Last updated: August 21, 2025
Experience the charming weather of Kusatsu, Japan, in May, where temperatures fluctuate from a refreshing minimum of 6°C (43°F) to a comfortable maximum of 32°C (89°F), averaging around 19°C (66°F). This month is characterized by an average humidity of 83%, creating a lush and vibrant atmosphere. However, be prepared for the frequent rain, with 11 days of precipitation totaling 144 mm (5.7 in). Whether you’re exploring the town’s enchanting landscapes or soaking in its famous hot springs, May’s weather adds a unique touch to your Kusatsu experience!
In Kusatsu, Japan, May marks a vibrant transition into warmer weather, with temperatures experiencing a notable upswing. The month kicks off with a minimum temperature of 6°C (43°F) and an average of 19°C (66°F), perfectly setting the stage for springtime activities. As the days progress, peak temperatures can soar to a pleasant 32°C (89°F), reflecting the region's growing warmth after the chilly winter months. This increase in temperature not only signifies the end of frosty nights but also encourages a lively outdoor atmosphere, making May an ideal time to explore the stunning landscapes and rich culture of Kusatsu. Overall, the temperature trend emphasizes a shift from the colder months, allowing residents and visitors alike to bask in the invigorating embrace of spring.
In May, Kusatsu, Japan, experiences a noticeable uptick in precipitation, with 144 mm (5.7 in) of rain recorded over 11 days. This marks a continuation of the wetter pattern established in the preceding months, where April also saw significant rainfall at 138 mm (5.4 in). As spring transitions into summer, the increased frequency of rainy days leads to lush landscapes, enhancing the region's natural beauty. Interestingly, this trend continues into June, highlighting the onset of the rainy season, which peaks dramatically in July with 253 mm (10.0 in). The steady growth in precipitation from April to May shows how the climate in Kusatsu supports both vibrant flora and the local atmosphere, making it a fascinating time to experience this mountainous area’s rich ecology.
In Kusatsu, Japan, May marks a notable shift in humidity as it rises to 83%, suggesting the onset of a more humid season. This increase follows a gradual decline from 82% in January to 74% in March, before slightly bouncing back to 76% in April. The transition into May aligns with a steady upward trend, as humidity levels continue to soar through the summer months, peaking at 93% in July. This pattern illustrates a typical alpine climate where cool, dry winters give way to warmer, more humid summers, creating a refreshing yet sometimes clammy experience for residents and visitors alike. As the year progresses, those in Kusatsu can expect the air to feel increasingly moist, a reminder of the lush greenery and vibrant landscapes that thrive in such conditions.
As spring reaches its peak in Kusatsu, Japan, the May UV Index spikes to an extreme level of 11, indicating a significant shift from the previous months' readings. This pattern marks the start of a summer trend where the UV Index remains consistently high, with burn times decreasing to a rapid 10 minutes. Following January's moderate levels and the high index in February, March and April introduce increasingly dangerous UV exposure. In May, outdoor enthusiasts should be particularly cautious, as the risk of skin damage escalates sharply. Those planning activities in the sun should arm themselves with effective sun protection strategies. Embrace the warmth, but remember to stay safe; for more details, check the Kusatsu UV Index.
UV Risk Categories
As May unfolds in Kusatsu, Japan, the days grow significantly brighter, with 282 hours of glorious sunshine filling the month. This marks a delightful increase from April's already generous 270 hours and continues the upward trend seen since January's modest beginnings at 177 hours. Each passing month reveals a rising enthusiasm for sunshine, peaking dramatically in August with 292 hours, before gradually retreating as autumn approaches. The gradual progression from spring into summer highlights not only the warmth of the season but also the vibrant energy that envelops this picturesque locale. With each sun-soaked day, Kusatsu invites residents and visitors alike to embrace the outdoors, relish in nature's beauty, and savor the fleeting joy of warm weather before the cooler months arrive.
In Kusatsu, Japan, the likelihood of sunny weather takes a noticeable dip in May, with only a 24% chance of sunshine, the second lowest of the year. This decline follows the slightly brighter April, which offers a 43% chance, yet precedes the rainy months of June and July when sunny days drop even further to 20% and 29% respectively. As spring transitions into summer, it seems that May's unreliable sunshine might make you long for the more consistent sunny spells found earlier in the year, particularly in October and November, where the likelihood shoots back up to 48% and 52%. Keep this in mind when planning your activities in May, as the weather may not be as sunny as you hope!
As spring unfolds into early summer, Kusatsu, Japan experiences a gradual increase in daylight duration, reflecting the transition of the seasons. Starting in January and February with a consistent 10 hours of daylight, there’s a notable boost in March to 11 hours as spring approaches. By April and May, the days stretch out to 13 hours, offering ample sunlight that enhances outdoor activities and the blossoming landscape. This trend continues into June and July, where daylight peaks at 14 hours, providing long, vibrant days perfect for enjoying Kusatsu's renowned hot springs and natural beauty. As summer wanes into August, the daylight begins to recede slightly, yet it still basks in 13 hours, before tapering back to 12 hours in September. The gradual decline continues into the final months of the year, with daylight decreasing to 10 hours by November and diminishing further to 9 hours in December, leading to a seasonal rhythm that beautifully showcases the changing landscape and cultural practices of this picturesque region.
In Kusatsu, Japan, the wind in May showcases a gentle shift as winter gives way to spring. With an average wind speed of 2.7 m/s (6 mph), May marks a slight decrease from the slightly brisker conditions of earlier months like January through April. This trend hints at a transition towards the calmer summer months, as seen in June and July, where speeds dip to 2.1 m/s (5 mph). The gradual reduction in wind speed not only contributes to the region's serene atmosphere but also enhances the beauty of Kusatsu's lush landscapes, making it an inviting time for outdoor activities. As the year progresses, the winds become milder, reflecting a peaceful shift that characterizes the enchanting allure of this Japanese gem in mid-spring.
Weather in Kusatsu varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Kusatsu, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present stark contrasts in weather conditions. In May, temperatures range from a minimum of 6°C (43°F) to a comfortable average of 19°C (66°F), peaking at a maximum of 32°C (89°F). This month experiences considerable rainfall, with total precipitation reaching 144 mm (5.7 in) over 11 days, resulting in a high humidity of 83%. In contrast, January brings much colder temperatures, with a minimum of -7°C (20°F) and an average of just 4°C (39°F), while the maximum reaches only 15°C (60°F). Additionally, January is drier, with only 52 mm (2.0 in) of precipitation over 8 days, accompanied by a similar humidity level of 82%. For a more detailed look at January weather, you can check Kusatsu weather in January.
May and February exhibit distinct differences in weather patterns. In May, temperatures can range from a cool 6°C (43°F) at night to a warm 32°C (89°F) during the day, with an average temperature of 19°C (66°F). This month also sees a substantial amount of rainfall, with 144 mm (5.7 in) of precipitation spread over 11 days, resulting in relatively high humidity at 83%. In contrast, February experiences much cooler temperatures, with lows plummeting to -6°C (21°F) and highs reaching up to 19°C (67°F), resulting in a much lower average of 5°C (41°F). February also has less rainfall, totaling 59 mm (2.3 in) over 8 days, accompanied by a humidity level of 79%. For a detailed look at February weather in Kusatsu, visit Kusatsu weather in February.
In comparing the weather of May and March, it's clear that May enjoys significantly warmer temperatures, with averages reaching up to 19°C (66°F) and maximums soaring to 32°C (89°F), while March cools down to an average of 9°C (49°F) and peaks at only 23°C (73°F). Additionally, May experiences higher humidity at 83%, compared to March's 74%, making it feel more sultry. Despite both months having a similar number of rainy days (11), May sees more precipitation overall, totaling 144 mm (5.7 in) versus March's 116 mm (4.6 in). For more specific details on March conditions, you can check Kusatsu weather in March.
In April, temperatures in Kusatsu range from a chilly minimum of -1°C (31°F) to a comfortable average of 14°C (57°F) and a maximum of 27°C (80°F). The month sees about 138 mm (5.4 in) of precipitation, occurring over 10 days, with humidity sitting at 76%. In contrast, May experiences much warmer conditions, with temperatures ranging from a low of 6°C (43°F) to an average of 19°C (66°F) and peaking at a high of 32°C (89°F). Notably, May brings slightly more precipitation at 144 mm (5.7 in) over 11 days, along with increased humidity at 83%. For more detailed information on April's weather, check out Kusatsu weather in April.
May and June present a notable transition in weather patterns. In May, temperatures range from a minimum of 6°C (43°F) to a maximum of 32°C (89°F), with an average of 19°C (66°F). This month experiences 144 mm (5.7 in) of precipitation over 11 days, coupled with relatively high humidity at 83%. In contrast, June sees a rise in the minimum temperature to 11°C (52°F) and an average of 22°C (72°F), while the maximum remains similar at 32°C (90°F). Precipitation levels slightly decrease to 141 mm (5.6 in) over 12 days, and humidity increases to 87%. Overall, June is warmer and more humid than May, marking the onset of the summer season. For more details, check out the Kusatsu weather in June.
May and July display notable differences in weather patterns. In May, temperatures range from a cool 6°C (43°F) at night to a warm 32°C (89°F) during the day, with an average temperature of 19°C (66°F). The month sees considerable precipitation, totaling 144 mm (5.7 in) over 11 days, accompanied by relatively high humidity at 83%. In contrast, July warms up significantly, with nighttime lows of 19°C (66°F) and daytime highs reaching up to 37°C (98°F), averaging 26°C (80°F). This month is also wetter, receiving 253 mm (10.0 in) of rain across 19 days, coupled with increased humidity at 93%. For a detailed view of July weather, check Kusatsu weather in July.
May and August present quite contrasting weather conditions. In May, temperatures range from a cool 6°C (43°F) at night to a warm 32°C (89°F) during the day, with an average of 19°C (66°F). This month experiences significant precipitation, with about 144 mm (5.7 in) falling over approximately 11 days, and humidity levels are around 83%. In contrast, August is considerably warmer, with minimum temperatures of 18°C (65°F) and highs reaching up to 38°C (101°F), averaging 28°C (83°F). The month sees even higher precipitation at 168 mm (6.6 in) over 12 days, along with increased humidity at 91%. For a detailed look at the weather patterns in August, you can check Kusatsu weather in August.
May and September present notable differences in weather patterns. May features a broader temperature range, with minimums dipping to 6°C (43°F) and maximums peaking at 32°C (89°F), while September enjoys milder lows of 14°C (57°F) and warmer highs reaching 35°C (96°F). Both months experience significant precipitation, with May receiving 144 mm (5.7 in) across 11 days and September slightly less at 136 mm (5.4 in) over 13 days. Humidity levels are also somewhat higher in September at 87%, compared to May’s 83%. For a detailed look at September weather, you can check Kusatsu weather in September.
In May, the weather features a comfortable average temperature of 19°C (66°F), with maximum highs reaching up to 32°C (89°F) and minimum lows around 6°C (43°F). However, this month also experiences significant precipitation, with 144 mm (5.7 in) falling over 11 days and high humidity levels at 83%. In comparison, October sees a slightly warmer average of 18°C (65°F) with maximum temperatures peaking at 33°C (92°F) and minimums around 7°C (45°F). Rainfall increases to 227 mm (8.9 in) over 13 days, along with a marginally higher humidity at 85%. For a detailed overview of October weather specifics, you can visit Kusatsu weather in October.
May and November exhibit distinct weather patterns, with May showcasing a much warmer climate. In May, temperatures range from a minimum of 6°C (43°F) to a maximum of 32°C (89°F), highlighting the arrival of spring and its warmth. This month also experiences higher precipitation levels, with 144 mm (5.7 in) falling over 11 days, contributing to a high humidity of 83%. In contrast, November's temperatures range from a chilly -1°C (31°F) to a milder 25°C (77°F), with an average temperature of 12°C (54°F). The month is much drier, with only 41 mm (1.6 in) of precipitation over just 5 days, yet it also maintains the same humidity level of 83%. For those interested in more details, you can check out Kusatsu weather in November.
May and December present stark contrasts in weather patterns. In May, temperatures range from a cool 6°C (43°F) at night to a warm 32°C (89°F) during the day, with an average of 19°C (66°F). This month also experiences higher precipitation, with 144 mm (5.7 in) falling over 11 days, maintaining a humid atmosphere at 83%. In comparison, December boasts much cooler temperatures, with a minimum of -7°C (19°F) and a maximum of 22°C (72°F), averaging around 6°C (44°F). Precipitation is lower in December, totaling 63 mm (2.5 in) over 8 days, yet humidity remains at 83%. For more details on December weather in this region, check out Kusatsu weather in December.
As spring unfolds in May, Kusatsu experiences a delightful transition to warmer temperatures, making it stand out from the cooler months preceding it. With an average temperature climbing to a pleasant 19°C, the warmer days invite outdoor activities amidst the lush environment. However, this month also brings an increase in humidity and precipitation, resulting in about 11 days of rain that nourish the vibrant landscapes. The contrast between sunny afternoons and the occasional shower underscores Kusatsu's charm, making May an ideal time to embrace the area's natural beauty. For a deeper dive into what this month offers, explore more at Kusatsu Climate.