Last updated: August 21, 2025
In January, Oshu, Japan experiences a chilly climate, with temperatures ranging from a maximum of 7°C (45°F) to a biting minimum of -22°C (-8°F), leading to an average temperature of -2°C (30°F). The city sees about 56 mm (2.2 in) of precipitation over 12 days, adding to the winter ambience. Coupled with humidity levels around 80%, this month encapsulates the essence of a frosty Japanese winter, making it a unique time to visit for those who embrace the cold.
In Oshu, Japan, the temperatures in January showcase a striking winter chill, with minimums plummeting to a brisk -22°C (-8°F) and an average around -2°C (30°F). This cold snap marks the heart of winter, where the maximum temperature hovers around 7°C (45°F), hinting at brief respites from the chill during the day. As the month transitions into February, temperatures improve slightly, yet the region continues to experience frosty conditions, with minimums in the range of -18°C (0°F). Notably, the progression toward spring reveals a steady upward trend, as temperatures gradually increase through March and April, culminating in much milder weather by May, where averages reach a comfortable 14°C (58°F). Overall, January serves as a defining moment in Oshu's climate, encapsulating the stark beauty of its coldest month while laying the foundation for the warmer seasons to come.
In January, Oshu, Japan experiences an average precipitation of 56 mm (2.2 in), falling over 12 days. While this marks the start of the year with relatively modest rainfall, it sets the tone for the coming months when precipitation gradually increases, peaking in **July with a significant 182 mm (7.2 in). The trend shows that as winter gives way to spring, rainfall intensifies, particularly between March and June. The winter months tend to be drier, with January and November each recording 56 mm, while July and August often bring the most rain, contributing to Oshu's lush landscapes. Overall, the data highlights a clear seasonal pattern of increasing moisture, allowing for vibrant natural growth throughout the year.
In January, Oshu, Japan, experiences a notable humidity level of 80%, setting the stage for a typically damp winter atmosphere. As the month transitions into February, humidity remains relatively stable at 79%, indicating a consistent winter climate. However, as spring approaches in March and April, humidity begins to gradually decline to 77% and 75%, respectively, bringing a hint of dryness. The onset of May sees humidity rising back to 80%, signaling the return of moisture before the summer months hit. From June through August, humidity peaks dramatically, reaching an impressive 92%, creating a muggy environment characteristic of a Japanese summer. As the year progresses into September and October, humidity levels start to drop again, settling to 86% and 82% before dipping slightly in November to 79%. Ultimately, December brings a return to a comfortable 80%, closing the year on a balanced note. Overall, Oshu’s humidity patterns showcase a rhythmic cycle, oscillating between higher and lower levels with the changing seasons.
In January, Oshu, Japan, experiences a moderate UV Index of 3, indicating a risk of harm from unprotected sun exposure, with a burn time of approximately 30 minutes. As the months progress towards spring, this index sees a gradual rise, peaking at 9 in May and 10 from June to August, when the risk shifts to very high, and the burn time drastically reduces to just 15 minutes. Despite the winter months maintaining a more manageable level, by March the exposure category escalates to high, reflecting the approaching season's intensity. This upward trend highlights the importance of sun protection as the year unfolds. To learn more about the UV Index and sun safety in Oshu, visit the Oshu UV Index.
UV Risk Categories
January in Oshu, Japan, greets residents and visitors with 165 hours of sunshine, marking the start of the year on a relatively modest note. As the months progress, there's a remarkable increase in sunlight; February enjoys a jump to 218 hours, while March and April see further growth, peaking at 263 hours in April. The sunny trend continues into May, reaching an impressive 290 hours, the highest of the year. After this peak, sunshine hours gradually decline during the summer months but remain fairly stable, with 251 hours in both July and August. The autumn months usher in a gentle decrease, culminating in December's 199 hours. Overall, Oshu experiences a vibrant spectrum of sunlight, with longer days in spring and summer contrasting beautifully against the shorter winter days, inviting the community to savor each season's unique charm.
In Oshu, Japan, the likelihood of sunny weather in January stands at 32%, a figure that reflects a modest chance of clear skies to kick off the year. This percentage is remarkably on par with both March and December, suggesting a consistent pattern of cool, yet occasionally sunny days during the heart of winter. As we transition into February, the chances of sunshine rise to 43%, hinting at a gradual increase in daylight as the seasons shift. Interestingly, the sunniest months, such as November and April, achieve higher probabilities, peaking at 41% and 42% respectively, indicating that while January may not offer the brightest days, the following months suggest a promising trend toward more sunshine, making it an opportune time for those who enjoy a blend of crisp winter air and occasional sunlit moments.
In Oshu, Japan, January marks the beginning of a subtle shift in daylight duration, offering around 9 hours of light as the year kicks off. As February unfolds, daylight gradually increases to 10 hours, hinting at the approaching spring. By March, the days extend further to 11 hours, inviting more outdoor activities with the promise of warmer weather. The momentum continues into April, where daylight peaks at 13 hours, and then remains steady through May and June. Here, the days are at their longest, delivering 14 hours of sunlight that beckon residents to fully embrace the vibrant seasonal changes. As summer transitions to autumn, daylight begins its gentle decline, dropping to 13 hours in August and tapering off to 9 hours again by December. This rhythmic cycle not only highlights the beauty of Oshu's seasons but also suggests a natural cadence to daily life influenced by the shifting light.
In January, the wind in Oshu, Japan, typically blows at an average speed of 2.8 m/s (6 mph), setting a gentle tone for the new year. As winter transitions into early spring, February sees a noticeable uptick, with winds picking up to 3.7 m/s (8 mph), creating brisk days that herald the arrival of warmer weather. However, as March and April roll in, the winds settle again at 3.1 m/s (7 mph), maintaining a steady, moderate pace. May mirrors January's tranquility with another 2.8 m/s average, while summer arrives with milder breezes, dipping to 1.8 m/s (4 mph) in July. Throughout the latter half of the year, wind speeds remain relatively stable, fluctuating between 2.0 and 2.3 m/s, indicating a calm atmosphere as Oshu wraps up the year. This overall trend highlights a winter and early spring vivacity, transitioning into a tranquil summer and fall, showcasing the serene climate of Oshu.
Weather in Oshu varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Oshu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, the weather is characterized by colder temperatures, with a minimum of -22°C (-8°F) and an average of -2°C (30°F). Precipitation is relatively moderate at 56 mm (2.2 in) over approximately 12 days, and humidity levels hover around 80%. In contrast, February brings slightly warmer conditions, with a minimum of -18°C (0°F) and an average of -1°C (31°F), rising to a maximum of 11°C (52°F). Precipitation increases to 69 mm (2.7 in) across 14 days, while humidity remains stable at 79%. The transition from January to February indicates a gradual warming trend, albeit with slightly more frequent precipitation. For more details, you can check out Oshu weather in February.
In January, the weather is significantly colder, with temperatures ranging from a minimum of -22°C (-8°F) to a maximum of 7°C (45°F) and an average of -2°C (30°F). The month experiences around 56 mm (2.2 in) of precipitation across approximately 12 days, accompanied by a high humidity level of 80%. In contrast, March brings a noticeable shift toward milder temperatures, with lows of -12°C (11°F), averages of 4°C (39°F), and highs reaching up to 20°C (68°F). Precipitation increases to 106 mm (4.2 in) over about 14 days, while humidity remains slightly lower at 77%. For more details on March weather, you can visit Oshu weather in March.
January and April present a stark contrast in weather conditions. In January, temperatures plunge, with a minimum of -22°C (-8°F) and an average of -2°C (30°F), while the maximum reaches only 7°C (45°F). The month also sees 56 mm (2.2 in) of precipitation over 12 days and a humidity level of 80%, contributing to the cold and often dreary atmosphere.
In contrast, April experiences a significant warming trend, with minimum temperatures rising to -6°C (21°F) and an average of 8°C (47°F), peaking at a comfortable 25°C (77°F). This month has increased rainfall at 119 mm (4.7 in), occurring over 15 days, along with a slightly lower humidity of 75%. The change in weather marks a transition into spring, making April a more vibrant and pleasant time of year. For more details on April weather, you can check Oshu weather in April.
In January, temperatures in Oshu tend to be quite frigid, with averages around -2°C (30°F) and a maximum of only 7°C (45°F), while lows can plummet to -22°C (-8°F). The month sees approximately 56 mm (2.2 in) of precipitation spread over 12 days, contributing to a chilly and damp atmosphere with a humidity level of 80%.
In stark contrast, May brings a significant warming trend, with average temperatures soaring to around 14°C (58°F) and peaks reaching up to 30°C (87°F). This month also experiences higher precipitation, totaling 114 mm (4.5 in) over 13 days, yet it maintains the same humidity of 80%. For a more detailed look at May weather in Oshu, you can check out Oshu weather in May.
In January, the weather is cold and crisp, with average temperatures hovering around -2°C (30°F) and dipping as low as -22°C (-8°F). Precipitation is relatively low, with about 56 mm (2.2 in) falling over 12 days, while humidity levels sit at 80%. In stark contrast, June brings a much warmer climate, featuring minimum temperatures of 7°C (44°F) and average highs reaching 18°C (65°F), peaking at 30°C (87°F). This month experiences increased rainfall, totaling 129 mm (5.1 in) over 14 days, alongside a slight humidity increase to 87%. For more details on weather conditions during this month, visit Oshu weather in June.
In January, Oshu experiences a frigid winter climate, with temperatures ranging from a chilling -22°C (-8°F) at night to a slightly more bearable average of -2°C (30°F), peaking at 7°C (45°F) during the day. The month sees about 56 mm (2.2 in) of precipitation spread across approximately 12 days, accompanied by high humidity levels of around 80%. In stark contrast, July brings a warm summer environment, with temperatures fluctuating from a mild 14°C (57°F) at night to an inviting average of 22°C (72°F), reaching a maximum of 33°C (92°F). This month is significantly wetter, with 182 mm (7.2 in) of precipitation over about 17 days, paired with even higher humidity at 92%. For more details on the July conditions, you can check Oshu weather in July.
January and August showcase stark contrasts in weather. January is characterized by frigid temperatures, with averages around -2°C (30°F) and a maximum of only 7°C (45°F), while humidity levels hover at 80%. In contrast, August brings warmth, with average temperatures soaring to 23°C (74°F) and highs reaching up to 34°C (94°F). Additionally, August experiences significantly more precipitation, totaling 167 mm (6.6 in) over 18 days, compared to January's 56 mm (2.2 in) over 12 days. For more details on the warm and humid conditions of August, visit Oshu weather in August.
January and September exhibit strikingly different weather patterns. In January, temperatures can plummet to a minimum of -22°C (-8°F) with an average around -2°C (30°F) and a maximum of 7°C (45°F). The month is characterized by considerable cold and humidity, averaging 80%, along with 56 mm (2.2 in) of precipitation spread over 12 days.
Conversely, September brings a much warmer climate, with minimum temperatures around 4°C (39°F) and a pleasant average of 19°C (67°F), peaking at a maximum of 33°C (91°F). This month also sees a significant increase in precipitation, totaling 117 mm (4.6 in) over the same number of rainy days, but with slightly higher humidity at 86%. For more information on the climate during this month, check out Oshu weather in September.
January and October present stark contrasts in weather. In January, temperatures plunge, with a minimum of -22°C (-8°F) and an average of -2°C (30°F), while precipitation averages 56 mm (2.2 in) over 12 days, accompanied by high humidity at 80%. In contrast, October enjoys a milder climate, featuring temperatures that range from a minimum of 0°C (33°F) to a pleasant average of 13°C (55°F) and a maximum of 27°C (80°F). Rainfall increases significantly to 154 mm (6.1 in) over the same 12 days, with humidity slightly rising to 82%. For more detailed information, you can check Oshu weather in October.
January and November present contrasting weather conditions. In January, temperatures are significantly lower, with a minimum of -22°C (-8°F) and an average of -2°C (30°F), compared to November’s milder ranges that dip to a minimum of -4°C (24°F) and peak at an average of 6°C (44°F). Both months experience similar precipitation levels, around 56 mm (2.2 in), but January has more rainy days, totaling 12 as opposed to November's 10 days. Humidity remains relatively high in both months, with January at 80% and November slightly lower at 79%. For a detailed look at November weather, visit Oshu weather in November.
In comparison, January generally experiences colder temperatures than December, with average lows dipping to -2°C (30°F) compared to December's minimum of -10°C (14°F). During January, the average maximum temperature is 7°C (45°F), while December can see highs reaching up to 14°C (58°F). Precipitation is higher in December at 78 mm (3.1 in) over 17 days, while January receives slightly less at 56 mm (2.2 in) on 12 days. Both months maintain a consistent humidity level of 80%. For more detailed information about December conditions, you can visit Oshu weather in December.
As January unfolds in Oshu, the city experiences a distinct chill that sets it apart from the milder months of the year. With temperatures plunging to their lowest points and an average that barely hovers above freezing, this month brings a striking contrast to the more temperate seasons. The air is often heavy with humidity, and the frequent precipitation can transform the landscape into a winter wonderland, albeit with a damp chill. In comparison to the warmer months, January invites residents and visitors alike to embrace the beauty of winter's stark elegance. To delve deeper into Oshu's climate throughout the year, explore Oshu Climate.