Last updated: August 21, 2025
In Yokosuka, Japan, January welcomes visitors with a blend of brisk temperatures and refreshing maritime air. The maximum temperature reaches a mild 18°C (64°F), while the average hovers around a cool 8°C (47°F), descending to a chilly minimum of 0°C (33°F) during the night. With precipitation totaling 61 mm (2.4 in) over 5 rainy days, the month can be wet, adding a vibrant sheen to the winter landscape. The humidity, averaging 76%, enhances the crispness of the air, making it a perfect time for brisk walks along the scenic coastline or exploration of local attractions.
In Yokosuka, Japan, January ushers in the chill of winter, showcasing a temperature range from a brisk 0°C (33°F) at night to a milder 18°C (64°F) during the day, with an average of 8°C (47°F). As the month progresses, residents and visitors alike may notice a subtle warmth compared to December, hinting at the gradual seasonal shift. January's cool temperatures set the tone for January's clear, crisp days, making it an ideal time for enjoying outdoor activities or exploring the city's scenic coastline. The temperatures remain stable but start to nudge upwards, leading into February and March, signaling the impending arrival of spring and a welcome respite from the winter cold.
In January, Yokosuka experiences a relatively mild start to the year with precipitation amounting to 61 mm (2.4 in), occurring over just five days. This sets a trend for the winter months where February sees a slight decrease in rainfall, dropping to 52 mm (2.0 in), but the weather takes a notable turn in March as precipitation surges to 155 mm (6.1 in). The increasing rainfall pattern continues through the spring and into summer, peaking in July with a significant 211 mm (8.3 in) over 17 days. As the seasons transition into autumn, rainfall remains substantial, particularly in October, which records the year's highest at 271 mm (10.7 in). This pattern highlights a clear trajectory of increasing precipitation leading into the wetter months, shaping Yokosuka's climate and seasonal activities.
In Yokosuka, Japan, January experiences an average humidity of 76%, setting the tone for a winter that gradually transitions into more humid conditions. As the months progress, the humidity dips slightly in February to 74%, but soon climbs back up, peaking in the sultry summer months of July and August with levels reaching 93% and 90%, respectively. The spring months witness a gentle rise, with humidity stabilizing around the 70-81% range before the summer heat sets in. By October, the humidity begins to taper off, with November and December showcasing relative comfort at 80% and 78%, respectively. Overall, Yokosuka's humidity patterns illustrate a clear seasonal cycle, where winters are moderately humid and summers become notably more oppressive, creating a distinct atmospheric rhythm throughout the year.
In Yokosuka, Japan, January welcomes a moderate UV Index of 4, with a burn time of around 30 minutes—perfect for enjoying outdoor activities while remaining mindful of sun exposure. As the months progress into February, the UV Index rises slightly to 5, holding steady at a moderate level. By March, however, the UV Index escalates dramatically to 8, indicating very high exposure with just 15 minutes before skin damage may occur. This trend continues, peaking in May and June at an extreme 11, where one must take extra precautions, with burn time plummeting to only 10 minutes. As summer fades, September sees a decrease to a very high index of 10, followed by a gradual decline into the lower ranges of November and December. This fluctuation highlights the importance of staying vigilant about sun protection throughout the year. For more detailed information, visit the Yokosuka UV Index.
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January in Yokosuka, Japan, welcomes 187 hours of sunshine, setting the stage for a gradual increase in brightness as the year unfolds. With February seeing a modest uptick to 224 hours, the days begin to lengthen. This positive trend accelerates into spring, where March brings 255 hours and April further delights with 269 hours. May shines the brightest so far, offering 286 hours, making it a perfect time to enjoy the outdoors. Summer holds its own, with July and August basking in 249 and a remarkable 297 hours of sunshine, respectively. As the year transitions to autumn, the sunshine gently recedes, yet November and December maintain a respectable 226 hours each, ensuring that the warmth of the season lingers even as the year draws to a close. The overall pattern highlights a clear seasonal rhythm, with a peak in brightness during the summer months, showcasing Yokosuka’s sunny allure all year round.
In Yokosuka, Japan, January offers a 52% chance of sunny weather, making it one of the more favorable months for sunshine during the winter. This percentage is notably higher than March's 42%, indicating a relatively brighter start to the year. As January transitions into February, the likelihood of sunny days increases significantly to 64%, suggesting a promising rise in sunshine as the seasons change. However, this positive trend reverses as spring approaches, with April dipping to 50% and the following months, including June and July, falling to around 25-36%. Overall, while January is a solid month for enjoying sunny weather, it sets the stage for the subsequent increase in sunshine in February, before the clouds loom larger in the summer months.
January in Yokosuka, Japan, greets residents with 10 hours of daylight, a duration that remains consistent into February. As spring approaches in March, the days begin to lengthen, ushering in 11 hours of daylight. The increase continues through April, reaching a vibrant 13 hours, and peaks in May with 14 hours, when long, sun-kissed days become the norm. Interestingly, June, July, and August maintain this generous 14 hours, allowing for plenty of outdoor adventures. However, as summer fades, the daylight gradually recedes; September offers 12 hours, followed by a decrease to 11 hours in October. By December, the city is enveloped in early twilight, providing only 9 hours of daylight. This annual cycle highlights a rhythmic ebb and flow, harmonizing with the changing seasons and inviting the community to savor each day’s unique light.
In Yokosuka, Japan, January greets residents and visitors with an average wind speed of 5.4 m/s (12 mph), setting the tone for a winter that is relatively breezy. As the months progress, February sees a noticeable uptick in windspeed to 6.1 m/s (14 mph), hinting at the winter's lingering presence. However, this gusty trend doesn't last long; by March, the winds ease back to 5.6 m/s (12 mph). This trend of moderate winds continues through the spring with only slight fluctuations, maintaining an average around 5.5 m/s. As summer approaches, the winds calm considerably, dropping to 3.5 m/s (8 mph) in July, before gradually picking up again in late summer to 5.3 m/s in August and September. The autumn months see a return to steadier winds, reinforcing a cycle of gentle breezes that characterizes Yokosuka's unique maritime climate. This oscillation between calmer summer days and brisker winter winds paints a vivid picture of life in this coastal city.
Weather in Yokosuka varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Yokosuka, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit similar overall weather patterns, but some slight differences are noticeable. In January, temperatures range from a minimum of 0°C (33°F) to a maximum of 18°C (64°F), with an average temperature of 8°C (47°F). This month sees about 61 mm (2.4 in) of precipitation over 5 days, coupled with a humidity level of 76%. Conversely, February records a minimum temperature of 1°C (35°F), maintaining the average temperature at 8°C (48°F) and peaking at a maximum of 18°C (65°F). Precipitation in February totals 52 mm (2.0 in) over 8 days, contributing to a slightly lower humidity of 74%. Overall, February offers a marginally milder feel with slightly less precipitation, as noted in more detail in this link: Yokosuka weather in February.
In January, the weather features a minimum temperature of 0°C (33°F) and an average of 8°C (47°F), peaking at a maximum of 18°C (64°F). The month experiences a total precipitation of 61 mm (2.4 in) over 5 days and maintains a humidity level of 76%. In contrast, March shows a slight increase in temperature, with a minimum of 4°C (39°F) and an average of 11°C (53°F), reaching a maximum of 19°C (66°F). However, March is notably wetter, with precipitation totaling 155 mm (6.1 in) over 12 days and a slightly lower humidity level of 70%. For more specific details on March weather, you can check Yokosuka weather in March.
In January, temperatures in Yokosuka range from a chilly minimum of 0°C (33°F) to a maximum of 18°C (64°F), with an average temperature of 8°C (47°F). The month experiences about 61 mm (2.4 in) of precipitation over approximately 5 days, accompanied by a humidity level of 76%. In contrast, April brings a noticeable warming trend, with temperatures starting at a minimum of 6°C (43°F) and peaking at 21°C (70°F), resulting in an average of 14°C (58°F). However, April is wetter, boasting 123 mm (4.8 in) of precipitation over about 10 days, while humidity remains relatively stable at 74%. For more detailed information about the weather in April, you can visit Yokosuka weather in April.
In January, the weather is generally cool, with average temperatures hovering around 8°C (47°F) and a maximum of 18°C (64°F). This month experiences around 61 mm (2.4 in) of precipitation over about 5 days, accompanied by a humidity level of 76%. In contrast, May brings a significant warming trend, with average temperatures rising to 19°C (66°F) and highs reaching up to 24°C (75°F). However, May also sees increased precipitation at 136 mm (5.3 in) over 11 days, along with a slightly higher humidity of 81%. For more details on the weather in May, visit Yokosuka weather in May.
In January, the weather in Yokosuka is characterized by cool temperatures, with an average of 8°C (47°F) and maximums reaching up to 18°C (64°F). Precipitation is relatively low, with around 61 mm (2.4 in) falling over five days, and the humidity stands at 76%. In stark contrast, June brings much warmer conditions, with average temperatures climbing to 22°C (71°F) and highs hitting 26°C (79°F). This month also sees a significant increase in rainfall, totaling 175 mm (6.9 in) across 12 days, accompanied by elevated humidity levels of 88%. For more details on the specific weather patterns during this month, you can check Yokosuka weather in June.
In January, the weather in Yokosuka is quite chilly, with temperatures ranging from a minimum of 0°C (33°F) to a pleasant maximum of 18°C (64°F) and an average of 8°C (47°F). With about 61 mm (2.4 in) of precipitation over five days and a humidity level of 76%, January feels brisk and damp. In contrast, July brings warm summer temperatures, with a minimum of 19°C (67°F), an average of 25°C (77°F), and a maximum of 29°C (85°F). However, July also experiences significantly higher precipitation, totaling 211 mm (8.3 in) over 17 days, along with increased humidity at 93%. For more details on summer weather, you can check Yokosuka weather in July.
January and August present stark contrasts in weather. In January, temperatures range from a chilly 0°C (33°F) to a mild 18°C (64°F), with an average of 8°C (47°F). The month experiences 61 mm (2.4 in) of precipitation over 5 days, and humidity sits at a comfortable 76%. In contrast, August ushers in warmth, with temperatures ranging from 21°C (70°F) at night to a scorching 32°C (89°F) during the day, averaging 27°C (80°F). Precipitation increases significantly to 117 mm (4.6 in) over 11 days, accompanied by higher humidity levels at 90%. For more details, you can check the Yokosuka weather in August.
In January, the weather is quite cool with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 18°C (64°F), averaging around 8°C (47°F). There is also relatively low precipitation, measuring 61 mm (2.4 in) over about 5 days, resulting in a humidity level of 76%. In contrast, September brings a significant shift as temperatures rise considerably, with a minimum of 18°C (65°F) and a maximum of 30°C (85°F), averaging at 24°C (76°F). However, this month sees increased rainfall, totaling 189 mm (7.4 in) spread across 15 days and a rise in humidity to 86%. For more details, check out Yokosuka weather in September.
In January, the weather is notably cooler, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 18°C (64°F) and an average of 8°C (47°F). It experiences less precipitation, totaling 61 mm (2.4 in) over just five days, accompanied by a humidity level of 76%. In contrast, October brings much warmer conditions, with minimum temperatures of 13°C (56°F) and highs reaching 27°C (81°F) for an average of 20°C (68°F). The month is significantly wetter, receiving 271 mm (10.7 in) of rain over 16 days, and the humidity increases slightly to 83%. For more specific details, you can check out Yokosuka weather in October.
In comparing the weather between January and November, we find significant differences in both temperature and precipitation patterns. January experiences cooler temperatures, with a minimum of 0°C (33°F) and an average of 8°C (47°F), while November sees milder temperatures, ranging from a minimum of 6°C (43°F) to an average of 16°C (60°F). Furthermore, November is wetter, with 108 mm (4.3 in) of rainfall over 11 days compared to January's 61 mm (2.4 in) over just 5 days. The humidity also remains relatively high in both months, with January at 76% and November slightly higher at 80%. For more details, check out Yokosuka weather in November.
In comparing the weather between January and December, January tends to be cooler, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 18°C (64°F), resulting in an average of 8°C (47°F). In contrast, December is slightly warmer, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 21°C (70°F) and an average of 11°C (51°F). Precipitation also varies, with January receiving 61 mm (2.4 in) over 5 days, while December sees a bit more at 71 mm (2.8 in) across 8 days. Additionally, humidity levels are comparable, with January at 76% and December slightly higher at 78%. For more detailed information about December weather, check out Yokosuka weather in December.
As January unfolds in Yokosuka, the weather presents a distinct contrast to the warmer months, characterized by cooler temperatures and increased humidity. With the average temperature hovering around 8°C (47°F), chilly mornings give way to milder afternoons reaching up to 18°C (64°F), making it a perfect time for layered clothing. January also sees a modest amount of precipitation, with around 61 mm (2.4 in) spread across about five days, ensuring a fresh atmosphere amidst the crisp air. This blend of cooler temperatures and damp conditions makes January a unique time to experience Yokosuka's winter charm, offering a serene backdrop for exploration. To delve deeper into the region's climate variations, visit Yokosuka Climate.