginally higher humidity of 86%. For a more detailed understanding of September's climate specifics, you can visit Hamamatsu weather in September.
In May, temperatures typically range from a minimum of 9°C (49°F) to a maximum of 32°C (90°F), with an average of about 20°C (68°F). The month sees around 198 mm (7.8 in) of rainfall over approximately 12 days, accompanied by a humidity level of 81%. In contrast, October features slightly higher minimum temperatures at 10°C (50°F) while maintaining the same average and maximum temperatures as May. However, it tends to be wetter, with about 293 mm (11.5 in) of precipitation over 15 days and slightly higher humidity at 83%. For a more detailed look at October conditions, you can check Hamamatsu weather in October.
May and November present contrasting weather patterns, reflecting the transition from spring to late autumn. In May, temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F). The month sees a significant amount of precipitation at 198 mm (7.8 in) over approximately 12 days, contributing to a humidity level of 81%. In contrast, November offers cooler temperatures, ranging from a minimum of 3°C (38°F) to a maximum of 24°C (75°F), with an average temperature of 15°C (58°F). Precipitation in November is considerably lower at 83 mm (3.3 in) across 8 days, and humidity hovers around 80%. For more detailed information about November weather, you can check Hamamatsu weather in November.
May and December present a stark contrast in weather patterns. In May, temperatures range from a minimum of 9°C (49°F) to a sizzling maximum of 32°C (90°F), accompanied by an average temperature of 20°C (68°F). The month sees significant rainfall, with 198 mm (7.8 in) of precipitation over approximately 12 days, contributing to a high humidity level of 81%. In contrast, December experiences much cooler weather, with temperatures ranging from a chilly 0°C (32°F) to a maximum of 23°C (74°F) and an average of just 9°C (49°F). Precipitation is notably lower, at 67 mm (2.6 in) spread across about 6 days, resulting in a slightly lower humidity of 78%. For more details, check out Hamamatsu weather in December.
As May unfolds in Hamamatsu, the weather becomes a delightful transition into warmer days, boasting an average temperature that invites outdoor adventures. While the month can see a maximum of 32°C, it also comforts with cooler evenings, creating a pleasant range that differs significantly from the chillier winter months. Despite the average humidity of 81% and precipitation spread across 12 days, May's vibrant atmosphere signals the blossoming of spring and the approach of summer. For a deeper dive into how May's conditions compare with the rest of the year, explore the insights on Hamamatsu Climate.