Last updated: August 21, 2025
January in Yamagata, Japan presents a captivating winter landscape, with average temperatures hovering around -2°C (29°F). The mercury can dip to a chilling minimum of -16°C (4°F), while daytime highs reach a mild 8°C (46°F). This month is characterized by significant precipitation, totaling approximately 125 mm (4.9 in) over 21 days, contributing to the region's stunning snowy scenery. With an humidity level of about 80%, the air feels crisp and invigorating, making January an ideal time for winter enthusiasts to embrace Yamagata’s enchanting atmosphere.
In January, Yamagata, Japan, experiences a stark winter chill, with temperatures ranging from a frigid -16°C (4°F) at night to a still-cool 8°C (46°F) during the day. The average temperature hovers around -2°C (29°F), clearly reflecting the depth of winter in this region. As the month progresses into February, temperatures gradually rise, with minimums only dipping to -14°C (7°F) and daytime highs reaching 11°C (52°F). This upward trend continues into March, where the arrival of early spring brings a more moderate climate, with minimums around -13°C (9°F) and maximums attaining up to 19°C (66°F). The progression from stark winter to a gentler spring sets the stage for the warmer months ahead, highlighting Yamagata's distinct seasonal shifts.
In January, Yamagata, Japan, experiences significant rainfall, with an average precipitation of 125 mm (4.9 in) over 21 days. This makes January one of the wetter months, setting the tone for a winter often marked by persistent precipitation. Following January, February and March see slightly lower amounts, at 116 mm and 119 mm, yet the frequency of rainy days remains high, maintaining a consistent wet spell. As spring approaches, the precipitation gradually decreases, but the damp atmosphere lingers. Interestingly, the summer months of July and August bring a notable surge in rainfall, reaching 239 mm and 194 mm, respectively, showcasing a seasonal shift that contrasts with the winter drizzle. Overall, Yamagata's precipitation pattern highlights a dynamic climate where wet winters transition into rainier summers, providing a lush backdrop for this beautiful region.
In January, Yamagata, Japan experiences a high humidity level of 80%, setting the tone for a generally damp start to the year. As winter gives way to spring, humidity gradually decreases, reaching 75% by April before rising again with the onset of summer. The warm months of June through August bring a peak in humidity, soaring to 92%, creating a notably muggy atmosphere. As autumn approaches, humidity levels begin to decrease once more, stabilizing around 80% by December. This cyclical trend highlights Yamagata's variable climate, where winter and summer months are characterized by higher humidity, while spring and autumn offer a slight reprieve.
In January, Yamagata experiences a moderate UV Index of 3, allowing for a burn time of up to 30 minutes under the sun. As winter transitions into spring, the UV Index rises to 5 in February, maintaining a moderate exposure level. However, a notable shift occurs in March with the index climbing to 7, categorized as high, which shortens safe exposure to 25 minutes. This upward trend continues into the spring months, peaking at 9 in April and reaching a very high 10 in May and June, where sunbathers can only safely enjoy the sun for 15 minutes. The summer months bring the highest dangers, with July and August displaying an extreme UV Index of 11, limiting safe exposure to just 10 minutes. As fall approaches, the index gradually decreases; it dips to 9 in September and continues to decline to 6 in October before settling back to moderate levels of 4 in November and 3 in December. For those planning outdoor activities, staying informed about the UV Index is crucial throughout the year. For more detailed information, please visit Yamagata UV Index.
UV Risk Categories
In January, Yamagata, Japan experiences a modest 159 hours of sunshine, setting the stage for a gradual increase in daylight as the year unfolds. By February, sunshine hours rise to 208, hinting at the approaching warmth of spring. March and April see a significant leap, reaching 251 and 267 hours respectively, as nature awakens and the days grow longer. May shines brightest with 295 hours, marking the peak of spring's brilliance before summer begins. As the months progress into June and July, the sunshine hours slightly decline to 283 and 264, suggesting a balance between golden rays and the lush greenery. The trend continues with a slight dip through August and into the fall months, where September offers 248 hours of sunlight, and October and November provide a gentle 211 and 213 hours respectively. December brings a return to colder days and shorter hours, closing the year with 189 hours of sunshine. Overall, Yamagata's yearly sunshine pattern showcases a vibrant transition from the winter's hush to the energizing light of spring and the mellow glow of autumn.
In Yamagata, Japan, the chances of enjoying sunny weather in January hover around a modest 21%, marking it as one of the least favorable months for sunshine. As the seasons shift into February, the likelihood of seeing the sun increases to 29%, indicating a gradual transition towards more favorable winter weather. March and April further demonstrate this upward trend, with sunny days peaking at 38% in April. This pattern highlights the region's tendency for cloudy and cool conditions during the peak winter months, shifting to more agreeable weather as spring approaches. Though the chances of sun fluctuate throughout the year, January remains firmly anchored in the colder, gloomier months, making those rare sunny days all the more cherished.
In Yamagata, Japan, January greets residents with just 9 hours of daylight, a stark contrast to the sunnier days ahead. As February rolls in, daylight increases to 10 hours, signaling the gradual return of longer days. This upward trend continues through the spring, where March gifts 11 hours and April blossoms into 13 hours of sunlight. By May, daylight peaks at 14 hours, a duration that persists through June and July, allowing ample time for outdoor activities. As summer fades into autumn, daylight starts to wane, dropping to 13 hours in August and gently tapering off to 12 hours in September, before settling back to 11 hours in October. November and December bring a return to shorter days, with daylight dwindling back to 10 hours and finally 9 hours again. This rhythmic ebb and flow of daylight emphasizes the seasons' transformation, shaping daily life and activities in Yamagata.
In January, the average wind speed in Yamagata, Japan, hovers around 2.5 m/s (6 mph), marking a time when the cold winter air begins to stir. As the year progresses into February, wind speeds slightly increase to 3.2 m/s (7 mph), creating a brisk atmosphere that enhances the region's wintry charm. March brings a slight decrease back to 2.6 m/s (6 mph), followed by a gentle rise in April at 2.7 m/s (6 mph), hinting at spring's approach. However, by May, the winds calm to 2.4 m/s (5 mph), reflecting the transition to warmer months. The summer months of June and July retreat into tranquil breezes of around 1.6 m/s (3 mph) and 1.4 m/s (3 mph), respectively, before a modest resurgence in August at 1.7 m/s (4 mph). The wind remains mild throughout the fall, gradually increasing toward winter again, with December recording 2.7 m/s (6 mph). This cyclical pattern showcases Yamagata’s atmospheric dance, oscillating between crisp winter winds and gentle summer breezes.
Weather in Yamagata varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Yamagata, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February in Yamagata display similar cold weather patterns, though February offers slightly milder conditions. In January, temperatures can plunge to a minimum of -16°C (4°F) with an average of -2°C (29°F) and a maximum of 8°C (46°F). The month sees about 125 mm (4.9 in) of precipitation over 21 days, accompanied by an 80% humidity level. Conversely, February features a minimum temperature of -14°C (7°F), an average of -1°C (31°F), and a maximum of 11°C (52°F). Precipitation slightly decreases to 116 mm (4.5 in) over 20 days, with humidity at 79%. For more detailed information on February weather in Yamagata, visit Yamagata weather in February.
In January, the weather in Yamagata is quite chilly, with temperatures ranging from a minimum of -16°C (4°F) to a maximum of 8°C (46°F) and an average of -2°C (29°F). The month experiences considerable precipitation of 125 mm (4.9 in) spread over 21 days, accompanied by high humidity at 80%. In contrast, March brings a noticeable shift, with temperatures rising to a minimum of -13°C (9°F) and a pleasant maximum of 19°C (66°F), resulting in an average temperature of 4°C (39°F). Precipitation slightly decreases to 119 mm (4.7 in) over 18 days, and humidity also dips to 77%. For more detailed insights, check out Yamagata weather in March.
January and April in Yamagata present a stark contrast in weather conditions. January is characterized by frigid temperatures, with a minimum of -16°C (4°F) and an average of -2°C (29°F), making it one of the coldest months of the year. In addition to the chill, January experiences significant precipitation at 125 mm (4.9 in) over 21 days, with humidity levels at 80%. On the other hand, April marks a transition to milder weather, featuring a minimum temperature of -5°C (24°F) and an average of 8°C (47°F), soaring to a pleasant maximum of 25°C (77°F). Precipitation decreases slightly to 116 mm (4.6 in) over 13 days, and humidity drops to 75%. This shift highlights the arrival of spring, making April a much more inviting month. For more details, visit Yamagata weather in April.
January and May present strikingly different weather patterns. In January, temperatures range from a frigid minimum of -16°C (4°F) to a maximum of 8°C (46°F), with an average of -2°C (29°F). The month is marked by significant precipitation, totaling 125 mm (4.9 in) over 21 days, coupled with high humidity at 80%. In contrast, May brings a significant warming trend, with temperatures ranging from a minimum of 2°C (36°F) to a comfortable maximum of 31°C (88°F), averaging 15°C (59°F). Although May sees slightly less precipitation at 93 mm (3.7 in) over 13 days, humidity remains steady at 80%. For more details on May weather, check out Yamagata weather in May.
January and June present stark contrasts in weather conditions. In January, temperatures can plummet to a minimum of -16°C (4°F), with an average temperature of -2°C (29°F) and maximums reaching 8°C (46°F). Precipitation is frequent, falling on 21 days and totaling 125 mm (4.9 in), accompanied by humidity levels around 80%. Conversely, June brings a much milder climate, with temperatures ranging from a minimum of 7°C (44°F) to a maximum of 32°C (90°F) and an average of 19°C (66°F). Precipitation decreases to 98 mm (3.8 in) over 13 days, while humidity rises slightly to 87%. For more specific information about June weather in Yamagata, you can visit Yamagata weather in June.
In January, Yamagata experiences frigid temperatures, with a minimum of -16°C (4°F) and an average around -2°C (29°F), while maximums reach only 8°C (46°F). The winter month brings substantial precipitation, totaling 125 mm (4.9 in) over 21 days, paired with high humidity levels at 80%. In contrast, July presents a much warmer climate, with temperatures ranging from a minimum of 14°C (57°F) to an average of 23°C (73°F) and maximums soaring to 33°C (92°F). Although July has more precipitation, totaling 239 mm (9.4 in) across 18 days, it is accompanied by even higher humidity at 92%. For a more detailed look, you can check out Yamagata weather in July.
The weather in January contrasts sharply with that of August. In January, temperatures are quite frigid, with lows reaching -16°C (4°F) and an average of -2°C (29°F), while precipitation occurs on 21 days, totaling 125 mm (4.9 in) and an 80% humidity level. In stark contrast, August boasts much warmer temperatures, with a minimum of 12°C (53°F) and an average of 24°C (75°F), peaking at a scorching 36°C (97°F). Although August experiences more precipitation, with 194 mm (7.6 in) over 18 days, the humidity rises to 92%, adding to the summer's sweltering heat. To learn more about August weather specifics, you can check Yamagata weather in August.
January and September in Yamagata present a striking contrast in weather. In January, the temperatures are quite frigid, ranging from a minimum of -16°C (4°F) to a maximum of 8°C (46°F), with an average of -2°C (29°F). The month also sees significant precipitation, with around 125 mm (4.9 in) over 21 days and humidity levels at 80%. In contrast, September boasts much milder conditions, with temperatures ranging from a minimum of 7°C (44°F) to a scorching maximum of 33°C (91°F) and an average of 19°C (67°F). The month receives slightly less precipitation at 110 mm (4.3 in) over 14 days, while the humidity remains high at 86%. For more detailed insights, check Yamagata weather in September.
January and October in Yamagata exhibit striking differences in weather patterns. January tends to be much colder, with temperatures ranging from a chilling minimum of -16°C (4°F) to a maximum of 8°C (46°F), while October offers milder conditions, boasting an average temperature of 13°C (56°F) and peaks reaching 27°C (81°F). Precipitation is more frequent in January, occurring on 21 days with a total of 125 mm (4.9 in), compared to 13 days of rain in October, which accumulates to 151 mm (5.9 in). Humidity levels are similarly high in both months, at 80% in January and 82% in October, creating a damp atmosphere. For more details on October weather, you can visit Yamagata weather in October.
In January, the weather is significantly colder, with temperatures ranging from a minimum of -16°C (4°F) to a maximum of 8°C (46°F), and an average temperature of -2°C (29°F). This month sees considerable precipitation, totaling 125 mm (4.9 in) over 21 days, along with high humidity at 80%. In contrast, November experiences milder temperatures, with a minimum of -6°C (22°F) and a maximum of 21°C (70°F), resulting in a more pleasant average of 7°C (45°F). Precipitation in November is lower at 80 mm (3.1 in), spread across 14 days, with slightly less humidity at 79%. For more details on the weather specifics during this month, check out Yamagata weather in November.
In January, the weather is notably colder than in December, with average temperatures dropping to -2°C (29°F) compared to 1°C (34°F) in December. While both months experience high humidity levels of 80%, January typically sees lower maximum temperatures, peaking at just 8°C (46°F) versus December's higher maximum of 16°C (62°F). Precipitation is also prevalent in both months, with January receiving 125 mm (4.9 in) across 21 days, slightly less than December's 146 mm (5.7 in) over 23 days. For more details, visit Yamagata weather in December.
In January, Yamagata experiences a striking contrast to the warmer months, characterized by chilly temperatures and persistent precipitation. As the winter chill settles in, average temperatures plummet, often dropping well below freezing, and the landscape transforms under a blanket of snow. With nearly two-thirds of the month seeing damp conditions, this adds to the atmospheric crispness, contributing to the region’s renowned hum of winter activities. Humidity hovers around 80%, making the cold feel even more pronounced. For those looking to understand this seasonal shift, detailed insights can be found at Yamagata Climate.