Last updated: August 21, 2025
January in Kusatsu, Japan is characterized by a chill in the air and a touch of winter's beauty. With maximum temperatures reaching 15°C (60°F) and hovering around an average of 4°C (39°F), it’s a month for bundling up. The frosty nights bring lows down to -7°C (20°F), creating a picturesque winter landscape. Visitors can expect moderate precipitation, with 52 mm (2.0 in) of rainfall spread across 8 days, contributing to the area's enchanting winter atmosphere. The high humidity level of 82% can make the cold feel even more pronounced, allowing for the unique experience of Kusatsu's famous hot springs to shine as a warming retreat from the winter chill.
In January, Kusatsu, Japan experiences a winter chill, with temperatures ranging from a brisk -7°C (20°F) at night to a mild 15°C (60°F) during the day. The average temperature sits comfortably at 4°C (39°F), providing a stark contrast to the warmer months that follow. As February rolls in, temperatures see a slight uptick, with nighttime lows of -6°C (21°F) and daytime highs peaking at 19°C (67°F). This gradual but noticeable increase hints at the transition towards spring, with early signs of warmth beginning to emerge by March, where the average climbs to 9°C (49°F). Throughout this month, the variation between night and day highlights the pronounced seasonal shifts Kusatsu enjoys, making January a key player in the region's thermodynamic narrative.
In Kusatsu, Japan, January ushers in a relatively mild precipitation total of 52 mm (2.0 in), falling over about 8 days of the month. This establishes a trend of gradually increasing rainfall as winter transitions into spring, with February seeing a slight uptick to 59 mm (2.3 in), maintaining a similar number of wet days. The month of March marks a significant jump in precipitation, escalating to 116 mm (4.6 in), hinting at the impending arrival of the spring thaw. As the year progresses, the overall trend suggests an increasing volume of rain, particularly peaking dramatically in the summer months, with July receiving an impressive 253 mm (10.0 in). This cyclical pattern not only influences the climate but also enriches Kusatsu’s vibrant landscapes, making it a picturesque destination through the changing seasons.
In Kusatsu, Japan, January sets the stage for a month characterized by high humidity, averaging around 82%. This level of moisture in the air is typical for winter, as the region transitions out of frosty conditions. Interestingly, humidity begins to taper off slightly in February but rises again by May, reaching its peak during the sweltering summer months, where values soar to 93% in July. As the year progresses, the humidity begins to decrease, stabilizing around 83% in the winter months of November and December. This cyclical pattern highlights Kusatsu's unique climate, where winter's crispness gives way to the humid warmth of summer, creating a dynamic atmospheric experience throughout the year.
In Kusatsu, Japan, January sees a moderate UV Index of 4, allowing for approximately 30 minutes of safe sun exposure without sunscreen. As the months progress, the UV intensity steadily increases, with February rising to 6, and March and April jumping to 8 and 10 respectively, indicating a shift to very high exposure levels. The peak of the UV Index occurs during the summer months, from May through August, where the index reaches an extreme 11, drastically reducing safe sun exposure time to just 10 minutes. This trend highlights the importance of being vigilant about sun protection, especially as spring transitions into the intense sun of summer. As the year winds down, the UV Index dips again, with November and December returning to moderate levels, making them more forgiving months for outdoor activities. For more detailed information, check the full UV Index data for Kusatsu here.
UV Risk Categories
January shines with 177 hours of sunlight in Kusatsu, Japan, laying the groundwork for brighter days ahead. As winter gives way to spring, sunlight steadily increases, peaking in May with an impressive 282 hours. The transition from January’s crisp chill to the sun-drenched days of summer illustrates an uplifting trend: each month gradually accumulates more sunlight, with August boasting 292 hours. Even as autumn arrives, the city maintains a respectable glow, with October and November recording 230 and 228 hours respectively. This rhythmic pattern of light not only marks the passage of time but also enriches the beauty of Kusatsu throughout the year.
In Kusatsu, Japan, January offers a 47% chance of sunny weather, mirroring the conditions of February but showing a notable decline in March with only 36% likelihood. As winter transitions to spring, the chances of sunshine fluctuate, peaking in October at 48% and showing promise again in November with 52%. This trend suggests that while January brings a decent sprinkle of sunny days, the real opportunities for clear skies begin to emerge later in the year, particularly as the seasons shift towards warmth.
In Kusatsu, Japan, January marks the beginning of a gradual shift in daylight duration, offering around 10 hours of daylight. This consistency in January and February hints at a slow transition as spring approaches, with daylight extending slightly to 11 hours by March. The arrival of April amplifies this change, bringing 13 hours of beautiful daylight, which persists through May, fostering a vibrant atmosphere as nature awakens. As summer rolls in, daylight reaches its zenith with 14 hours in June and July, perfect for outdoor activities under the sun. However, as August fades into September, day length begins to taper off, reflecting a gradual descent back to 12 hours and further reducing to 11 hours in October. The cycle completes itself in November, returning to 10 hours, and heads into December, where daylight shrinks to a brisk 9 hours, inviting longer nights and the charm of winter. This rhythmic ebb and flow of daylight not only defines the seasons but also shapes the lifestyle and activities of Kusatsu's residents.
In Kusatsu, Japan, the January wind presents a gentle embrace with an average speed of 2.9 m/s (6 mph), setting a tranquil tone for the winter month. As the year progresses, February sees a slight rise to 3.2 m/s (7 mph), offering a whisper of briskness, while March and April maintain comparable speeds of 3.1 m/s and 3.0 m/s, respectively. Interestingly, the winds begin to calm in May, dropping to 2.7 m/s, and continue their descent through the summer months, reaching a low of 2.1 m/s in both July and June. As autumn approaches, there’s a modest uptick, with wind speeds crawling back to 2.5 m/s in November before closing the year at 2.8 m/s in December. This subtle fluctuation paints a picture of Kusatsu’s serene, yet dynamic atmosphere throughout the seasons, with January serving as the soft introduction to a year of gentle winds.
Weather in Kusatsu varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Kusatsu, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February present relatively similar weather patterns, with January experiencing slightly cooler temperatures. In January, the minimum temperature dips to -7°C (20°F), while February sees a milder minimum of -6°C (21°F). The average temperatures rise from 4°C (39°F) in January to 5°C (41°F) in February, with February reaching a maximum of 19°C (67°F), compared to January's 15°C (60°F). Precipitation is slightly higher in February at 59 mm (2.3 in), whereas January records 52 mm (2.0 in), with both months experiencing precipitation on about 8 days. Furthermore, humidity remains relatively stable, at 82% in January and 79% in February. For more detailed weather insights, you can check the following link: Kusatsu weather in February.
January's weather is notably colder, with minimum temperatures dropping to -7°C (20°F) and an average of 4°C (39°F). The month experiences 52 mm (2.0 in) of precipitation over about 8 days, coupled with a high humidity of 82%. In contrast, March sees a significant rise in temperatures, with a minimum of -3°C (27°F) and an average of 9°C (49°F), peaking at 23°C (73°F). This month also brings more rain, totaling 116 mm (4.6 in) over 11 days, though the humidity decreases to 74%. Overall, March is milder and wetter than January, marking the transition into spring. For more details, visit Kusatsu weather in March.
January and April weather showcase a significant transformation as winter gives way to spring. In January, temperatures range from a chilly -7°C (20°F) at their lowest to a mild 15°C (60°F) at their peak, with an average temperature of 4°C (39°F). The month typically experiences around 52 mm (2.0 in) of precipitation over about 8 days, accompanied by high humidity at 82%.
Conversely, April brings a notable warming trend, with temperatures ranging from a low of -1°C (31°F) to a high of 27°C (80°F) and an average of 14°C (57°F). However, it also sees increased precipitation, totaling 138 mm (5.4 in) over approximately 10 days, with humidity slightly lower at 76%. For further details on April weather, you can visit Kusatsu weather in April.
In January, weather conditions are notably colder, with temperatures ranging from a minimum of -7°C (20°F) to a maximum of 15°C (60°F) and an average of 4°C (39°F). The month experiences about 52 mm (2.0 in) of precipitation over roughly 8 days, coupled with a relatively high humidity of 82%. In contrast, May brings a dramatic temperature increase, where the minimum is 6°C (43°F), the average reaches 19°C (66°F), and the maximum can soar to 32°C (89°F). This month also sees a higher total rainfall of 144 mm (5.7 in) spread across 11 days, with humidity slightly increasing to 83%. For more detailed insights about May weather, you can check Kusatsu weather in May.
In January, Kusatsu experiences cold temperatures with a minimum of -7°C (20°F) and an average of 4°C (39°F), peaking at 15°C (60°F). The month sees about 52 mm (2.0 in) of precipitation over 8 days, accompanied by a relatively high humidity level of 82%. In stark contrast, June brings a significant warming trend, with temperatures ranging from a minimum of 11°C (52°F) to an average of 22°C (72°F) and a maximum reaching 32°C (90°F). The month is also wetter, with 141 mm (5.6 in) of precipitation spread over 12 days, and humidity climbs slightly to 87%. For more detailed information, check out Kusatsu weather in June.
In January, temperatures in Kusatsu range from a chilly -7°C (20°F) to a mild 15°C (60°F), with an average temperature of 4°C (39°F). The month experiences about 52 mm (2.0 in) of precipitation over approximately 8 days, accompanied by a humidity level of 82%. In stark contrast, July brings much warmer weather, with minimum temperatures around 19°C (66°F) and maximums soaring to 37°C (98°F). The average temperature in July is a pleasant 26°C (80°F), but the month is significantly wetter, receiving 253 mm (10.0 in) of rainfall over about 19 days, accompanied by high humidity levels reaching 93%. For more specific details about the weather, visit Kusatsu weather in July.
January and August present stark contrasts in weather conditions. In January, temperatures hover between a chilly -7°C (20°F) and a mild 15°C (60°F), with an average of 4°C (39°F). The month experiences around 52 mm (2.0 in) of precipitation over 8 days, accompanied by high humidity at 82%. In contrast, August showcases a much warmer climate, with temperatures ranging from a minimum of 18°C (65°F) to a sweltering maximum of 38°C (101°F) and an average of 28°C (83°F). This summer month sees significantly more precipitation at 168 mm (6.6 in), occurring on 12 days, while humidity increases to 91%. For a detailed look at August weather, check out Kusatsu weather in August.
January and September present stark contrasts in weather conditions. In January, temperatures range from a chilly minimum of -7°C (20°F) to a mild maximum of 15°C (60°F), with an average of 4°C (39°F). The month experiences 52 mm (2.0 in) of precipitation over approximately 8 days, and humidity levels sit around 82%. In contrast, September offers much warmer temperatures, with a minimum of 14°C (57°F) and a maximum reaching 35°C (96°F), averaging 24°C (75°F). This month sees significantly higher rainfall at 136 mm (5.4 in) spread over 13 days, accompanied by slightly higher humidity of 87%. For more information, you can check Kusatsu weather in September.
In January, temperatures in Kusatsu generally range from a chilly -7°C (20°F) at night to a mild 15°C (60°F) during the day, with an average temperature of 4°C (39°F). The month experiences around 52 mm (2.0 in) of precipitation over about 8 days, combined with a humidity level of 82%, creating a crisp and cold atmosphere.
In contrast, October brings much warmer temperatures, with a minimum of 7°C (45°F) and a maximum reaching up to 33°C (92°F), averaging around 18°C (65°F). This month sees significantly higher precipitation, totaling 227 mm (8.9 in) over 13 days, and a slightly elevated humidity level of 85%. For more details on the specific weather patterns, you can check Kusatsu weather in October.
Overall, October presents a much warmer and wetter climate compared to the cold and dry conditions typically experienced in January.
In January, the weather is much colder, with temperatures ranging from a minimum of -7°C (20°F) to a maximum of 15°C (60°F) and an average of 4°C (39°F). The month witnesses about 52 mm (2.0 in) of precipitation over 8 days, maintaining a humidity level of 82%. In contrast, November offers milder weather, featuring minimum temperatures of -1°C (31°F) and maximums reaching 25°C (77°F), with an average of 12°C (54°F). It also tends to be drier, with only 41 mm (1.6 in) of precipitation across 5 days and a slightly higher humidity of 83%. For more details on November conditions, you can visit Kusatsu weather in November.
When comparing the weather in January and December, both months experience similar minimum temperatures, hovering around -7°C (20°F). However, January tends to be cooler on average, with a temperature of 4°C (39°F), compared to December’s warmer average of 6°C (44°F). The maximum temperatures in December can reach up to 22°C (72°F), significantly higher than January's peak of 15°C (60°F). Additionally, December sees slightly more precipitation at 63 mm (2.5 in) compared to January's 52 mm (2.0 in), although both months experience rainfall on about 8 days. Humidity levels are fairly consistent, with January at 82% and December at 83%. For a closer look at the conditions in December, you can check Kusatsu weather in December.
As January unfolds in Kusatsu, the weather takes on a distinctly colder character compared to other months. Temperatures can dip to chilling lows, making the average feel significantly brisk at around 4°C (39°F). With humidity levels reaching 82%, the air often feels damp, especially during the eight days when precipitation graces the region. This contrasts sharply with the warmer, drier months that follow. Those visiting during this time can expect a refreshing and invigorating atmosphere, perfect for enjoying Kusatsu’s renowned hot springs. For more detailed insights on how January stacks up against the rest of the year, check out Kusatsu Climate.