Last updated: August 21, 2025
In January, Hachimantai, Japan experiences a chilly winter climate characterized by a maximum temperature of 5°C (41°F) and an average low of -4°C (24°F), dipping as low as -18°C (1°F) at times. The region sees approximately 62 mm (2.4 in) of precipitation over 11 days, contributing to the snow-covered landscapes that attract winter sports enthusiasts. With humidity levels around 80%, visitors can expect a crisp, cold atmosphere, ideal for enjoying the serene beauty of Hachimantai's winter scenery.
In Hachimantai, Japan, January is characterized by its biting cold, with temperatures ranging from a chilling -18°C (1°F) at night to a mere 5°C (41°F) during the day. With an average temperature of -4°C (24°F), it marks one of the coldest months of the year, setting the stage for the winter landscape that envelops the region. This stark cold transitions into February when temperatures dip even lower, often reaching a minimum of -20°C (-4°F), illustrating a trend of intensifying winter chill. However, as March arrives, a slow warming begins, bringing daily highs that occasionally flirt with 17°C (63°F), signaling the gradual shift toward spring. The data captures not just the severe winter but also hints at the resilience of nature in this beautiful locale, transitioning from icy extremes to a more temperate climate as the year progresses.
January in Hachimantai, Japan, brings an average precipitation of 62 mm (2.4 in), marked by 11 rainy days. As winter gradually transitions into spring, the region experiences a notable increase in rainfall, with February and March witnessing 84 mm (3.3 in) and 98 mm (3.9 in), respectively. This upward trend continues into the warmer months, peaking in July at a substantial 155 mm (6.1 in), making it the wettest month. The consistent pattern of precipitation throughout the year highlights Hachimantai's varied climate, with a tendency for rain to flourish particularly in late spring and summer, providing a rich environment that supports vibrant ecosystems.
In Hachimantai, Japan, January ushers in a notably humid atmosphere, with humidity levels reaching a robust 80%. This characteristic dampness sets the tone for the winter months, as February sees a slight dip to 79%, before gradually decreasing through March and April to 77% and 75%, respectively. However, as spring transitions to summer, humidity creeps back up, peaking at a staggering 92% during the height of July and August, creating a lush, vibrant environment. The humidity begins to recede in the fall, stabilizing around 82% in October and winding down towards 79% in November. By December, levels return to 80%, completing the cycle. Throughout the year, Hachimantai's humidity exhibits a fascinating ebb and flow, highlighting the region's unique climatic patterns.
In January, Hachimantai, Japan experiences a moderate UV Index of 3, allowing for a burn time of up to 30 minutes. As winter progresses into February, the UV Index increases slightly to 4, yet remains in the moderate category, maintaining the same burn time. However, a notable shift occurs in March when the UV Index leaps to 6, marking the start of the high exposure category and reducing the recommended burn time to 25 minutes. This upward trend continues as spring approaches, leading to even higher indices of 8 in April and 9 in May, both classified as very high, with burn times decreasing to just 15 minutes. The summer months see peaks of UV exposure, reaching an extreme 11 in June and August, where protection becomes crucial with burn times dropping to 10 minutes. As the year winds down, the UV Index tapers back to moderate levels in November and December, mirroring January's values of 3, making those months safer for prolonged outdoor activities. For a detailed overview of UV exposure throughout the year, check Hachimantai UV Index.
UV Risk Categories
In Hachimantai, Japan, the sunshine reveals a fascinating trend as the year unfolds. January starts off with a modest 152 hours of bright daylight, gradually blooming into February's more generous 200 hours. As spring approaches, the sun's presence grows increasingly vibrant, peaking at 288 hours in May before settling slightly in the summer months. With June and July basking in 272 and 269 hours respectively, the days remain plentiful. However, as the seasons shift towards autumn, the sunlight gradually recedes, offering 241 hours in September and tapering down to 182 hours by December. This delightful dance of sunshine not only marks the changing seasons but also enriches the beauty and experiences that Hachimantai has to offer throughout the year.
In Hachimantai, Japan, January offers a 31% chance of sunny weather, making it one of the cooler months for sunlight compared to the rest of the year. This early winter month sees fewer sunny days than February, which boasts a 38% chance, but it holds its ground against March's 30%. As the seasons transition towards spring, the likelihood of sunshine begins to rise, peaking in April with 41%. Notably, summer months see a decline in sunny days, with August dropping to just 17%. Overall, January's weather hints at winter's grasp but hints at the dynamic shifts that lie ahead as the year unfolds.
In Hachimantai, Japan, the daylight duration experiences a fascinating shift throughout the year. In January, the days are relatively short, offering only 9 hours of daylight. As winter melts into spring, February brings an increase to 10 hours, followed by 11 hours in March, signaling the gradual approach of longer days. By April, daylight extends to 13 hours, reaching a peak of 14 hours in both May and June, perfect for outdoor activities and exploration. The trend begins to reverse in late summer, as daylight tapers to 13 hours in August and gradually descends to 12 hours in September. This decline continues into fall, with 11 hours in October and returning to 9 hours by November and December. This cycle not only highlights nature’s rhythm but also sets the stage for the beautiful seasonal transformations in Hachimantai.
In Hachimantai, Japan, January greets residents with a gentle breeze, showcasing an average wind speed of 3.1 m/s (7 mph). This tranquil start to the year is slightly outpaced by February, which sees an increase to 3.8 m/s (8 mph), hinting at greater gusts as winter begins to fade. However, March's winds calm down again to 3.2 m/s (7 mph), aligning with the warmer onset of spring. As the months progress into April and May, the wind continues to maintain a consistent speed, hovering around the 3.1 m/s mark before dipping to a softer 2.9 m/s (7 mph) in late spring. The summer months bring a significant drop, with July experiencing the calmest days at just 1.8 m/s (4 mph). This tranquility persists into August and September, where winds pick up slightly but still remain gentle. Interestingly, as autumn sets in, November sees a mild increase to 2.7 m/s (6 mph) before wrapping up the year with December’s winds returning to 3.2 m/s (7 mph), offering a fitting conclusion to the seasonal cycle of Hachimantai’s breezes. Overall, the pattern reveals a clear trend: as winter yields to spring, winds initially strengthen only to mellow in summer, before gradually intensifying again in late fall and winter.
Weather in Hachimantai varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Hachimantai, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February both experience cold temperatures, but February tends to be slightly chillier at night, with minimum temperatures averaging around -20°C (-4°F) compared to January's -18°C (1°F). Daytime highs increase marginally in February to reach about 8°C (46°F), while January's maximum temperature is capped at 5°C (41°F). Additionally, February sees more precipitation, totaling 84 mm (3.3 in) over 15 days, contrasted with January's 62 mm (2.4 in) across 11 days. Humidity levels remain fairly consistent, averaging 80% in January and 79% in February. For more detailed information, you can check out Hachimantai weather in February.
In comparing the weather between January and March, January typically experiences colder temperatures, with a minimum of -18°C (1°F) and an average of -4°C (24°F), while March sees a higher average of 2°C (35°F) and a maximum of 17°C (63°F). Precipitation is more frequent in March, totaling 98 mm (3.9 in) over 14 days, compared to January's 62 mm (2.4 in) across 11 days. Despite the increase in rainfall during March, the humidity remains relatively similar, at 80% in January and slightly lower at 77% in March. For a more detailed look at March weather specifics, you can check Hachimantai weather in March.
January weather in Hachimantai is characterized by frigid temperatures, with an average high of just 5°C (41°F) and lows dipping as low as -18°C (1°F). The month sees significant precipitation, with 62 mm (2.4 inches) spread over 11 days, coupled with high humidity levels at 80%.
In contrast, April brings a dramatic shift as temperatures rise significantly, with average highs reaching 23°C (73°F) and lows around -10°C (15°F). Precipitation increases to 119 mm (4.7 inches) over 17 days, although humidity moderately decreases to 75%. For more details on the weather during this month, you can check Hachimantai weather in April.
In January, the weather can be quite harsh, with temperatures ranging from a frigid -18°C (1°F) to a maximum of only 5°C (41°F). The month sees an average temperature of -4°C (24°F) and experiences significant cold, coupled with 62 mm (2.4 in) of precipitation over 11 days. Conversely, May welcomes warmer conditions, with temperatures ranging from a minimum of 2°C (35°F) to a pleasant maximum of 29°C (85°F). The average temperature in May is a comfortable 13°C (56°F), with slightly higher precipitation at 100 mm (3.9 in) spread over 13 days; however, the humidity remains consistent at 80% for both months. For those interested in exploring weather specifics, details can be found in this link: Hachimantai weather in May.
The weather in January is characterized by frigid temperatures, with lows dipping to -18°C (1°F) and an average temperature around -4°C (24°F). During this month, precipitation is relatively low at 62 mm (2.4 in) over about 11 days, accompanied by high humidity levels of 80%. In contrast, June brings significantly warmer conditions, featuring temperatures that range from a minimum of 5°C (42°F) to a maximum of 29°C (84°F), with an average of 17°C (63°F). The month sees increased rainfall, totaling 113 mm (4.4 in) across 13 days, and even higher humidity at 87%. For more detailed information, check out Hachimantai weather in June.
In January, temperatures in Hachimantai are quite frigid, with lows plunging to -18°C (1°F) and averaging around -4°C (24°F). The max temperature reaches a mere 5°C (41°F), accompanied by 62 mm (2.4 in) of precipitation over 11 days, all while humidity sits at a high 80%. In sharp contrast, July brings a much warmer climate, with temperatures ranging from a minimum of 12°C (55°F) to a comfortable average of 21°C (71°F) and peaks hitting 32°C (90°F). The summer month sees significantly more rainfall, totaling 155 mm (6.1 in) over 18 days, and even higher humidity at 92%. This stark seasonal shift highlights the dramatic differences in weather patterns throughout the year in Hachimantai. For more detailed information, check out Hachimantai weather in July.
January and August weather in Hachimantai offer a stark contrast, showcasing the region's diverse climate. In January, temperatures range from a frigid minimum of -18°C (1°F) to a maximum of just 5°C (41°F), with an average around -4°C (24°F). Precipitation is moderate at 62 mm (2.4 in) over 11 days, accompanied by a high humidity level of 80%. Conversely, August brings a much warmer atmosphere, with temperatures ranging from a minimum of 10°C (50°F) to a sweltering maximum of 33°C (92°F) and an average of 22°C (72°F). Precipitation increases significantly to 145 mm (5.7 in) over 16 days, along with even higher humidity at 92%. For more details on August weather, visit Hachimantai weather in August.
January and September present strikingly different weather patterns. In January, temperatures can plunge to a minimum of -18°C (1°F), with an average of around -4°C (24°F) and a maximum of 5°C (41°F), creating a cold and crisp environment. The month typically sees 62 mm (2.4 in) of precipitation over 11 days, accompanied by a humidity level of 80%. In contrast, September welcomes milder temperatures, ranging from a minimum of 3°C (38°F) to a maximum of 31°C (88°F), with a comfortable average of 18°C (64°F). This month experiences more precipitation, totaling 114 mm (4.5 in) across 13 days, while humidity slightly increases to 86%. For a closer look at September weather, check out Hachimantai weather in September.
January and October present starkly contrasting weather conditions. In January, temperatures plummet to a minimum of -18°C (1°F) and hover around an average of -4°C (24°F), with a maximum of 5°C (41°F). The month experiences around 62 mm (2.4 in) of precipitation over 11 days, accompanied by high humidity at 80%. In comparison, October welcomes milder conditions, with minimum temperatures around 0°C (33°F) and an average of 11°C (53°F), reaching highs of 26°C (78°F). Precipitation in October increases significantly to 152 mm (6.0 in), also spread over 11 days, while humidity remains slightly higher at 82%. This contrast highlights the transition from the frigid chill of winter to the more temperate, albeit wetter, fall months. For more details on the weather in October, you can visit Hachimantai weather in October.
In January, the weather is significantly colder compared to November, with minimum temperatures plummeting to -18°C (1°F) and an average of -4°C (24°F). In contrast, November experiences milder conditions, featuring minimum temperatures of -12°C (11°F) and an average temperature of 5°C (41°F). Additionally, while both months receive similar levels of precipitation, January sees a total of 62 mm (2.4 in), whereas November has slightly more at 66 mm (2.6 in), with precipitation occurring on 11 days in both months. The humidity levels remain quite close as well, with January at 80% and November at 79%. For more details, you can check Hachimantai weather in November.
January's weather is characterized by colder temperatures, with a minimum of -18°C (1°F) and an average of -4°C (24°F), compared to December's milder conditions, where the minimum is -12°C (10°F) and the average is -1°C (30°F). Additionally, January sees a maximum temperature of just 5°C (41°F), while December can reach as high as 12°C (55°F). Precipitation is more frequent in December, with 15 days of rain, resulting in a total of 87 mm (3.4 in), while January experiences slightly less precipitation at 62 mm (2.4 in) over 11 days. Both months share a consistent humidity level of 80%. For more details on December weather, visit Hachimantai weather in December.
As January settles over Hachimantai, the weather transforms into a crisp and chilly experience that starkly contrasts with the warmer months of the year. Temperatures often plunge below freezing, creating a landscape enveloped in snow and ice, drawing winter enthusiasts to its picturesque scenery. This month is also marked by steady precipitation, resulting in a higher humidity level than many other times of the year. With this unique combination of cold temperatures and significant snowfall, January offers a distinct seasonal charm that sets it apart from the milder conditions usually found in spring and summer. To learn more about how January fits into the broader weather patterns, visit Hachimantai Climate.