Last updated: August 21, 2025
In January, the weather in Yamaguchi, Japan presents a chill tempered by occasional mild days. With maximum temperatures reaching up to 16°C (60°F) and an average temperature of 5°C (42°F), locals experience a stark contrast to the colder nights, where temperatures can drop to a brisk -4°C (25°F). This month sees about 58 mm (2.3 in) of precipitation over 9 days, contributing to a humid atmosphere with an average humidity level of 76%. Whether you're enjoying the crisp air or preparing for rainy periods, January in Yamaguchi offers a unique blend of winter elements that capture the essence of this beautiful region.
In Yamaguchi, Japan, January presents a crisp winter tableau, with temperatures ranging from a chilly -4°C (25°F) at night to a mild daytime high of 16°C (60°F). This month marks the coldest point of the year, with an average temperature of 5°C (42°F). As winter progresses towards February, we see a slight uptick in warmth, yet the nights remain frosty, only slightly warmer at -3°C (27°F). The seasonal transition is noticeable as we move into March, where the minimum temperatures begin to rise and hint at the approaching spring. January’s temperatures contrast sharply with the subsequent months, illustrating the shift from winter's embrace toward the blossoming warmth of spring, ultimately leading to more temperate conditions in April and beyond. This fascinating fluctuation in temperature defines Yamaguchi's climate, perfectly capturing the essence of seasonal change.
In January, Yamaguchi experiences a relatively mild beginning to the year, with precipitation totaling 58 mm (2.3 inches) over 9 days. This sets a foundation for gradually increasing rainfall throughout the months, as February sees a rise to 78 mm (3.1 inches) with the same number of precipitation days. The trend intensifies in spring, with March delivering a significant 130 mm (5.1 inches), leading into April and May, which both experience elevated levels of rainfall, peaking in June at an impressive 198 mm (7.8 inches) as summer approaches. This increasing pattern culminates in the sweltering summer months of July and August, where Yamaguchi faces the heaviest rainfall, emphasizing the region's transition from the drier winter to the lush, vibrant summer season.
In January, Yamaguchi, Japan experiences a humidity level of 76%, setting the stage for a winter that is notably damp. This trend of elevated moisture persists into February, though it begins to decrease slightly to 72%. As spring approaches, the humidity continues to decline, reaching 69% in March before rising again in April to 75%. This fluctuation hints at the transition towards the more humid months ahead, with May ballooning to 84%. The summer ushers in a peak with humidity soaring to an impressive 95% in July, followed closely by 93% in August. The trend shows a gradual decrease heading into autumn, with September at 84% and October at 79%, before stabilizing around 76% in November and returning to 75% in December. Overall, Yamaguchi's humidity displays a dynamic ebb and flow, reflecting the region's changeable seasonal climate.
In January, Yamaguchi experiences a moderate UV Index of 4, with a burn time of about 30 minutes. As the month progresses into February, the UV Index slightly increases to 5, maintaining the same level of exposure. However, by March, the landscape shifts dramatically, with a jump to a very high UV Index of 8 that reduces burn time to just 15 minutes. The intensity peaks in the spring and summer months, particularly in April and May where it reaches an extreme index of 11, indicating a significant increase in sun exposure risk with only 10 minutes of burn time. This extreme trend continues through June and July, culminating in a peak of 12 in August. As the year transitions into the fall, the UV Index gradually declines, with September maintaining a very high level of 10, before dropping to the high range in October and November. By December, the UV Index decreases to 3, indicating a return to a moderate level. This seasonal fluctuation highlights the need for sun protection during the higher UV months. For more detailed information, check out the Yamaguchi UV Index.
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January in Yamaguchi, Japan, sees 174 hours of sunshine, marking a modest start to the year. As winter transitions into spring, there’s a noticeable increase in sunlight, with February rising to 229 hours and March further brightening with 264 hours. The trend continues into the vibrant months of April and May, where sunshine peaks at 280 hours and an impressive 300 hours, respectively. However, as summer settles in, June slightly dips to 291 hours, while July maintains a steady 280 hours. The sun shines its brightest in August with a remarkable 303 hours, before gradually tapering off in the fall months of September and October, which offer 257 and 256 hours of sunshine, respectively. November and December close the year with 234 and 211 hours, revealing a gentle decline as Yamaguchi prepares for another winter. Overall, Yamaguchi experiences a dynamic spectrum of sunlight throughout the year, showcasing nature's ever-changing patterns.
In Yamaguchi, Japan, January brings a 36% chance of sunny weather, a modest figure that is nearly on par with the slightly sunnier February at 45%. As the year progresses into spring, the likelihood of sunshine improves, peaking in April at 47%, before dipping again in the summer months when cloud cover tends to dominate. Interestingly, the autumn months provide a delightful surprise, with October showing an impressive 58% chance of clear skies, signaling a delightful transition as the year shifts. Overall, while January may be somewhat overcast, the gradual increase in sunny days toward spring and the autumn's bright finale suggest a dynamic weather pattern throughout the year in Yamaguchi.
In January, Yamaguchi, Japan enjoys about 10 hours of daylight, a duration that remains consistent into February. As spring approaches, the days gradually lengthen, offering 11 hours of light in March and stretching to 13 hours by April and May. The peak of summer in June and July sees daylight reaching 14 hours, providing ample time for outdoor activities. However, as we transition into late summer and autumn, daylight begins to wane, with August seeing a slight decrease to 13 hours. By September, sunlight shrinks further to 12 hours, and the trend continues downward, with October and November presenting 11 and 10 hours, respectively. December concludes the year with the shortest daylight span of just 9 hours, marking a cyclical rhythm of light and dark throughout the year in Yamaguchi.
In January, the winds in Yamaguchi, Japan carry a brisk chill, averaging 3.2 m/s (7 mph), setting the tone for the winter season. As the year progresses into February, the breeze picks up slightly, reaching 3.5 m/s (8 mph), before transitioning back to a gentler pace in March and April at 3.1 m/s (7 mph) and 3.2 m/s (7 mph), respectively. However, as spring unfolds into summer, the winds begin to soften, dropping to their annual low in July at 2.2 m/s (5 mph). This trend of diminished wind speed continues into the sweltering summer months, before gradually picking up pace once more in the cooler fall months of November and December, where they reach 2.9 m/s (6 mph) and 3.3 m/s (7 mph). Overall, the pattern reveals a seasonal ebb and flow, with breezy beginnings and calming summer winds, perfectly encapsulating Yamaguchi's climatic rhythm.
Weather in Yamaguchi varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Yamaguchi, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit relatively similar weather patterns, yet February tends to be slightly milder overall. In January, temperatures range from a minimum of -4°C (25°F) to a maximum of 16°C (60°F), with an average temperature of 5°C (42°F). The month also sees 58 mm (2.3 in) of precipitation over 9 days and maintains a humidity level of 76%.
In contrast, February experiences a slightly warmer range, with temperatures dipping to a minimum of -3°C (27°F) and peaking at 22°C (71°F), resulting in an average temperature of 6°C (43°F). Precipitation increases to 78 mm (3.1 in) over the same number of rainy days, while humidity drops slightly to 72%. For more details on February weather, check out the Yamaguchi weather in February.
January and March present quite different weather patterns. In January, temperatures range from a chilling minimum of -4°C (25°F) to a mild maximum of 16°C (60°F), with an average temperature of around 5°C (42°F). The month experiences about 58 mm (2.3 in) of precipitation over 9 days, accompanied by relatively high humidity levels of 76%. In contrast, March sees a notable rise in temperatures, with a minimum of -1°C (31°F) and a maximum reaching up to 22°C (72°F). The average temperature climbs to 10°C (51°F). However, it is also wetter, with precipitation totaling 130 mm (5.1 in) spread over 12 days and humidity dropping to 69%. For more specific information, you can check Yamaguchi weather in March.
In comparing the weather between January and April, we see notable differences in temperature and precipitation. January experiences a chillier climate, with average temperatures ranging from a minimum of -4°C (25°F) to a maximum of 16°C (60°F). On the other hand, April brings a significant warming trend, with average temperatures ranging from a minimum of 1°C (34°F) to a maximum of 26°C (79°F).
Precipitation also varies between the two months; January has about 58 mm (2.3 inches) of rain over 9 days, while April sees an increase to 122 mm (4.8 inches) over 10 days. Interestingly, humidity remains fairly consistent, hovering around 76% in January and slightly lower at 75% in April. For a detailed look at April's weather, you can check Yamaguchi weather in April.
In January, the weather tends to be quite cold, with temperatures ranging from a minimum of -4°C (25°F) to an average of 5°C (42°F), and occasionally reaching a maximum of 16°C (60°F). The month experiences about 58 mm (2.3 in) of precipitation over approximately 9 days, accompanied by a humidity level of 76%. In contrast, May brings a significant warming trend, featuring temperatures that range from a minimum of 5°C (42°F) to an average of 19°C (67°F), and peaking at a maximum of 30°C (87°F). This month sees increased rainfall, totaling 136 mm (5.4 in) over about 11 days, and a higher humidity level of 84%. For a closer look at May weather specifically, you can visit Yamaguchi weather in May.
In January, Yamaguchi experiences cooler temperatures, with averages around 5°C (42°F) and a maximum of 16°C (60°F). The month sees around 58 mm (2.3 in) of precipitation over 9 days, paired with a humidity level of 76%. In contrast, June brings significantly warmer weather, where temperatures range from a minimum of 12°C (54°F) to a maximum of 31°C (89°F), resulting in an average of 22°C (73°F). Rainfall increases to 198 mm (7.8 in) across 13 days, accompanied by a higher humidity of 88%. For more detailed insights into the June weather, you can visit Yamaguchi weather in June.
January and July present starkly contrasting weather conditions. In January, the temperatures range from a chilly -4°C (25°F) to a mild 16°C (60°F), with an average of 5°C (42°F). This month experiences about 58 mm (2.3 in) of precipitation over 9 days, coupled with a relative humidity of 76%. In contrast, July boasts much warmer temperatures, with a minimum of 17°C (63°F) and maximums reaching up to 37°C (99°F), averaging 26°C (80°F). The summer month is notably wetter, receiving around 340 mm (13.4 in) of rain spread across 20 days, accompanied by high humidity levels of 95%. For more details, visit Yamaguchi weather in July.
January and August present strikingly different weather patterns. In January, temperatures range from a chilly minimum of -4°C (25°F) to a mild maximum of 16°C (60°F), with an average temperature of 5°C (42°F). The month sees about 58 mm (2.3 in) of precipitation over nine days, along with a humidity level of 76%. Conversely, August experiences much warmer conditions, with temperatures ranging from a minimum of 19°C (66°F) to a scorching maximum of 38°C (100°F) and an average of 28°C (83°F). The summer month is significantly wetter, receiving 265 mm (10.4 in) of precipitation across 15 days, coupled with a high humidity of 93%. For a closer look at August weather specifics, check out Yamaguchi weather in August.
January and September present stark contrasts in weather patterns. In January, temperatures range from a chilly minimum of -4°C (25°F) to a maximum of 16°C (60°F), averaging around 5°C (42°F). The month sees around 58 mm (2.3 in) of precipitation over approximately 9 days, with humidity levels at 76%. In contrast, September brings much warmer conditions, with temperatures ranging from a minimum of 13°C (56°F) to a sweltering maximum of 35°C (95°F), averaging 24°C (75°F). Precipitation also increases significantly to 240 mm (9.4 in) over about 14 days, and humidity rises to 84%. For a deeper look into the specifics of September weather, you can check out Yamaguchi weather in September.
January and October present quite contrasting weather patterns. In January, temperatures range from a chilly -4°C (25°F) to a pleasant 16°C (60°F), with an average of around 5°C (42°F). The month sees about 58 mm (2.3 in) of precipitation over 9 days and maintains a humidity level of 76%. In stark contrast, October enjoys milder weather, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 30°C (87°F), averaging around 19°C (66°F). This month experiences significantly higher precipitation at 120 mm (4.7 in) over 10 days, coupled with a humidity level of 79%. For more detailed insights, check out Yamaguchi weather in October.
In January, temperatures can dip as low as -4°C (25°F) and reach an average high of 16°C (60°F), while November offers a milder range with minimum temperatures around 0°C (32°F) and maximums soaring to 25°C (78°F). The precipitation in January is slightly higher at 58 mm (2.3 in) over 9 days, compared to November's 41 mm (1.6 in) spread over just 5 days. Both months share a humidity level of 76%, but November’s generally warmer temperatures make it feel more comfortable. For more details on November's weather, you can visit Yamaguchi weather in November.
In comparing the weather of January and December, we notice that December tends to be slightly milder with average temperatures around 7°C (46°F), while January sees lower averages of about 5°C (42°F). December's maximum temperature can reach up to 21°C (70°F), contrasting with January's peak of 16°C (60°F). Both months experience a good amount of precipitation, with December receiving 67 mm (2.6 in) over 8 days, slightly more than January's 58 mm (2.3 in) over 9 days. Humidity levels are quite similar, averaging at 75% in December and 76% in January. For more detailed insights into December weather, check out Yamaguchi weather in December.
As January rolls in, Yamaguchi experiences a noticeable chill that sets it apart from the milder months that precede and follow. With daytime temperatures rarely reaching above 16°C and dipping to a brisk -4°C at night, residents and visitors alike are greeted by a winter landscape marked by crisp air and higher humidity levels, averaging around 76%. While January does bring about an increase in precipitation, with around 58 mm expected over the month, the number of rainy days—9 in total—adds a certain charm to the season. For those looking to understand the nuances of Yamaguchi's January weather, more detailed insights can be found at Yamaguchi Climate.