Last updated: August 21, 2025
Experience the warm and humid summer of Yokosuka, Japan in August, where maximum temperatures soar to a sultry 32°C (89°F), while the average settles at a pleasant 27°C (80°F). As the mercury gently drops to a minimum of 21°C (70°F) during the cooler evenings, the region invites you to enjoy its balmy nights. However, be prepared for an average of 117 mm (4.6 in) of rain spread across 11 days, making a light raincoat or umbrella a wise companion for your adventures. With humidity levels reaching an impressive 90%, the weather is perfect for savoring the seasonal vibrancy of this coastal city!
In August, Yokosuka, Japan, experiences its warmest temperatures of the year, with minimums averaging 21°C (70°F), averages soaring to 27°C (80°F), and peak temperatures reaching a sizzling 32°C (89°F). This hefty rise in warmth follows a steady increase from the earlier summer months, showcasing a clear trend of rising temperatures as the season progresses. The combination of high humidity and warmth draws both locals and tourists to the region's beautiful beaches and vibrant outdoor activities, making August a peak month for enjoying the sun. As the days begin to shorten, a hint of relief from the oppressive heat is anticipated in September, but for now, Yokosuka basks in the height of summer comfort.
In August, Yokosuka experiences a notable shift in its precipitation patterns, with a total of 117 mm (4.6 in) of rain falling over 11 days. This marks a decrease from the record-breaking rain of July, which saw 211 mm (8.3 in) over 17 days, reflecting a gradual tapering off of the intense summer rains. The relatively moderate rainfall in August serves as a transition period, as the city prepares for an uptick in precipitation in the following months, particularly in October, when amounts soar to 271 mm (10.7 in). This pattern underscores August as a crucial month, balancing the lingering summer humidity with the onset of autumn showers.
In Yokosuka, Japan, the humidity levels tell a story of seasonal swings, with August standing out at a whopping 90%. This month falls just slightly below the peak moisture of July, which boasts an intense 93% humidity. Following a gradual rise starting in May, humidity levels surge during the summer, reflecting the region's muggy climate. After August, the humidity begins to taper off, settling at 86% in September and continuing a slow decline into the fall months. With average humidity ranging from a comfortable 70% in March to the steamy highs of summer, Yokosuka’s weather encapsulates the essence of a humid subtropical climate, inviting both challenges and charm throughout the year.
In Yokosuka, Japan, August marks a peak in UV exposure, with the UV Index reaching a striking 11, categorized as extreme. This level of intensity means that sunburn can occur within just 10 minutes of unprotected skin exposure. Interestingly, August maintains the high UV Index trend established earlier in the summer months, remaining consistent with the equally extreme readings of June and July. Following this pattern, it's essential for residents and visitors alike to take precautionary measures during this time to protect their skin from harmful UV rays. As summer transitions into fall, the UV Index gradually decreases, hinting at a safer sun exposure period starting in September. To learn more about the UV Index throughout the year, visit Yokosuka UV Index.
UV Risk Categories
In Yokosuka, Japan, August stands out with a remarkable 297 hours of sunshine, marking it as the sunniest month of the year. This bright highlight follows a steady increase in sunlight from the early months, where hours gradually climbed from 187 in January to 269 in April. As summer progresses, the trend persists, peaking in August before gently tapering off in September to 239 hours. With May also showcasing ample brightness at 286 hours, the warm months present a distinct contrast to the cooler winter, where sunlight dips below 210 hours. Thus, Yokosuka's August not only promises long sun-filled days but also exemplifies the region's vibrant transition from spring's emerging light to the height of summer radiance.
In Yokosuka, Japan, the likelihood of sunny weather in August stands at 39%, showing a noticeable dip compared to the sunnier winter months and the mild fall. This is part of a broader trend where the summer months, specifically July and August, see reduced chances of sunshine—likely due to increased humidity and the rainy season. Although the sun breaks through occasionally, August's somewhat bleak forecast aligns with a general seasonal decline, which emphasizes the struggle between warmth and the frequent overcast sky typical of late summer. As the year progresses towards autumn, a gradual increase in sunny days is anticipated, particularly in the months of October and November.
In Yokosuka, Japan, the rhythm of daylight shifts gracefully throughout the year, peaking in the vibrant summer months. August offers a generous 13 hours of daylight, just a notch below the extended 14 hours seen in July. This slight dip signals the transition towards autumn while still allowing plenty of time for outdoor activities under the warm sun. As the month progresses, the daylight begins to wane, setting the stage for September’s shorter days, which include 12 hours of sunlight. The overall trend reveals a clear seasonal pattern: daylight increases steadily from winter’s 10 hours in January to summer’s peak before gradually tapering off as the year draws to a close. This dynamic interplay of light mirrors the changing landscape and life in this coastal city, inviting residents and visitors alike to embrace the vibrant summer days while anticipating the cozy, shorter days of fall.
In Yokosuka, Japan, the August wind offers a refreshing respite, maintaining an average speed of 5.3 m/s (12 mph), consistent with the mild breezes of both September and October. Following the summer months, where winds are notably calmer—peaking in July at just 3.5 m/s (8 mph)—August represents a slight resurgence in wind activity. This trend highlights a transition towards the more stable and invigorating winds of fall. Throughout the year, wind speeds typically hover between 5.3 m/s and 6.1 m/s, revealing a pristine balance of gentle gusts and steady breezes that define Yokosuka's coastal charm.
Weather in Yokosuka varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Yokosuka, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, the weather is typically warm and humid, with average temperatures around 27°C (80°F) and highs reaching up to 32°C (89°F). The month experiences significant rainfall, with 117 mm (4.6 in) of precipitation over approximately 11 days, resulting in a humidity level of 90%. In contrast, January brings much cooler temperatures, with an average of 8°C (47°F) and a maximum of 18°C (64°F). January's precipitation is lower at 61 mm (2.4 in) over about 5 days, and the humidity also decreases to 76%. For more detailed information on winter weather, you can refer to Yokosuka weather in January.
August and February present strikingly contrasting weather patterns. In August, temperatures soar with a minimum of 21°C (70°F), averaging 27°C (80°F), and peaking at 32°C (89°F), accompanied by high humidity levels of 90%. This month also sees significant rainfall, recording 117 mm (4.6 in) over approximately 11 days. In contrast, February offers a cooler climate with a minimum temperature of 1°C (35°F), an average of 8°C (48°F), and a maximum of 18°C (65°F). Precipitation is notably less in February, totaling 52 mm (2.0 in) over just 8 days, while the humidity is more comfortable at 74%. These differences highlight the diverse climate experienced throughout the year. For more detailed information, check out Yokosuka weather in February.
August and March present contrasting weather patterns in terms of temperature and precipitation. In August, the temperatures are notably warmer, with a minimum of 21°C (70°F) and an average of 27°C (80°F), peaking at a maximum of 32°C (89°F). This month also experiences high humidity at 90%, which can make the heat feel even more intense. In contrast, March has much cooler temperatures, ranging from a minimum of 4°C (39°F) to a maximum of 19°C (66°F), with an average temperature of 11°C (53°F). Although March receives slightly more precipitation at 155 mm (6.1 in) over 12 days compared to August's 117 mm (4.6 in) over 11 days, the humidity is lower at 70%, creating a fresher atmosphere. For a more detailed overview, you can check Yokosuka weather in March.
When comparing the weather in August and April, notable differences emerge in temperature and humidity levels. August features much warmer temperatures, with a minimum of 21°C (70°F) and an average of 27°C (80°F), while April sees cooler temperatures, ranging from a minimum of 6°C (43°F) to an average of 14°C (58°F). Additionally, August experiences higher humidity at 90% compared to April's 74%, making it feel quite muggy during the summer month. Precipitation is fairly similar, with both months receiving substantial rainfall—117 mm (4.6 in) in August and 123 mm (4.8 in) in April, although the number of rainy days is slightly higher in August at 11 days versus April’s 10. For more specific April weather details, you can check Yokosuka weather in April.
In comparing the weather of August and May, we see a marked difference in temperatures and humidity levels. August boasts warmer temperatures with a minimum of 21°C (70°F) and an average of 27°C (80°F), reaching a maximum of 32°C (89°F). In contrast, May experiences milder conditions, with temperatures ranging from a minimum of 12°C (54°F) to an average of 19°C (66°F), and peaking at 24°C (75°F). While both months have similar precipitation, with August receiving 117 mm (4.6 in) and May slightly higher at 136 mm (5.3 in), the humidity in August is notably higher at 90%, compared to May's 81%. For more detailed information, you can visit Yokosuka weather in May.
When comparing the weather in August and June, it's clear that August tends to be warmer and slightly more humid. In August, temperatures range from a minimum of 21°C (70°F) to a maximum of 32°C (89°F), with an average of 27°C (80°F) and humidity levels around 90%. In contrast, June presents milder conditions, with temperatures ranging from 16°C (62°F) to 26°C (79°F), averaging 22°C (71°F) and featuring slightly lower humidity at 88%. While August sees less rainfall with 117 mm (4.6 in) over 11 days, June experiences more precipitation, totaling 175 mm (6.9 in) across 12 days. For a closer look at June's weather patterns, you can explore Yokosuka weather in June.
In comparing the weather of August to July, we see notable differences in temperature and precipitation. August is generally warmer, with an average temperature of 27°C (80°F) compared to July's average of 25°C (77°F). The maximum temperatures in August reach 32°C (89°F), slightly higher than July's 29°C (85°F). However, July experiences significantly more precipitation, with 211 mm (8.3 in) falling over 17 days, compared to August's 117 mm (4.6 in) over 11 days. Additionally, humidity levels are slightly higher in July at 93% versus 90% in August. For a more detailed look at July's weather patterns, you can check Yokosuka weather in July.
August typically presents warmer weather with an average temperature of 27°C (80°F), peaking at a maximum of 32°C (89°F). While the humidity is high at 90%, the month sees a total precipitation of 117 mm (4.6 in) over approximately 11 days. In contrast, September brings slightly cooler temperatures, with an average of 24°C (76°F) and a maximum of 30°C (85°F). However, it experiences higher precipitation levels, totaling 189 mm (7.4 in) across 15 days, and humidity remains moderately high at 86%. For more detailed insights, you can check out Yokosuka weather in September.
August and October display contrasting weather patterns, reflecting the transition between summer and autumn. In August, temperatures are warm, with a minimum of 21°C (70°F) and an average of 27°C (80°F), peaking at 32°C (89°F). The month also sees high humidity at 90% and considerable rainfall, totaling 117 mm (4.6 in) over 11 rainy days. In comparison, October experiences cooler temperatures, starting at a minimum of 13°C (56°F) and averaging 20°C (68°F), with a maximum of 27°C (81°F). Rainfall increases significantly to 271 mm (10.7 in) over 16 days, while humidity dips slightly to 83%. For more details, check out the Yokosuka weather in October.
August and November present starkly contrasting weather conditions. In August, temperatures are warm, ranging from a minimum of 21°C (70°F) to a maximum of 32°C (89°F), with an average of 27°C (80°F). High humidity at 90% makes the heat feel even more intense, and the month typically sees 117 mm (4.6 in) of precipitation over 11 days. In contrast, November ushers in cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 22°C (72°F), averaging just 16°C (60°F). Although the precipitation is slightly lower at 108 mm (4.3 in) and the same number of rainy days, humidity decreases to 80%, contributing to a much crisper feel. For more details, you can check Yokosuka weather in November.
August and December present strikingly different weather patterns. In August, temperatures soar with a minimum of 21°C (70°F), an average of 27°C (80°F), and peaks reaching up to 32°C (89°F), accompanied by high humidity at 90%. The month also sees considerable precipitation, with 117 mm (4.6 in) falling over 11 days. In contrast, December brings a much cooler climate, where 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). Precipitation decreases to 71 mm (2.8 in) over just 8 days, and humidity drops to 78%. For more details on the weather you can expect in December, visit Yokosuka weather in December.
August in Yokosuka brings a contrast to the cooler months, characterized by warm temperatures and high humidity that can feel quite intense. With averages hovering around a balmy 27°C (80°F) and maximums reaching up to 32°C (89°F), the summer heat is undeniably prominent. However, this month is also marked by notable precipitation, as it typically receives around 117 mm (4.6 inches) over 11 days, introducing occasional rain that provides a refreshing relief from the warmth. This combination of heat and humidity makes August one of the most distinctive months in Yokosuka's yearly climate profile. To explore more about the weather patterns year-round, visit Yokosuka Climate.