Last updated: August 21, 2025
In Koshi, Japan, January brings a blend of crisp winter air and occasional rainfall. With a maximum temperature reaching 17°C (63°F) and an average hovering around 6°C (42°F), this month showcases the typical chill of the season. Nighttime temperatures can dip as low as -5°C (24°F), inviting cozy evenings indoors. While January sees some precipitation, accumulating around 54 mm (2.1 in) over 6 days, the humidity remains relatively high at 75%, adding a touch of dampness to the winter atmosphere. Whether you're exploring the picturesque scenery or enjoying the warmth of local cuisine, Koshi's January weather offers a unique mix of experiences.
January in Koshi, Japan, ushers in a distinct chill, with temperatures dipping to a minimum of -5°C (24°F). The month sees a comfortable average of 6°C (42°F), peaking at a pleasant 17°C (63°F) on warmer days. This cold snap acts as a prelude to the milder February temperatures, which start to trend upwards, reaching a maximum of 20°C (69°F). The shift from winter into early spring becomes increasingly evident as the average temperature steadily rises through March to 11°C (52°F) and begins to break the 0°C mark for daily lows, suggesting a gradual transition towards more temperate conditions. Overall, January sets a cold tone that slowly paves the way for the upcoming warmth, establishing a rhythm in Koshi's climate patterns that reflects the gradual thaw of winter into spring.
In January, Koshi, Japan experiences a modest precipitation amount of 54 mm (2.1 in), typically spread over just six days. This marks the beginning of a remarkable trend, as precipitation gradually increases with each passing month, peaking dramatically in July with a staggering 478 mm (18.8 in) over 20 days of rain. The early winter months like January and February feature relatively low rainfall, but as spring arrives, the moisture builds, with March and April seeing noticeable increases. By May, the wet season commences in earnest, leading to the highest accumulation in the summer months. This seasonal shift highlights Koshi's transition from a relatively dry January to its lush, rain-soaked July, showcasing the dynamic weather patterns that define this region.
In January, Koshi, Japan, experiences a humidity level of 75%, setting the stage for a winter characterized by crisp air and potential chill. As the seasons shift toward spring, humidity tends to dip slightly in February and March, both hovering around 71%; however, this brief respite is followed by a notable rise in April, where the humidity leaps to 78%. The real surge begins in late spring, reaching a peak of 92% in July, as the summer months envelop the region in a humid embrace, maintaining levels above 90% through August. This high humidity persists into the early fall, tapering off gradually to 84% in September, and remaining relatively high during October and November at 83% and 81%, respectively. By December, humidity eases back to 79%, wrapping up the year with a hint of winter's return. Overall, Koshi's humidity trends illustrate a dynamic seasonal pattern, with the region feeling significantly wetter during the warmer months while offering a more comfortable atmosphere in the winter.
In Koshi, Japan, January brings a moderate UV Index of 4, with a burn time of approximately 30 minutes. As the months progress into February and March, the UV Index escalates to 6 and 8, respectively, indicating a noticeable surge in sun intensity. This trend continues into the spring and summer; by April, the index peaks at 11, marking the onset of extreme exposure conditions that persist until September. Throughout these months, burn times plummet to just 10 minutes, highlighting the importance of sun protection during this period. Interestingly, the UV Index dips back to 6 in November before returning to the moderate levels of 4 in December. For more detailed insights on managing sun exposure, visit Koshi UV Index.
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In Koshi, Japan, the month of January welcomes the year with 178 hours of sunshine, setting a bright tone for the season ahead. As winter transitions to spring, daylight steadily increases, peaking in May with 283 hours of golden rays. The sun continues to shine brilliantly during the summer months, most notably in August, when Koshi basks in 294 hours of sunlight—its highest for the year. Interestingly, as the year winds down, sunshine hours decline, dropping to 218 hours in December, highlighting the seasonal rhythm of this charming locale. Overall, the data reveals a vibrant cycle where warmth and light swell in intensity, inviting both adventure and tranquility in this beautiful region.
In Koshi, Japan, January marks a 41% chance of sunny weather, setting the tone for the year ahead. This likelihood is relatively stable compared to the following month, February, which sees a slight increase to 44%. However, as spring approaches, the chances dip in March to 37%, only to rise again in April to 43%. The trend reveals a pattern where sunny days are more prevalent during the later months of the year, with October boasting a significant 64% chance. Meanwhile, the summer months can be quite gloomy, highlighted by July's 18%, suggesting that the best chances for sunshine in Koshi are found in the transition months of late autumn and early spring.
In Koshi, Japan, the daylight duration in January spans a steady 10 hours, a trend that persists through February. As winter gives way to spring, the days gradually lengthen, reaching 11 hours in March and 12 hours by April. This upward trend continues, peaking at 14 hours during the vibrant summer months of June and July. As summer wanes into autumn, daylight begins to recede, returning to 13 hours in August and gradually decreasing to 10 hours by November and December. This cyclical pattern reflects the natural rhythm of the seasons, offering residents a dynamic experience of light throughout the year.
In Koshi, Japan, the winds of January beckon with a gentle average speed of 2.5 m/s (6 mph), setting the tone for a winter characterized by mild breezes. This month shows a slight decrease in intensity compared to February, which experiences a modest uptick to 2.8 m/s (6 mph). Interestingly, as winter transitions into spring, the wind speed stabilizes around 2.4 to 2.5 m/s, indicating a consistent pattern as nature prepares for the seasonal shift. The trend reveals a gradual decline in wind strength heading into summer, dropping to 1.6 m/s (4 mph) in June, only to recover slightly in July and August before tapering down again in the fall. Overall, the wind patterns in Koshi illustrate a rhythmic ebb and flow, echoing the serene cycles of nature throughout the year.
Weather in Koshi varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Koshi, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit similar minimum temperatures, both reaching lows of -5°C (24°F). However, February sees a slight increase in the average temperature, rising to 7°C (44°F), compared to January's 6°C (42°F), and achieving a higher maximum of 20°C (69°F) versus January's 17°C (63°F). Precipitation is more pronounced in February, with 96 mm (3.8 in) recorded over 10 days, compared to January’s 54 mm (2.1 in) across 6 days. The humidity is slightly lower in February at 71% compared to January's 75%. For more detailed insights, you can check the link: Koshi weather in February.
In January, the weather is characterized by cooler temperatures, with a minimum of -5°C (24°F) and an average of 6°C (42°F), making it decidedly wintery. Precipitation is moderate at 54 mm (2.1 in) over 6 days, accompanied by a relatively high humidity of 75%. In contrast, March sees a significant warming trend, with minimum temperatures around -1°C (30°F) and an average rise to 11°C (52°F). The maximum temperature can reach up to 24°C (75°F), reflecting a more spring-like atmosphere. However, March experiences more rain, totaling 131 mm (5.2 in) spread across 12 days, while humidity lowers slightly to 71%. For a more detailed view of weather conditions in March, you can refer to Koshi weather in March.
January and April present quite contrasting weather conditions. In January, temperatures typically range from a chilly -5°C (24°F) to a mild 17°C (63°F), with an average of 6°C (42°F). The month experiences about 54 mm (2.1 in) of precipitation over six days, accompanied by a humidity level of 75%. In stark contrast, April sees more moderate temperatures, with lows of 1°C (34°F) and highs reaching up to 28°C (82°F), resulting in an average temperature of 15°C (59°F). Additionally, April is wetter, receiving approximately 132 mm (5.2 in) of rain over nine days and slightly higher humidity at 78%. For more insights into April's weather, you can check this link: Koshi weather in April.
In January, temperatures range from a chilly -5°C (24°F) to a mild 17°C (63°F), with an average of 6°C (42°F), accompanied by moderate humidity levels at 75%. The month sees around 54 mm (2.1 in) of precipitation over approximately six days. In stark contrast, May brings significantly warmer weather, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 30°C (86°F) and an average temperature of 19°C (67°F). Additionally, May experiences higher precipitation levels of 213 mm (8.4 in) over 12 days, and humidity rises to 84%. For more details, you can check out Koshi weather in May.
January and June showcase stark contrasts in weather. In January, temperatures range from a chilly -5°C (24°F) to a mild 17°C (63°F), with an average of 6°C (42°F). The month experiences around 54 mm (2.1 in) of precipitation over about 6 days, complemented by a humidity level of 75%. In contrast, June brings warmer temperatures, with lows of 13°C (55°F) and highs peaking at 32°C (89°F), averaging 23°C (73°F). Rainfall significantly increases to 274 mm (10.8 in) over 15 days, and humidity rises to 86%. For more detailed insights, check out Koshi weather in June.
January brings a chill with temperatures ranging from a minimum of -5°C (24°F) to a maximum of 17°C (63°F), accompanied by an average temperature of 6°C (42°F). The month sees moderate precipitation of 54 mm (2.1 in) over about 6 days, with a humidity level of 75%, making it feel quite brisk. In stark contrast, July experiences a warm climate with temperatures soaring from a minimum of 17°C (63°F) to a high of 35°C (96°F), and an average temperature of 26°C (79°F). Rainfall is significantly higher in July at 478 mm (18.8 in) spread over 20 days, and humidity levels rise to 92%, resulting in a notably muggy atmosphere. For more detailed insights about the weather in July, you can check Koshi weather in July.
January and August present starkly contrasting weather patterns. In January, temperatures range from a minimum of -5°C (24°F) to a maximum of 17°C (63°F), with an average of 6°C (42°F). The month is generally cold, with six days of precipitation totaling 54 mm (2.1 in) and a humidity level of 75%. In contrast, August experiences much warmer conditions, featuring temperatures that range from a minimum of 18°C (65°F) to a sweltering maximum of 35°C (96°F), with an average temperature of 28°C (82°F). This summer month is also quite wet, receiving 277 mm (10.9 in) of rain over 15 days and a higher humidity of 91%. For more detailed insights on August weather, you can visit Koshi weather in August.
In January, the weather is characterized by much cooler temperatures, with a minimum of -5°C (24°F) and a maximum of 17°C (63°F), leading to an average temperature of 6°C (42°F). The month experiences less precipitation, totaling 54 mm (2.1 in) over just 6 days, accompanied by a humidity level of 75%. In stark contrast, September showcases a warmer climate, featuring a minimum temperature of 12°C (53°F) and peaking at 34°C (94°F), resulting in a significantly higher average temperature of 24°C (76°F). Precipitation during September is more frequent and abundant, reaching 184 mm (7.2 in) over 14 days, with humidity increasing to 84%. For more details, check out Koshi weather in September.
January and October present starkly contrasting weather conditions. In January, temperatures range from a chilly -5°C (24°F) to a maximum of 17°C (63°F), with an average of 6°C (42°F), accompanied by relatively low humidity at 75%. This month sees about 54 mm (2.1 in) of precipitation over approximately 6 days. In contrast, October boasts much warmer temperatures, with a minimum of 6°C (44°F) and a high of 31°C (88°F), averaging 19°C (66°F). This month also experiences higher humidity at 83% and more rainfall, totaling 107 mm (4.2 in) across about 8 days. For more insights on October weather, you can visit Koshi weather in October.
In comparing January and November weather, November generally presents milder temperatures and slightly increased humidity. January experiences a broader temperature range, with minimums dropping down to -5°C (24°F) and maximums reaching 17°C (63°F). In contrast, November's temperatures are more moderate, ranging from -1°C (30°F) to a maximum of 25°C (77°F). While both months receive comparable amounts of precipitation, January’s 54 mm (2.1 in) falls on about 6 days, whereas November sees 60 mm (2.4 in) over 7 days. This trend in precipitation, combined with the higher humidity of 81% in November compared to January's 75%, makes November feel even more damp and comfortable. For more detailed weather insights, you can check out the specific information here: Koshi weather in November.
In comparing January and December weather, January tends to be colder, with minimum temperatures dropping to around -5°C (24°F) compared to December's milder low of -2°C (29°F). The average temperature in January is slightly lower at 6°C (42°F) versus December's 7°C (45°F), and January sees a maximum temperature of 17°C (63°F), which is notably less than December's higher peak of 22°C (72°F). Precipitation is also a factor; January receives 54 mm (2.1 in) over 6 days, while December has a higher total of 71 mm (2.8 in) over 7 days. Both months experience high humidity, but January's average humidity is slightly lower at 75% compared to December's 79%. For more insights on December weather, you can visit Koshi weather in December.
January in Koshi brings a distinct chill compared to milder months, with temperatures dipping significantly, creating a cozy atmosphere perfect for winter activities. Precipitation becomes more frequent during this month, with several rainy days contributing to the region's lush landscapes. Coupled with high humidity levels, these conditions make for a refreshing start to the year. If you're planning a visit or just curious about what to expect, you can find more detailed insights at Koshi Climate.