Last updated: August 21, 2025
December in Yokosuka, Japan offers a unique blend of cool temperatures and notable precipitation. With daytime highs reaching a mild 21°C (70°F) and nighttime lows dipping to 3°C (37°F), the month sees an average temperature of 11°C (51°F), ideal for outdoor explorations. Visitors should be prepared for a drizzle, as the city records around 71 mm (2.8 in) of rain over approximately 8 days, contributing to a humidity level of 78%. This atmospheric mix creates a crisp, refreshing environment perfect for enjoying the seasonal charm of Yokosuka.
As December ushers in winter in Yokosuka, Japan, temperatures take a noticeable dip. The month sees a minimum of 3°C (37°F), making it the coldest of the year, while the average hovers around 11°C (51°F). Despite the chill, daytime highs can still reach a pleasant 21°C (70°F), offering a charming contrast to the cooler nights. This gradual decline from the milder autumn months signifies a transition towards colder temperatures, setting the stage for the winter season ahead. With fewer fluctuations than the more temperate months, December presents a refreshingly crisp climate that many find invigorating, making it perfect for exploring the city's seasonal festivities.
In December, Yokosuka experiences a moderate shift in precipitation, with an average of 71 mm (2.8 in) falling over approximately 8 days. This marks a slight increase from November's total, where 108 mm was recorded over 11 days. The pattern in December indicates a transition toward drier conditions, especially when compared to the heavier rainfall seen in the summer months, such as July's 211 mm. As the year draws to a close, the relatively subdued rainfall is accompanied by cooler temperatures, creating a crisp atmosphere that leads into the winter season while providing a refreshing contrast to the wet autumn months.
As December rolls in, Yokosuka, Japan, experiences a slight decline in humidity to 78%, which marks a gradual transition from the oppressive summer months to the cooler winter season. The year kicks off with relatively high humidity levels, peaking at a staggering 93% in July. Following this, a steady decrease occurs, with the humidity remaining consistently high until October. Although November sees a slight dip to 80%, December maintains a sense of moisture but offers a refreshing respite compared to the sweltering summer. This pattern illustrates a clear trend of diminishing humidity as the year progresses towards its conclusion, creating a more comfortable atmosphere for both residents and visitors alike.
In Yokosuka, Japan, December marks a transition towards milder UV conditions, with the UV Index at 4, categorizing it as moderate. This indicates that while sun protection is advisable, the risk of harm from unprotected sun exposure is relatively low, with a burn time of approximately 30 minutes. Following a trend evident throughout the preceding months, where the UV Index peaked at 11 during the summer, December’s values reflect a welcome retreat from the extreme sunshine of earlier months. As the year closes, residents and visitors can enjoy outdoor activities with a reduced risk of UV exposure, making it a perfect time to embrace the outdoors while staying sun-smart. For more detailed information on UV trends, check out the Yokosuka UV Index.
UV Risk Categories
In Yokosuka, Japan, December brings a satisfying 226 hours of sunshine, echoing the warmth of the preceding months. As the year closes, sunshine levels reflect a slight dip from the vibrant 286 hours in May and a peak 297 hours in August, yet it remains consistent with November's sunny disposition. This trend highlights a gradual transition into winter, where days shorten but still offer generous sunlit hours compared to the chill of January, which starts the year with a mere 187 hours. Overall, Yokosuka's December sunshine encapsulates a blend of lingering warmth, inviting both locals and visitors to bask in the last glimmers of the year's radiant days.
In Yokosuka, Japan, the likelihood of sunny weather in December is relatively high, standing at 66%. This marks an encouraging trend as the year winds down, especially when compared to earlier months such as January and March, which see lower chances of sunshine at 52% and 42%, respectively. December’s sunny prospects are particularly notable against the backdrop of November's 62%, suggesting that local residents and visitors alike can expect a cheerful close to the year. This upward trend in sunny days as December approaches gives hope for a pleasant festive season in this coastal city.
In Yokosuka, Japan, the daylight duration follows a clearly defined seasonal rhythm, gently transitioning from the longer days of summer to the shorter days of winter. Starting with nine hours in December, daylight begins to diminish, reaching its lowest point as the year concludes. This trend continues into the winter months, with November and January also providing around ten hours of sunlight. As spring approaches, the days gradually lengthen, peaking at fourteen hours in May, June, and July. The autumn months lead to a soft decline once again, settling at around eleven hours by October and tapering back down to ten hours in November before plunging into December's shorter days. This rhythmic pattern of varying daylight highlights the seasonal shifts that characterize life in this coastal city, enhancing both the beauty and the experience of each passing month.
As December sweeps into Yokosuka, Japan, the average wind speed picks up slightly to 5.8 m/s (13 mph), reflecting a subtle yet noticeable shift from the calmer summer months. Following a seasonal lull in June and July, where the winds dipped to around 3.5 m/s (8 mph), the fall months witness a gradual increase, culminating in a brisk December breeze. This monthly uptick indicates a transition toward the heart of winter, with winds becoming more robust than earlier in the year. Notably, December's wind speeds are not only stronger than the preceding months but also represent a peak after a trend of stability experienced from late autumn. This consistent pattern throughout the year showcases Yokosuka’s dynamic climate, inviting residents and visitors alike to embrace the refreshing chill of the sea breeze as the year draws to a close.
Weather in Yokosuka varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Yokosuka, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January present a noticeable shift in weather patterns. In December, temperatures range from a minimum of 3°C (37°F) to a maximum of 21°C (70°F), with an average of 11°C (51°F). The month sees about 71 mm (2.8 in) of precipitation over 8 days, coupled with a humidity level of 78%. In contrast, January experiences colder temperatures, with a minimum of 0°C (33°F) and a maximum of 18°C (64°F), averaging 8°C (47°F). Precipitation in January is slightly less at 61 mm (2.4 in) but occurs over just 5 days, while humidity is marginally lower at 76%. For more detailed information, you can check out Yokosuka weather in January.
In December, temperatures in Yokosuka typically range from a minimum of 3°C (37°F) to a maximum of 21°C (70°F), with an average of 11°C (51°F). This month sees around 71 mm (2.8 in) of precipitation over 8 days, accompanied by relatively high humidity at 78%. Conversely, February experiences slightly cooler conditions, with temperatures dipping to a minimum of 1°C (35°F) and peaking at 18°C (65°F), averaging 8°C (48°F). Precipitation is lower at 52 mm (2.0 in) over the same number of wet days, alongside a modest drop in humidity to 74%. For more detailed insights, you can check Yokosuka weather in February.
December and March present distinct weather patterns despite their relatively close average temperatures. In December, the temperature ranges from a minimum of 3°C (37°F) to a maximum of 21°C (70°F) with an average of 11°C (51°F). This month sees about 71 mm (2.8 in) of precipitation over 8 days, accompanied by a higher humidity level of 78%.
In contrast, March experiences slightly milder temperatures, with a minimum of 4°C (39°F) and a maximum of 19°C (66°F), maintaining an average of 11°C (53°F). However, March is wetter, with 155 mm (6.1 in) of precipitation spread over 12 days, and a lower humidity of 70%. For more details on the weather in March, you can check Yokosuka weather in March.
December and April showcase distinct weather characteristics, despite sharing a maximum temperature of 21°C (70°F). In December, temperatures range from a minimum of 3°C (37°F) to an average of 11°C (51°F), with relatively high humidity at 78%. The month also experiences about 71 mm (2.8 in) of precipitation over 8 days. In contrast, April sees a milder climate with minimum temperatures of 6°C (43°F) and an average of 14°C (58°F). This month is notably wetter, with 123 mm (4.8 in) of rain spread over 10 days, but humidity is slightly lower at 74%. For more specific details, you can check Yokosuka weather in April.
December and May present contrasting weather conditions. In December, temperatures range from a minimum of 3°C (37°F) to a maximum of 21°C (70°F), with an average of 11°C (51°F). The month sees about 71 mm (2.8 in) of precipitation over approximately 8 rainy days, and the humidity hovers around 78%. In contrast, May features milder temperatures, with a minimum of 12°C (54°F), an average of 19°C (66°F), and a maximum of 24°C (75°F). It experiences higher precipitation, totaling 136 mm (5.3 in) over 11 days, and slightly increased humidity at 81%. For more detailed information, you can check Yokosuka weather in May.
December and June present quite contrasting weather patterns. In December, temperatures range from a chilly 3°C (37°F) at night to a mild 21°C (70°F) during the day, with average temperatures hovering around 11°C (51°F). The month sees about 71 mm (2.8 in) of precipitation over eight days, accompanied by a relative humidity of 78%. In stark contrast, June features warmer temperatures, with nighttime lows of 16°C (62°F) and daytime highs reaching up to 26°C (79°F). Average temperatures are around 22°C (71°F), and the month experiences significantly higher precipitation of 175 mm (6.9 in) spread over 12 days, alongside a humidity level of 88%. For more details on June weather, you can check Yokosuka weather in June.
December and July present stark contrasts in weather. December enjoys milder temperatures, with minimums around 3°C (37°F) and averages reaching up to 11°C (51°F), while July boasts significantly warmer conditions, with minimums of 19°C (67°F) and average highs around 25°C (77°F). Precipitation is more frequent in July, with 211 mm (8.3 in) spread over 17 days compared to December's 71 mm (2.8 in) over just 8 days. Additionally, humidity is notably higher in July at 93%, compared to a more comfortable 78% in December. For more detailed information, you can check Yokosuka weather in July.
When comparing the weather in December and August, it's clear that these two months present strikingly different climates. December experiences cooler temperatures, with a minimum of 3°C (37°F) and an average of 11°C (51°F), while August boasts much warmer conditions, with a minimum of 21°C (70°F) and an average of 27°C (80°F). Precipitation levels are also notable; December sees 71 mm (2.8 in) over 8 days, whereas August has a significantly higher total of 117 mm (4.6 in) over 11 days, contributing to its lush summer greenery. Additionally, humidity levels are quite high in both months, peaking at 90% in August compared to 78% in December. For more specific details on the summer climate, you can visit Yokosuka weather in August.
In comparing the weather between December and September, one can observe significant differences in temperature and precipitation. December typically sees mild temperatures, with a minimum of 3°C (37°F) and a maximum of 21°C (70°F), resulting in an average of 11°C (51°F). This month experiences relatively low rainfall, with 71 mm (2.8 in) of precipitation spread over about 8 days and humidity levels around 78%. In contrast, September is much warmer, featuring minimum temperatures of 18°C (65°F) and maximums reaching 30°C (85°F), with an average temperature of 24°C (76°F). However, it is also wetter, with 189 mm (7.4 in) of precipitation over approximately 15 days and higher humidity at 86%. For more details on September weather, you can check out Yokosuka weather in September.
When comparing the weather in December and October, notable differences emerge. December tends to be cooler, with an average temperature of 11°C (51°F), while October's temperatures are warmer, averaging 20°C (68°F). The minimum temperature in December drops to 3°C (37°F), significantly lower than October's 13°C (56°F). Precipitation is another area of contrast; October experiences more rainfall, totaling 271 mm (10.7 in) over 16 days, compared to December's 71 mm (2.8 in) over just 8 days. Additionally, humidity levels are slightly higher in October at 83%, while December sits at 78%. For a more detailed look at October's weather patterns, check out Yokosuka weather in October.
In comparing the weather patterns of December and November, December tends to be slightly cooler with a minimum temperature of 3°C (37°F) compared to November's minimum of 6°C (43°F). The average temperature in December is also lower at 11°C (51°F), while November boasts a milder average of 16°C (60°F). Precipitation levels drop in December, totaling 71 mm (2.8 in) over 8 days, in contrast to November's higher 108 mm (4.3 in) spread over 11 days. Humidity remains relatively consistent, at 78% in December versus 80% in November. For a more detailed look at the weather during this time, you can visit Yokosuka weather in November.
As December rolls into Yokosuka, it brings a noticeable shift in weather that sets it apart from earlier months. The temperatures dip, with cool days averaging around 11°C, creating a crisp atmosphere perfect for winter activities. While the humidity remains high, the increased chance of rain—about eight days throughout the month—adds a refreshing touch to the air. With a blend of sunny and overcast days, December evokes a sense of transition, making it an intriguing time to experience the coastal charm of Yokosuka. For a deeper look into how December compares and to explore the overall climate, visit Yokosuka Climate.