Last updated: August 21, 2025
In January, Aso, Japan experiences a captivating winter landscape characterized by a maximum temperature of 16°C (62°F) and a chilly average of 4°C (39°F). The mercury dips to a minimum of -7°C (20°F), inviting chilly breezes that enhance the area's crisp atmosphere. With 58 mm (2.3 in) of precipitation over approximately 6 days, the region’s humidity averages a notable 75%, contributing to its enchanting winter scenery. This combination of cool temperatures and occasional snowfall sets the stage for a serene yet invigorating experience in the heart of Japan's winter.
In Aso, Japan, January brings a crisp chill, with temperatures ranging from a brisk -7°C (20°F) to a mild 16°C (62°F). As the month progresses, average temperatures hover around 4°C (39°F), offering a cool respite after the colder December. This trend of fluctuating temperatures continues into February, where the mercury dips slightly lower during nighttime to -8°C (18°F), yet reaches a comfortable 19°C (67°F) during the day. As winter gives way to early spring, March showcases a comforting rise, moving towards more moderate averages of 9°C (49°F) and daytime highs of 23°C (73°F). Overall, January serves as a transitional month, setting the stage for the gradual warming that follows, while beautifully juxtaposing the starkness of winter against the promise of spring.
January in Aso, Japan, sees a relatively modest precipitation amount of 58 mm (2.3 in) over just 6 days of rainfall, laying the groundwork for a transitional month ahead. This early winter moisture transitions into a wetter February, which nearly doubles January's totals with 98 mm (3.9 in) over 10 days. As spring approaches, precipitation escalates dramatically, peaking in July with 452 mm (17.8 in) across 21 days, making it the wettest month of the year. Notably, after January's subdued start, there's a gradual increase in both total rainfall and rainy days, suggesting a shift toward a more humid climate as the seasons progress, with May and June experiencing a significant surge before the heavy rains of summer.
In January, Aso, Japan experiences a considerable humidity level of 75%, setting the stage for a winter that is both crisp and slightly moist. This initial figure reflects the region's transition into the cooler months, with humidity decreasing slightly to 71% in February and March, signaling a brief respite before the spring thaw. However, as the seasons change, humidity begins to rise again, reaching 78% in April and climbing steadily through the late spring and summer months, peaking at a sultry 92% in July. This pattern highlights Aso's distinct seasonal shift, where the abundant rainfall and lush landscapes during the warmer months create a striking contrast to the cooler, drier winter air, with humidity levels gradually tapering off to 81% in November and 79% in December. Overall, January marks the beginning of a dynamic year-round cycle of humidity that profoundly shapes Aso's climate and natural beauty.
In January, Aso, Japan, experiences a moderate UV Index of 4, indicating a relatively low risk of harm from unprotected sun exposure, with a burn time of approximately 30 minutes. As the months progress into February, the UV Index rises to 6, reflecting a high exposure category and a reduced burn time of 25 minutes. This upward trend continues dramatically through March to April, where the UV Index skyrockets to 8 and then an extreme 11, respectively, with burn times dropping to just 10 minutes in the latter. The extreme levels persist through to August, peaking at 12 for both July and August, emphasizing the need for sun protection during these hotter months. As autumn arrives, the UV Index begins to taper off, decreasing to 8 in October and returning to 6 in November, before settling back down to 4 in December. This clear trend highlights the significant fluctuation in UV exposure in Aso throughout the year, making it essential to stay informed and protected. For more details, visit Aso UV Index.
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In Aso, Japan, the allure of January sunshine offers a gentle wake-up call after the winter months, with 178 hours of daylight gracing the landscape. As the year unfolds, there is a noticeable upward trend in sunshine hours; February sees an increase to 232 hours, further setting the stage for spring's arrival. By March, the sun bathes Aso in 259 hours of light, and April continues this upward momentum with 277 hours. The peak of May shines brightly with 283 hours, leading into the warm embrace of summer where August boasts a delightful 294 hours of radiant sunshine. The months that follow, while still embracing ample daylight, gradually begin to taper, embodying the transition towards the cooler seasons. This rhythmic pattern of light not only highlights Aso's weather variations but also charms residents and visitors, urging them to revel in the vibrant cycles of nature.
In Aso, Japan, January brings a 43% chance of sunny weather, mirroring the likelihood observed in February. As the months progress towards spring, the chances start to dip, with March experiencing a decrease to 37%. However, as the year approaches autumn, the trend shifts; by October, the probability of sunshine climbs significantly to an impressive 58%, suggesting that the region enjoys a sunnier disposition later in the year. November and December also offer more favorable conditions, with 50% and 54% chances of sunshine, respectively. Overall, while January offers moderate sunny prospects, the highest likelihood arrives as Aso moves into fall, highlighting a seasonal performance shift in weather patterns.
In Aso, Japan, January ushers in a chilly new year with 10 hours of daylight, a figure that holds steady into February, providing a brief yet consistent window for outdoor exploration. As spring approaches in March, daylight begins its slow ascent, offering 11 hours, which further extends to 12 hours in April and peaks at 13 hours in May. The transition into summer is marked by a generous 14 hours of daylight in both June and July, creating perfect conditions for adventures in Aso's lush surroundings. However, as summer wanes in August, daylight begins its gradual decline back to 13 hours, and continues to recede through the fall months, reaching 10 hours once again by November and December. This rhythm of daylight duration not only reflects the changing seasons but also beckons residents and visitors alike to embrace the diverse experiences that each month unveils.
In January, the winds in Aso, Japan whisper at a gentle pace, averaging 2.3 m/s (5 mph). This tranquility sets the stage for the month, where the slightly brisk air carries the promise of winter's chill. As the year progresses into February, a subtle increase in wind speed to 2.9 m/s (6 mph) hints at a shift, perhaps stirring excitement as the landscapes prepare for the budding of spring. However, by March, the winds ease back to 2.2 m/s (5 mph), creating a rhythm of calmness. The rest of the spring months reflect a similar pattern, oscillating around the 5 mph mark, particularly in April and May. As we transition into the summer months, the winds dip to a notably softer 1.7 m/s (4 mph) in June, presenting a serene atmosphere as nature flourishes. July and August witness a return to the milder speeds of early winter, resting at around 2.1 to 2.3 m/s (5 mph), while the late months of September through November bring back a hint of briskness, yielding winds that vary from 1.8 to 2.1 m/s (4-5 mph). This cyclical pattern demonstrates the tranquil yet dynamic character of Aso's winds, shaping the unique charm of its winter season.
Weather in Aso varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Aso, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, temperatures range from a minimum of -7°C (20°F) to a maximum of 16°C (62°F), with an average of 4°C (39°F). The month experiences 58 mm (2.3 in) of precipitation spread over 6 days, and humidity levels hover around 75%. In contrast, February sees slightly colder minimum temperatures at -8°C (18°F) but boasts a marginally higher average of 5°C (41°F) and a maximum reaching 19°C (67°F). However, it is wetter than January, with 98 mm (3.9 in) of precipitation over 10 days and humidity that drops slightly to 71%. For more detailed insights, you can check Aso weather in February.
In January, the weather in Aso is characterized by colder temperatures, with a minimum of -7°C (20°F) and an average of 4°C (39°F), reaching a maximum of 16°C (62°F). Precipitation is relatively low, totaling 58 mm (2.3 in) over just 6 days, while humidity remains high at 75%. In contrast, March brings a noticeable warming trend, featuring a minimum temperature of -3°C (27°F) and an average of 9°C (49°F), peaking at 23°C (73°F). However, this month also sees increased rain, with precipitation rising to 137 mm (5.4 in) over 12 days and humidity slightly easing to 71%. For more detailed weather insights for this time of year, check out Aso weather in March.
January and April present contrasting weather patterns. In January, temperatures range from a chilly -7°C (20°F) at night to a mild 16°C (62°F) during the day, with an average of 4°C (39°F). The month sees approximately 58 mm of precipitation over about 6 days, coupled with a humidity level of 75%. In contrast, April brings a significant increase in warmth, with temperatures varying from -1°C (31°F) at night to a balmy 27°C (81°F) in the afternoon, averaging around 14°C (57°F). Rainfall rises to 135 mm over approximately 10 days, and humidity slightly increases to 78%. For more details on April weather, check Aso weather in April.
January and May present starkly contrasting weather conditions. In January, temperatures are much cooler, with a minimum of -7°C (20°F) and an average of 4°C (39°F), while the maximum reaches 16°C (62°F). The month sees about 58 mm (2.3 in) of precipitation across six days, accompanied by a relatively high humidity level of 75%. In contrast, May boasts milder temperatures, ranging from a minimum of 2°C (36°F) to an average of 18°C (65°F), and peaking at a warm 30°C (85°F). However, May is considerably wetter, with precipitation totaling 209 mm (8.2 in) over 13 days and a slightly higher humidity of 84%. For a detailed look at weather specifics, refer to Aso weather in May.
In January, temperatures in Aso are quite chilly, ranging from a minimum of -7°C (20°F) to an average of 4°C (39°F), with a maximum of 16°C (62°F). The month sees around 58 mm (2.3 in) of precipitation over just 6 days, combined with a humidity level of 75%. In stark contrast, June experiences a significant warming trend, with temperatures ranging from a minimum of 11°C (52°F) to an average of 21°C (71°F), peaking at a steamy 31°C (88°F). However, June is also characterized by much heavier rainfall, accumulating 276 mm (10.9 in) over 16 days and higher humidity levels of 86%. For more detailed insights on the weather during June, you can visit Aso weather in June.
January and July showcase stark contrasts in weather. In January, temperatures range from a chilly -7°C (20°F) at night to a mild 16°C (62°F) during the day, with an average of 4°C (39°F). The month sees around 58 mm (2.3 in) of precipitation over six days and experiences a humidity level of 75%. In contrast, July brings much warmer temperatures, with a minimum of 15°C (59°F) and a maximum reaching 34°C (94°F), averaging 25°C (77°F). This summer month is significantly wetter, with 452 mm (17.8 in) of rainfall spread over 21 days, and humidity rises to 92%. For a closer look at the climate, take a look at Aso weather in July.
January and August present a stark contrast in weather conditions. In January, temperatures range from a chilly -7°C (20°F) to a mild 16°C (62°F), with an average of around 4°C (39°F). The month experiences approximately 58 mm (2.3 in) of precipitation over 6 days, combined with a relative humidity of 75%. In sharp contrast, August boasts much warmer temperatures, with a minimum of 16°C (62°F) and a maximum reaching up to 35°C (96°F), averaging about 26°C (79°F). Rainfall increases significantly during this month, totaling 253 mm (10.0 in) across 16 days, accompanied by a higher humidity level of 91%. The differences between these two months highlight the seasonal variations experienced in the region, making January cool and relatively dry while August is warm and humid. For more detailed information, you can check Aso weather in August.
January and September present a stark contrast in weather conditions. In January, temperatures range from a chilly -7°C (20°F) at their lowest to a mild 16°C (62°F) at their peak, with an average temperature of around 4°C (39°F). The month experiences around 58 mm (2.3 in) of precipitation over six days, accompanied by a humidity level of 75%.
In contrast, September sees significantly warmer temperatures, with minimums around 9°C (49°F) and highs soaring up to 33°C (92°F), leading to an average of 23°C (73°F). However, the month is also wetter, with precipitation totaling 192 mm (7.6 in) across 15 days and a higher humidity of 84%. This comparison highlights the seasonal shifts from a cold, dry January to a warm, humid September. For more insights, you can refer to Aso weather in September.
January and October showcase strikingly different weather conditions. In January, temperatures can dip as low as -7°C (20°F), with average highs reaching only 16°C (62°F). The month experiences around 58 mm (2.3 in) of precipitation over 6 days, with a humidity level of 75%, contributing to a chilly and often damp atmosphere. In contrast, October enjoys milder temperatures, with minimums around 4°C (40°F) and maximums soaring to 30°C (87°F), creating a significantly warmer environment. Precipitation also increases in October, totaling 122 mm (4.8 in) over 9 days, accompanied by a slight rise in humidity to 83%. For more details on the weather in October, visit Aso weather in October.
January and November present a striking contrast in weather patterns. In January, temperatures range from a chilly -7°C (20°F) to a mild 16°C (62°F), with an average of 4°C (39°F), while November offers a broader temperature spectrum, with lows of -4°C (25°F) and highs reaching up to 24°C (76°F), averaging at 11°C (51°F). Both months receive a similar amount of precipitation, around 58 to 60 mm (2.3 in), but November tends to have slightly more rainy days, with 8 compared to January's 6. Additionally, humidity levels are higher in November at 81%, compared to January's 75%, contributing to a more moist, while still cool, atmosphere. For more detailed insights into conditions during this time, check out Aso weather in November.
January typically experiences colder temperatures than December, with minimums averaging around -7°C (20°F) compared to December’s minimum of -5°C (24°F). Although both months have similar average temperatures, January's maximum reaches only 16°C (62°F) while December can peak at 21°C (70°F). Precipitation is slightly lower in January, with 58 mm (2.3 in) over 6 days, compared to December’s 70 mm (2.8 in) over 7 days. Additionally, humidity levels are marginally lower in January at 75%, compared to December’s 79%. For more details about December weather, you can visit Aso weather in December.
In January, Aso experiences a distinct shift in weather compared to the milder months of spring and summer. With temperatures dropping to an average of 4°C (39°F), the chilly air contrasts sharply with the warmer seasons. Frosty mornings, with minimums reaching as low as -7°C (20°F), create a picturesque winter landscape, though this is tempered by an average of 58 mm (2.3 in) of precipitation across about six days. The high humidity level of 75% further enhances the crisp, brisk atmosphere, making January an ideal time for those seeking a unique winter experience. For more details on Aso's climate throughout the year, visit Aso Climate.