Last updated: August 21, 2025
December in Yamaguchi, Japan showcases a mild climate with temperatures ranging from a maximum of 21°C (70°F) to a chilly minimum of -1°C (31°F), resulting in an average temperature of 7°C (46°F). During this month, the region experiences 67 mm (2.6 in) of rainfall spread across 8 days, contributing to a humidity level of 75% that adds a crispness to the air. This combination of mild temperatures and moderate precipitation makes December an intriguing time to explore Yamaguchi's beauty, whether it's enjoying the seasonal landscapes or experiencing local festivities.
As December settles in, Yamaguchi, Japan experiences a notable transition in temperatures, marking the arrival of winter. The month typically begins with minimum temperatures hovering around -1°C (31°F), maintaining a crisp chill in the air that hints at the holiday season. The average temperature gently rises to about 7°C (46°F), providing a cool reprieve from the harsher cold of January. Daily highs can reach up to 21°C (70°F), showcasing a comfortable warmth for outdoor activities, particularly in the earlier weeks of the month. Overall, December in Yamaguchi beautifully illustrates the shift to winter, characterized by its cool, invigorating climate that invites residents and visitors alike to embrace the season's charm.
In December, Yamaguchi experiences a moderate variation in precipitation, recording 67 mm (2.6 in) over 8 days of rainfall. This month's figures reflect a notable decrease from the wetter months of summer and early autumn, such as July, which can see upwards of 340 mm. As the year draws to a close, December's precipitation is slightly higher than November's low of 41 mm but still significantly lighter compared to the spring months when rainfall peaks around 130 mm in March. This trend suggests a shift towards drier conditions that typically characterize the winter season, setting the stage for the colder months ahead while still maintaining a pleasant balance in Yamaguchi's climate.
In Yamaguchi, Japan, December brings a moderate humidity level of 75%, marking a slight decrease from the previous month. This seasonal shift reflects the overall trend of humidity that peaks during the sultry summer months—July and August—with numbers soaring to an impressive 95% and 93% respectively. As the year progresses, humidity gradually declines from the heavy, moisture-laden air of June, which averages 88%, to a more comfortable winter range. Unlike the humidity spikes seen in spring and summer, December's figures settle into a rhythm that suggests a crisp, invigorating winter atmosphere, inviting residents and visitors to embrace the chill while enjoying the natural beauty of the season.
In Yamaguchi, Japan, December marks a noteworthy shift in the UV Index, dropping to 3, which falls into the moderate exposure category. This seasonal change provides a welcome contrast to the extreme levels observed from April through August, where the UV Index surged as high as 12, requiring just a 10-minute exposure to risk skin burn. As the year winds down, residents and visitors can expect longer safe exposure times of 30 minutes in December, similar to the early winter months of January and February. The trend reflects a gradual decline in UV intensity, making it essential for individuals to adapt their sun safety practices as the days grow shorter and cooler. For more detailed insights about UV levels, visit Yamaguchi UV Index.
UV Risk Categories
In Yamaguchi, Japan, December heralds the approach of winter, bringing a moderate 211 hours of sunshine. While this is a decrease compared to the vibrant sunshine of previous months, such as August's peak of 303 hours, it still offers a pleasant reprieve from the colder temperatures. The trend throughout the year showcases a gradual increase in daylight hours, starting from a chilly 174 in January and reaching a warm 300 in May, before tapering off again. Despite December’s decline, the lingering daylight continues to add a sparkle to the holiday season, reflecting an overall pattern of shifting light that characterizes the subtle beauty of Yamaguchi’s climate.
In Yamaguchi, Japan, the likelihood of sunny weather in December stands at 44%, reflecting a trend of relatively stable sun exposure as the year comes to a close. Compared to the preceding months, December sees a slight increase from November's 47%, suggesting a promising end to the year. However, it's noteworthy that earlier months like October boast a higher sunshine chance at 58%, while the summer months progressively decline to the lows of July and August, where only 22% and 25% of days receive sunlight, respectively. This data illustrates a captivating shift, with December straddling the line between a bright autumn finale and the cloudier winter months ahead, providing just enough sun to make the chilly atmosphere feel a bit brighter.
In Yamaguchi, Japan, the daylight duration experiences a noticeable ebb and flow throughout the year, culminating in December with just 9 hours of sunshine. This gradual decline begins in late autumn, where the daylight hovers around 10 hours in both November and December. As the year progresses, daylight stretches from 10 hours in January and February to a peak of 14 hours in June and July, just before the days begin to shorten again. The transition from summer’s ample light to winter’s early dusk creates a rhythm of seasons that reflects the changing climate in this picturesque region. The consistent pattern highlights the contrast between the vibrant energy of summer and the tranquil, quiet beauty of the winter months.
As December unfurls in Yamaguchi, Japan, the winds start to pick up slightly, averaging 3.3 m/s (7 mph). This marks a refreshing change from the more languid breezes of summer, where the average wind speed dipped to 2.2 m/s (5 mph) in July. Interestingly, the late year months show a subtle rebound; November experienced 2.9 m/s, paving the way for December's brisk currents. Overall, from the gentle whispers of summer to the more pronounced gusts of the winter, the wind patterns throughout the year exhibit a dynamic ebb and flow, highlighting winter's definitive arrival with a spirited chill that complements the season's festive atmosphere.
Weather in Yamaguchi varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Yamaguchi, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather exhibits a range of temperatures with a minimum of -1°C (31°F) and a maximum of 21°C (70°F), resulting in an average temperature of 7°C (46°F). The month experiences a total precipitation of 67 mm (2.6 in) over approximately 8 days, coupled with a humidity level of 75%.
In contrast, January sees slightly cooler conditions, with temperatures dipping to a minimum of -4°C (25°F) and peaking at 16°C (60°F), yielding an average of 5°C (42°F). Precipitation decreases marginally to 58 mm (2.3 in) and is spread across about 9 days, while humidity rises slightly to 76%.
For more detailed information, check Yamaguchi weather in January.
December and February present notable differences in weather patterns, though both months are relatively mild. In December, temperatures range from a minimum of -1°C (31°F) to a maximum of 21°C (70°F), with an average of 7°C (46°F) and about 67 mm (2.6 in) of precipitation spread over 8 days. The humidity is fairly high at 75%. In comparison, February is slightly cooler on average, with temperatures ranging from -3°C (27°F) to 22°C (71°F) and an average of 6°C (43°F). Precipitation increases to 78 mm (3.1 in) over 9 days, while humidity remains relatively consistent at 72%. For more detailed insights about February weather, you can visit Yamaguchi weather in February.
In comparing December and March weather, both months experience similar minimum temperatures, with December recording a low of -1°C (31°F) and March matching it. However, March sees a slight increase in average and maximum temperatures, averaging 10°C (51°F) and peaking at 22°C (72°F), compared to December's average of 7°C (46°F) and max of 21°C (70°F). Additionally, March tends to be wetter, with 130 mm (5.1 in) of precipitation over 12 days, while December receives 67 mm (2.6 in) across 8 days. Humidity levels are also slightly lower in March at 69%, compared to December's 75%. For more detailed information, you can visit Yamaguchi weather in March.
December and April present contrasting weather patterns. In December, temperatures range from a chilly minimum of -1°C (31°F) to a comfortable maximum of 21°C (70°F), with an average of 7°C (46°F). The month experiences around 67 mm (2.6 in) of precipitation over approximately 8 days, alongside a consistent humidity level of 75%. In contrast, April sees warmer temperatures, with a minimum of 1°C (34°F) and a maximum of 26°C (79°F), resulting in a higher average of 14°C (58°F). However, it also brings increased rainfall, totaling 122 mm (4.8 in) over about 10 days, while maintaining the same humidity level of 75%. For more detailed insights into the weather conditions during this month, you can check Yamaguchi weather in April.
December and May present contrasting weather experiences. In December, temperatures range from a chilly -1°C (31°F) at night to a mild average of 7°C (46°F) during the day, with maximums reaching 21°C (70°F). The month sees about 67 mm (2.6 in) of precipitation across 8 days, accompanied by a humidity level of 75%. In stark contrast, May offers warmer conditions with temperatures starting at a minimum of 5°C (42°F), averaging 19°C (67°F), and peaking at a comfortable 30°C (87°F). However, it also brings higher rainfall, totaling 136 mm (5.4 in) over 11 days, with humidity climbing to 84%. For more details on May weather, check Yamaguchi weather in May.
December and June exhibit stark contrasts in weather. In December, temperatures range from a chilly minimum of -1°C (31°F) to a mild maximum of 21°C (70°F), with an average around 7°C (46°F). The month typically sees about 67 mm (2.6 in) of precipitation over 8 days and a humidity level of 75%. In contrast, June experiences significantly warmer weather, with temperatures starting at a minimum of 12°C (54°F) and peaking at 31°C (89°F), averaging 22°C (73°F). Rainfall is more abundant in June, totaling 198 mm (7.8 in) over 13 days, accompanied by higher humidity at 88%. For more details on June weather, you can check Yamaguchi weather in June.
December and July present starkly contrasting weather conditions. In December, temperatures range from a chilly -1°C (31°F) at night to a milder 21°C (70°F) during the day, with an average of 7°C (46°F). This month experiences moderate precipitation of 67 mm (2.6 in) spread over about 8 days, coupled with a humidity level of 75%. In contrast, July brings much warmer temperatures, with nighttime lows of 17°C (63°F) and daytime highs soaring up to 37°C (99°F), averaging 26°C (80°F). The month is also significantly wetter, receiving 340 mm (13.4 in) of rainfall over approximately 20 days and exhibiting high humidity of 95%. For more details about the unique weather patterns in this month, refer to Yamaguchi weather in July.
December and August present contrasting weather conditions. In December, temperatures range from a chilly -1°C (31°F) to a mild 21°C (70°F), with an average of 7°C (46°F). This month sees about 67 mm (2.6 in) of precipitation over 8 days, accompanied by a humidity level of 75%. In stark contrast, August is characterized by much warmer temperatures, with a minimum of 19°C (66°F), an average of 28°C (83°F), and a sweltering maximum of 38°C (100°F). It also experiences significantly higher rainfall, totaling 265 mm (10.4 in) over 15 days, and a higher humidity of 93%. For more details, visit Yamaguchi weather in August.
In comparing the weather between December and September, it's clear that the two months offer contrasting conditions. December typically experiences cooler temperatures, ranging from a minimum of -1°C (31°F) to a maximum of 21°C (70°F), with an average of 7°C (46°F). The humidity is moderate at 75%, and precipitation is relatively low, with around 67 mm (2.6 in) falling over about 8 days.
In contrast, September is much warmer, with temperatures ranging from a minimum of 13°C (56°F) to a scorching maximum of 35°C (95°F), and an average of 24°C (75°F). This month is also considerably wetter, receiving 240 mm (9.4 in) of rainfall over approximately 14 days, accompanied by higher humidity levels at 84%. For more detailed insights into Yamaguchi's weather in September, you can check Yamaguchi weather in September.
December and October present quite distinct weather patterns. In December, temperatures range from a chilly -1°C (31°F) at night to a milder 21°C (70°F) during the day, with an average temperature of 7°C (46°F). The month sees around 67 mm (2.6 in) of precipitation over approximately 8 days, and the humidity level sits at 75%. In contrast, October offers much warmer temperatures, with lows around 8°C (46°F) and highs peaking at 30°C (87°F), averaging 19°C (66°F). This month receives significantly more rainfall, totaling 120 mm (4.7 in) across about 10 days, along with higher humidity at 79%. For a deeper look into October's weather, visit Yamaguchi weather in October.
Comparing the weather in December to that of November reveals some notable differences. In December, temperatures generally range from a minimum of -1°C (31°F) to a maximum of 21°C (70°F), with an average of 7°C (46°F). This is a drop from November, where the temperatures ranged from 0°C (32°F) to a maximum of 25°C (78°F), averaging at 13°C (55°F). Additionally, December sees more precipitation, totaling 67 mm (2.6 in) over 8 days, compared to November's 41 mm (1.6 in) over 5 days. Despite similar humidity levels, December tends to feel cooler, making it a more wintry month compared to the relatively milder November. For more specific insights into November weather, you can visit Yamaguchi weather in November.
December in Yamaguchi marks a notable transition as the city embraces the chill of winter. Temperatures glide between a mild peak and brisk lows, creating a refreshing yet crisp atmosphere that sets it apart from the warmer months. With an average humidity of 75%, the air feels damp but invigorating, and the 67 mm of precipitation over eight days hints at the onset of more frequent winter rains. This blend of cooler conditions and sporadic showers offers a unique charm to the landscape, making it a perfect time for cozy gatherings and enjoying indoor activities. For more insights into the weather patterns throughout the year, be sure to explore Yamaguchi Climate.