May Weather in Hachimantai, Japan

Last updated: August 21, 2025

In Hachimantai, Japan, the weather in May brings a delightful mix of warmth and moisture, marking the transition into summer. The maximum temperature can soar to a balmy 29°C (85°F), while the average dip sits at a cool 13°C (56°F), and the thermometer can drop to a brisk minimum of 2°C (35°F). This month witnesses a total precipitation of 100 mm (3.9 in), spread across approximately 13 days, contributing to an overall humidity level of around 80%. Visitors can expect vibrant, lush landscapes, though packing an umbrella is wise for those wandering through this stunning region!

May Temperature in Hachimantai

In May, Hachimantai begins to shake off the chill of winter, with temperatures rising significantly compared to the earlier months. The minimum temperature settles comfortably at 2°C (35°F), while the average climbs to a pleasant 13°C (56°F), peaking at a balmy 29°C (85°F). This surge marks a stark contrast to the frigid depths of January, where the temperatures hovered well below zero. As spring unfolds, Hachimantai experiences a transition not only in temperature but also in the vibrant scenery, as the region bursts with blooming flora under the warming sun. The delightful weather makes May an ideal time for outdoor adventures, inviting visitors to explore the stunning landscapes that come alive with the season's change.

May Weather in Hachimantai: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Hachimantai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hachimantai, May typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec242535445662707264534129
Data source: Temperature data for Hachimantai generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Hachimantai

In Hachimantai, May marks a transitional period in terms of precipitation, with an average rainfall of 100 mm (3.9 in) falling over approximately 13 days. This represents a slight decrease from the wetter month of April, which recorded 119 mm (4.7 in) over 17 days. Interestingly, May's precipitation combines the high levels of springtime moisture with the onset of the summer season, setting the stage for the upcoming rainy months. As we move into June, rainfall increases to 113 mm (4.4 in), hinting at a pattern of growing intensity that persists through the summer. Overall, May showcases Hachimantai's characteristic variability, bridging the gap between spring showers and the summer deluge, making it a vital month for the region's rich vegetation.

May Precipitation Trends in Hachimantai

The chart displays monthly precipitation patterns in Hachimantai, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Hachimantai, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec6284981191001131551451141526688
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Hachimantai

In Hachimantai, Japan, May marks a transitional point in humidity levels, rising to 80%, which mirrors the moisture levels found in January and December. This month's humidity signals the approach of summer, gradually paving the way for even more humid conditions in the ensuing months. As spring gives way to summer, it's noteworthy that the humidity steadily climbs, reaching its peak in July and August at a sweltering 92%. Observing these trends, one can appreciate how the year's rhythm unfolds, with May acting as a bridge between the crisp, dry air of earlier months and the muggy warmth of summer.

May Average Humidity in Hachimantai

This chart illustrates the average monthly humidity levels in Hachimantai, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Hachimantai is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%77%75%80%87%92%92%86%82%79%80%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Hachimantai

As spring transitions to summer in Hachimantai, Japan, the UV Index in May reaches a notable 9, marking it as a very high exposure category. This is a significant increase from April's already high reading of 8, indicating that sun protection becomes increasingly essential during this period. With a burn time of just 15 minutes, outdoor enthusiasts and sunbathers should take care to shield their skin from harmful rays. This trend of intensifying UV levels continues into June, where the Index escalates to 11, categorized as extreme. Thus, as days grow longer and sunnier, residents and visitors alike should remain vigilant against UV radiation to enjoy the beautiful landscapes of Hachimantai safely. For more detailed information, check the full Hachimantai UV Index.

Maximum UV Index Levels in Hachimantai for May

The chart shows the monthly maximum UV Index (UVI) for Hachimantai in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Hachimantai typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891110119643
Data source: Hachimantai May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Hachimantai

May brings a delightful peak of sunshine to Hachimantai, Japan, with an impressive 288 hours of bright, golden rays gracing the region. This surge in daylight marks a significant increase from the previous months, showcasing the transition from spring to early summer. In comparison, January starts with a mere 152 hours, illustrating how the days gradually lengthen as the year unfolds. April already hints at the vibrant warmth ahead, providing 258 hours of sunlight, but May truly shines, setting the stage for the warmer months to come. Following this sunny peak, June experiences a slight dip to 272 hours, yet it remains a robust month for sunlight. This trend of increasing daylight continues to captivate residents and visitors alike, making May a particularly joyful time in Hachimantai, where nature blossoms under the generous splay of sunshine.

Monthly Sunshine Duration in Hachimantai: May Highlighted

The May sunshine duration represents the total number of hours Hachimantai experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec152h200h250h258h288h272h269h254h241h211h195h182h
Data source: Hachimantai May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Hachimantai During May

As May rolls around in Hachimantai, Japan, the likelihood of sunny weather dips to 26%, presenting a notable decline compared to the lively 41% recorded in April. This drop mirrors a broader trend of fluctuating sunshine throughout the spring, where the promise of brighter days seems to wane just as summer approaches. Interestingly, while May's percentages appear less favorable, they align with typical patterns seen in the months preceding the peak summer season, suggesting a transitional phase rather than a complete departure from sunnier days. As residents and visitors alike anticipate the warming months, this mild outlook for May reflects the charming unpredictability of Hachimantai's weather.

Percentage of Sunny Days in May in Hachimantai

The chart illustrates the percentage of sunny days in Hachimantai throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Hachimantai experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec31%38%30%41%26%28%26%17%29%34%37%31%
Data source: Hachimantai May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Hachimantai in May

In Hachimantai, Japan, the progression of daylight duration throughout the year reveals a captivating seasonal rhythm. Starting from a modest 9 hours in January, daylight gradually increases, reaching 10 hours in February and 11 hours in March. As spring unfolds, April brings a significant leap to 13 hours, heralding the vibrancy of longer days. By May, daylight peaks at 14 hours, a trend that persists through June and July, capturing the essence of summer's embrace. However, as the seasons transition, the days begin to shorten once more, with August seeing a slight decline to 13 hours, followed by gradual decreases through autumn and into winter, where daylight dwindles back to 9 hours in November and December. This annual cycle not only enhances the beauty of Hachimantai's landscapes but also encapsulates the rhythmic dance of nature's own clock.

Average Daylight Hours in Hachimantai for May

The chart illustrates the variation in daylight duration in Hachimantai throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 40m10h 40m11h 56m13h 15m14h 22m14h 56m14h 39m13h 40m12h 25m11h 7m9h 58m9h 22m
Data source: Hachimantai daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Hachimantai

In Hachimantai, Japan, the may winds are among the gentler breezes of the year, averaging 2.9 m/s (7 mph). This marks a slight dip from the preceding months, with January through April consistently delivering winds around 3.1 to 3.8 m/s (7-8 mph). As spring transitions into early summer, the calming winds of May begin to set the tone for the warmer months ahead, contrasting with the steadily diminishing speeds of June through August. Here, the wind becomes noticeably lighter, dropping to 2.1 m/s (5 mph) in June and even lower in July at 1.8 m/s (4 mph), signaling a shift towards a more tranquil season. This trend highlights Hachimantai's embrace of mildness as summer approaches, inviting visitors to enjoy the stunning landscape without the disruptive rush of strong winds.

Average May Wind Speed in Hachimantai

The chart displays monthly wind speed patterns in Hachimantai, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.13.83.23.12.9 m/s2.11.82.22.32.32.73.2
Data source: Hachimantai May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Hachimantai Compares to Other Months

Weather in Hachimantai varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Hachimantai, focusing on differences in temperature, rainfall, humidity, and UV levels.

May and January present striking contrasts in weather dynamics. In May, temperatures range from a minimum of 2°C (35°F) to a pleasant average of 13°C (56°F), peaking at a muggy 29°C (85°F). The month experiences considerable precipitation, totaling 100 mm (3.9 in) over 13 days, with humidity remaining consistently high at 80%. In contrast, January is significantly colder, with temperatures plummeting to a minimum of -18°C (1°F) and an average of -4°C (24°F), reaching a maximum of just 5°C (41°F). This winter month has less precipitation, totaling 62 mm (2.4 in) across 11 days, yet maintains the same humidity level of 80%. For a more detailed look at January weather conditions, visit Hachimantai weather in January.

May and February present strikingly different weather conditions. In May, temperatures range from a chilly 2°C (35°F) at night to a warm 29°C (85°F) during the day, averaging around 13°C (56°F). On the other hand, February experiences much colder temperatures, with a minimum of -20°C (-4°F) and a maximum of 8°C (46°F), averaging about -4°C (26°F). Precipitation in May is slightly higher at 100 mm (3.9 in) over 13 days, compared to February's 84 mm (3.3 in) spread over 15 days. Humidity levels are relatively similar, with May at 80% and February at 79%. For a more detailed look at February weather, you can visit Hachimantai weather in February.

In comparing the weather of May and March, it's evident that May experiences significantly warmer temperatures, with average highs reaching up to 29°C (85°F), while March has a maximum of only 17°C (63°F). The minimum temperatures also reflect this contrast, with March dipping as low as -17°C (1°F), while May's minimum is a much milder 2°C (35°F). Precipitation levels are fairly similar in both months, with May receiving 100 mm (3.9 in) over 13 days and March experiencing 98 mm (3.9 in) across 14 days. Additionally, humidity is slightly higher in May at 80%, compared to March's 77%. For a more detailed look at March conditions, you can check Hachimantai weather in March.

In comparing the weather between April and May, we can see a notable shift in both temperature and precipitation patterns. April brings cooler temperatures, with an average of 7°C (44°F) and a maximum of 23°C (73°F), while May sees a significant rise, boasting an average temperature of 13°C (56°F) and a peak of 29°C (85°F). Despite May's warmer climate, it experiences slightly less precipitation, totaling 100 mm (3.9 in) across 13 days compared to April's 119 mm (4.7 in) over 17 days. Additionally, May has a higher humidity level at 80%, compared to April's 75%. For a more detailed insight into April's weather, you can visit Hachimantai weather in April.

May and June exhibit a gradual warming trend, with June showing a notable increase in average temperature. In May, temperatures range from a chilly 2°C (35°F) to a comfortable max of 29°C (85°F), while June’s temperatures start at a slightly higher minimum of 5°C (42°F) and maintain the same maximum of 29°C (84°F). Both months experience similar levels of precipitation, with May receiving 100 mm (3.9 in) and June slightly wetter at 113 mm (4.4 in), occurring over the same number of days — 13. However, June also sees a slight rise in humidity, reaching 87% compared to May's 80%. For more details, check out Hachimantai weather in June.

May and July exhibit notable differences in weather characteristics. In May, temperatures range from a chilly minimum of 2°C (35°F) to a warm maximum of 29°C (85°F), with an average of 13°C (56°F). This month sees around 100 mm (3.9 in) of precipitation, distributed across 13 rainy days, accompanied by an 80% humidity level. In contrast, July experiences milder nights with a minimum of 12°C (55°F) and significantly warmer days, peaking at 32°C (90°F) and averaging 21°C (71°F). The month is wetter, too, with approximately 155 mm (6.1 in) of rainfall over 18 days and a slightly higher humidity of 92%. For more details, you can check Hachimantai weather in July.

May and August present distinct weather patterns, with May characterized by cooler temperatures and a more variable climate. In May, temperatures range from a chilly 2°C (35°F) at night to a pleasant 29°C (85°F) during the day, with an average of 13°C (56°F). The month sees around 100 mm (3.9 in) of rainfall over 13 days and a humidity level of 80%. Conversely, August brings warmer temperatures, with a minimum of 10°C (50°F) and a maximum of 33°C (92°F), averaging at 22°C (72°F). While it is the warmest month of the year, August also experiences higher precipitation, totaling 145 mm (5.7 in) over 16 days, along with increased humidity at 92%. This stark contrast highlights the transition from spring to summer weather. For more detailed insights, you can check Hachimantai weather in August.

May and September exhibit notable differences in weather patterns. In May, temperatures range from a chilly minimum of 2°C (35°F) to a comfortable maximum of 29°C (85°F), with an average of 13°C (56°F). The month sees approximately 100 mm (3.9 in) of precipitation over 13 days and an average humidity of 80%. In contrast, September offers a warmer experience, with temperatures spanning from a minimum of 3°C (38°F) to a maximum of 31°C (88°F), averaging 18°C (64°F). It has slightly higher precipitation at 114 mm (4.5 in), also spread across 13 days, and a humidity level of 86%. For more specific details about September weather, you can check Hachimantai weather in September.

May and October present distinct weather patterns characterized by varying temperatures and precipitation levels. In May, temperatures range from a minimum of 2°C (35°F) to a maximum of 29°C (85°F), with an average of 13°C (56°F). This month experiences about 100 mm (3.9 in) of precipitation over 13 days and has a humidity level of 80%, creating a generally mild and somewhat wet environment.

In contrast, October sees temperatures dropping slightly, with a minimum of 0°C (33°F) and a maximum of 26°C (78°F), averaging at 11°C (53°F). It is somewhat wetter than May, receiving 152 mm (6.0 in) of rainfall across 11 days, with humidity remaining slightly higher at 82%. For more detailed insights into October weather, you can check Hachimantai weather in October.

May and November present contrasting weather conditions, marking a transition from spring to late autumn. In May, temperatures range from a mild 2°C (35°F) at night to a warm 29°C (85°F) during the day, with an average of 13°C (56°F). The month experiences about 100 mm (3.9 in) of precipitation across 13 days, accompanied by relatively high humidity at 80%. In contrast, November brings colder temperatures, with nighttime lows plummeting to -12°C (11°F) and daytime highs reaching only 18°C (65°F), averaging around 5°C (41°F). Precipitation decreases to 66 mm (2.6 in) over 11 days, with humidity remaining similar at 79%. For more detailed information, you can check Hachimantai weather in November.

May and December present stark contrasts in weather conditions. In May, temperatures range from a chilly 2°C (35°F) at night to a comfortable high of 29°C (85°F) during the day, making it a transition from spring to early summer. This month also sees around 100 mm (3.9 in) of precipitation over approximately 13 days, paired with high humidity levels of 80%, which can create a muggy atmosphere.

Conversely, December plunges into winter, with temperatures dipping significantly to a minimum of -12°C (10°F) and a maximum of 12°C (55°F), resulting in an average of -1°C (30°F). The month experiences slightly lower precipitation at 87 mm (3.4 in), but it occurs over 15 days, maintaining the same humidity level of 80%. For more specific details on December weather, you can check out Hachimantai weather in December.

Compare Hachimantai's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Hachimantai

As May unfolds in Hachimantai, it marks a transition from the chill of winter to the warmth of summer, offering a delightful experience with a blend of mild temperatures and increasing humidity. This month typically sees temperatures climb, making it noticeably warmer than the preceding months, while still retaining a refreshing coolness during the nights. However, it also brings a fair amount of precipitation, with frequent rainy days that contribute to the region's lush landscapes. As nature awakens, the 80% humidity adds a touch of moisture to the air, creating a vibrant atmosphere filled with blooming flora. If you're curious about the overall weather patterns throughout the year, don't miss the detailed insights on Hachimantai Climate.