Last updated: August 21, 2025
May in Kusatsu, Japan is a delightful transition into warmer weather, with maximum temperatures reaching around 30°C (87°F) and an average of 15°C (59°F). The month showcases a diverse climate experience, ranging from chilly nights dipping to a brisk 0°C (32°F). While this vibrant season is marked by lush greenery and picturesque landscapes, it also brings 139 mm (5.5 in) of rainfall over approximately 16 days, contributing to the area's lushness. With an humidity level of 81%, visitors can expect a refreshing, albeit somewhat humid atmosphere, ideal for exploring the natural beauty Kusatsu has to offer.
In May, Kusatsu, Japan, welcomes the warmth of spring with temperatures that reflect a remarkable transition. The month starts with a minimum of 0°C (32°F), gently rising to an inviting average of 15°C (59°F), and peaks at a delightful 30°C (87°F), showcasing a notable increase from the cooler months. This upward trend is a stark contrast to the chilly January lows of -12°C (11°F). As nature awakens, May's pleasant weather invites outdoor activities and exploration, creating a vibrant atmosphere that encourages visitors to experience the beauty of Kusatsu. With each passing day, the feeling of summer approaching becomes palpable, making it one of the most enjoyable months to visit this picturesque destination.
In Kusatsu, Japan, May marks a notable shift in precipitation patterns, with an increase to 139 mm (5.5 in) compared to the previous months. This uptick is accompanied by 16 rainy days, highlighting the transition to the wetter season. As spring unfolds, the rainfall in May serves as a precursor to the even heavier downpours expected in June, which averages 168 mm (6.6 in). This trend reflects a steady rise in precipitation from the earlier spring months, where April recorded 112 mm (4.4 in). The gradual escalation in both the amount of rainfall and the number of rainy days underscores May's significance as a pivotal point in Kusatsu's climate, paving the way for the more intense summer rains ahead.
In May, humidity in Kusatsu, Japan maintains a comfortable 81%, continuing a trend of moderate levels that began in early spring. Compared to the higher humidity of April, which recorded 78%, May experiences a slight uptick, but it is significantly lower than the soaring levels of summer months, where humidity reaches 92% in July and August. This stability in May suggests a pleasant transition from cooler spring weather into the warmer, more humid summer season, making it an ideal time for outdoor activities before the intensity of July and August’s humidity. The gradual increase from late spring to summer illustrates Kusatsu's distinct seasonal climate, where humidity levels rise steadily, yet May remains refreshingly mild.
In May, Kusatsu, Japan, experiences a noticeable shift in its UV Index, which escalates to a striking 11, categorizing it as extreme. This spike signifies a critical need for sun protection, with a burn time reduced to just 10 minutes for unprotected skin. The trend from earlier months is evident; the UV Index sees a steady climb from January's moderate levels to April's very high, culminating in the intense conditions of May. As summer approaches, the UV Index remains at this extreme level into June, highlighting the importance of vigilance against UV exposure. As you plan your outdoor activities, it's essential to stay informed and protected—check out the full UV index details for Kusatsu here.
UV Risk Categories
May shines brightly in Kusatsu, Japan, as the region basks in 287 hours of glorious sunshine, marking it as the sunniest month of the spring season. This delightful increase follows a steady ascent from 183 hours in January to 279 hours in April, illustrating a clear trend toward longer, sunnier days as spring unfolds. Comparatively, June dips slightly to 267 hours, suggesting that while summer approaches, May holds onto its bright allure a little longer. This vibrant display of sunshine invites locals and travelers alike to enjoy the scenic beauty and rejuvenating warmth that Kusatsu has to offer during this delightful month.
As May rolls into Kusatsu, Japan, the likelihood of sunny weather takes a noticeable dip, with a 24% chance of sunshine. This is a stark contrast to the preceding months like February, boasting a 45% chance of clear skies, and April, where sunshine is a bit more frequent at 42%. The trend suggests that as spring transitions into summer, the weather becomes increasingly unpredictable, with June lowering the sun probability even further to 20%. So, if you're planning outdoor activities in May, be prepared for some cloud cover, as the sun might not shine as brightly as you’d hope.
In Kusatsu, Japan, the transition into May heralds a significant increase in daylight, as the hours stretch to an inviting 14 hours. Following a gradual climb from 9 hours in January, the daylight duration steadily blooms through the spring, peaking in the summer months of June and July. This extended daylight contributes to a lively atmosphere, where nature flourishes and outdoor activities thrive. As the year progresses, daylight begins to recede slightly, signaling the gradual approach of autumn. Thus, May stands out as a vibrant month, where the interplay of lengthening days and the beauty of springtime invites residents and visitors alike to savor the invigorating warmth of the sun.
In Kusatsu, Japan, the winds in May tend to be gentle and soothing, with an average speed of 2.0 m/s (4 mph). This slight breeze is a lovely continuation of the mild conditions seen in the earlier spring months, where average winds range from 2.1 to 2.5 m/s. As we move into summer, a noticeable decline in wind speed occurs, dropping to 1.3 m/s (3 mph) by July. This trend suggests that while May offers a refreshing breath of wind, the later months typically bring calmer and warmer conditions, making Kusatsu a perfect destination for those seeking a serene escape in nature's embrace.
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.
In comparing the weather of May and January, distinct differences emerge. May experiences a much warmer temperature range, with averages around 15°C (59°F) and max temperatures reaching 30°C (87°F), while January is notably colder, with average temperatures hovering around -2°C (29°F) and highs of only 9°C (49°F). Additionally, May sees significantly higher precipitation levels at 139 mm (5.5 in) over 16 days, compared to January's 74 mm (2.9 in) across the same number of days. Humidity is also slightly lower in May at 81% compared to January's 88%, contributing to the overall distinct weather profiles of these two months. For a more detailed look at January conditions, you can refer to Kusatsu weather in January.
May and February present contrasting weather patterns. In May, temperatures begin to warm up significantly, with a minimum of 0°C (32°F) and an average of 15°C (59°F), reaching a pleasant maximum of 30°C (87°F). Rainfall is relatively high at 139 mm (5.5 in) over 16 days, accompanied by moderate humidity of 81%. In contrast, February is notably colder, featuring a minimum temperature of -11°C (12°F) and an average of -1°C (31°F), with highs only reaching 17°C (63°F). Precipitation is lower, totaling 74 mm (2.9 in) over 14 days, and the humidity is slightly higher at 86%. For more detailed weather insights, you can refer to Kusatsu weather in February.
May and March display quite distinct weather patterns. In May, temperatures rise significantly, with a minimum of 0°C (32°F) and an average of 15°C (59°F), reaching a peak of 30°C (87°F). In contrast, March experiences much cooler conditions, starting with a minimum of -8°C (19°F) and an average of 4°C (39°F), though it can peak at a milder 21°C (70°F). While both months see a notable amount of precipitation, May receives 139 mm (5.5 in) over 16 days, whereas March totals 111 mm (4.4 in) in 14 days. Interestingly, both months share a relatively similar humidity level of 81%. For further specifics, you can check Kusatsu weather in March.
In comparing the weather of April and May, we see a noticeable warming trend as spring unfolds. May experiences a temperature range from a chilly minimum of 0°C (32°F) to a much warmer maximum of 30°C (87°F), with an average temperature of 15°C (59°F). In contrast, April starts cooler with a minimum of -5°C (24°F) and reaches a maximum of 27°C (81°F), averaging only 9°C (48°F). Precipitation levels are also higher in May, with 139 mm (5.5 in) falling over 16 days, compared to April’s 112 mm (4.4 in) over 15 days. Both months exhibit relatively high humidity, but May slightly edges out with an average of 81% compared to April’s 78%. For more details on April weather, check out Kusatsu weather in April.
In comparing the weather between May and June, we see a notable shift. May experiences a broader temperature range, with minimums at 0°C (32°F) and maximums reaching 30°C (87°F), while June starts warmer with minimums of 6°C (43°F) and an average of 18°C (65°F). Precipitation increases in June to 168 mm (6.6 in) over 18 days, compared to May's 139 mm (5.5 in) over 16 days, indicating that June is not only wetter but also more humid at 88% versus May's 81%. For more detailed insights, you can explore Kusatsu weather in June.
In comparing the weather between May and July, we see a notable shift in temperature and precipitation patterns. May experiences a wider temperature range with minimums dropping to 0°C (32°F) and averages around 15°C (59°F), while July offers much warmer conditions, with minimums starting at 14°C (58°F) and averages reaching 22°C (72°F). The maximum temperatures are also higher in July, peaking at 33°C (91°F) compared to May's 30°C (87°F).
Precipitation is significantly greater in July, with 278 mm (10.9 in) of rainfall over 25 days, compared to May's 139 mm (5.5 in) over 16 days. Additionally, humidity levels rise in July to 92%, making it feel more tropical than the already humid May at 81%. For more detailed weather patterns in July, check out Kusatsu weather in July.
May and August present notable differences in weather. In May, temperatures range from a chilly 0°C (32°F) to a warm 30°C (87°F) with an average of 15°C (59°F), while August sees a comfortable increase with lows of 11°C (52°F) and highs reaching up to 34°C (93°F), averaging 23°C (74°F). Precipitation also varies, with May experiencing 139 mm (5.5 in) over 16 days, compared to August's 177 mm (7.0 in) over 22 days, indicating a wetter month. Additionally, humidity levels are slightly higher in August at 92%, compared to 81% in May, contributing to a more muggy atmosphere. For more details on August weather in Kusatsu, you can check out Kusatsu weather in August.
May and September present contrasting weather patterns, reflecting the transition from spring to autumn. In May, temperatures range from a minimum of 0°C (32°F) to a maximum of 30°C (87°F), averaging around 15°C (59°F). This month experiences significant rainfall, with 139 mm (5.5 in) over 16 days, accompanied by a relatively high humidity level of 81%.
Conversely, September boasts milder temperatures, with a minimum of 7°C (44°F), an average of 19°C (66°F), and a maximum of 29°C (85°F). The month is slightly wetter, receiving 168 mm (6.6 in) of precipitation across 19 days, and humidity increases to 89%. These changes reflect a shift towards cooler, more humid conditions as the year progresses. For more information on September's climate, check out Kusatsu weather in September.
May and October present distinct weather profiles. In May, temperatures range from a minimum of 0°C (32°F) to a maximum of 30°C (87°F), with an average of 15°C (59°F). This month experiences around 139 mm (5.5 in) of precipitation over approximately 16 days, accompanied by a humidity level of 81%. In contrast, October sees slightly cooler temperatures, ranging from a minimum of 1°C (34°F) to a maximum of 26°C (80°F), with an average temperature of 13°C (55°F). Precipitation increases to 217 mm (8.5 in) spread over 17 days, and humidity rises to 87%. These differences highlight how May is generally warmer and less wet compared to the cooler and wetter October. For more detailed information, you can visit Kusatsu weather in October.
May and November present markedly different weather conditions. May enjoys milder temperatures, with averages around 15°C (59°F) and maximums reaching 30°C (87°F), while November sees cooler averages of 7°C (44°F) and maximums of only 20°C (68°F). Precipitation is more abundant in May, with about 139 mm (5.5 in) spread across 16 days, compared to November's relatively light 50 mm (2.0 in) over just 10 days. Humidity levels remain high in both months, though slightly higher in November at 85%, compared to May's 81%. For a closer look at November weather specifics, you can check Kusatsu weather in November.
In comparing the weather between May and December, we see significant differences in temperature and humidity. May boasts a milder average temperature of 15°C (59°F), with highs reaching up to 30°C (87°F) and a relatively low minimum of 0°C (32°F). In contrast, December experiences much chillier conditions, with an average temperature of just 1°C (35°F) and maximums only reaching 18°C (65°F). Additionally, while May has a higher precipitation total of 139 mm (5.5 in) across 16 days, December sees less rainfall at 76 mm (3.0 in) over 15 days, accompanied by slightly higher humidity at 86%. For those interested in the specifics of Kusatsu during this time, additional details can be found here: Kusatsu weather in December.
May in Kusatsu marks the transition into warmer, more humid days, with temperatures reaching their peak of 30°C, setting it apart from the cooler months of spring. The average temperature hovers around a comfortable 15°C, while the minimum dips to a cool 0°C, showcasing a diverse range of weather that can be experienced. With 139 mm of precipitation over approximately 16 days, the month can be quite rainy, adding a lush vibrancy to the scenery. This higher humidity level of 81% distinguishes May from both the drier autumn and winter months, creating an invigorating atmosphere ideal for exploring the natural beauty of the region. For a deeper understanding of how May fits into the broader Kusatsu climate, explore more details at Kusatsu Climate.