Last updated: August 21, 2025
In August, Shimonoseki, Japan experiences warm temperatures, with a maximum reaching 32°C (89°F) and an average of 27°C (81°F). The month sees a minimum temperature of 21°C (69°F), providing a comfortable yet humid environment with 93% humidity. Rainfall is notable, with approximately 251 mm (9.9 inches) spread over 13 days, making this month both vibrant and occasionally soggy. Whether you’re wandering the coastal streets or enjoying local cuisine, be prepared for a mix of warmth and moisture in this bustling port city.
In August, Shimonoseki, Japan, experiences warm and inviting temperatures, making it one of the hottest months of the year. The average temperature hovers around 27°C (81°F), with daily highs reaching up to 32°C (89°F), creating a vibrant atmosphere perfect for summer festivities. Nights remain relatively comfortable, with lows around 21°C (69°F), allowing for pleasant evening strolls and outdoor dining. This month's warmth is a smooth continuation from the preceding July, which sees similar high temperatures but slightly cooler nightly lows. As summer transitions towards fall, Shimonoseki's August heat provides a delightful backdrop for visitors and locals alike to enjoy the famed coastal scenery and thriving cultural activities.
August in Shimonoseki, Japan, marks a notable peak in the summer's rainy season, with precipitation averaging 251 mm (9.9 in) across approximately 13 rainy days. This significant rainfall is only slightly lower than July's impressive total of 295 mm (11.6 in), which could hint at an ongoing pattern of heavy downpours as the region transitions from the sweltering heat of summer into the cooling embrace of autumn. Following August, September also sees considerable rainfall at 226 mm (8.9 in), though with fewer wet days, suggesting that while the summer storms may start to lessen, the carryover effect of moisture remains substantial. This trend emphasizes Shimonoseki's reputation for a humid climate, particularly during the peak summer months when precipitation takes center stage.
In Shimonoseki, Japan, August brings high humidity levels, averaging at a notable 93%. This month typically follows a pattern of increasing moisture, as humidity consistently rises from 69% in March to a peak of 95% in July. After the sweltering heights of summer, August's humidity remains relatively high, only slightly dipping in September to 84%. The transition into fall sees a gradual decline, with humidity figures stabilizing around the mid 70s% by late autumn. Overall, Shimonoseki experiences a distinct summer trend characterized by elevated humidity, with August firmly positioned near the pinnacle of this seasonal trend.
In August, Shimonoseki, Japan, experiences an extreme UV Index of 12, maintaining the same high intensity that began in July. This peak level of exposure signifies a significant risk for sunburn, with a burn time of just 10 minutes under direct sunlight. The trend from earlier months showcases a gradual rise in UV intensity, starting from a moderate level of 4 in January to the extreme levels seen in the summer months. As the summer progresses, residents and visitors alike should take precautionary measures to protect their skin. For detailed insights and real-time data on UV levels, you can refer to the Shimonoseki UV Index.
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In August, Shimonoseki basks in a luxurious 305 hours of sunshine, reaching the pinnacle of the seasonal glow. This month stands out as the sunniest of the year, following a steady ascent from January's modest 178 hours. As the months progress into spring and early summer, sunlight steadily increases, peaking in August before transitioning into a mellow autumn. The drop in sunshine in September to 256 hours signals a gentle retreat from summer’s vibrance, yet the lingering warmth of August leaves behind a golden memory of idyllic days. This sunny crescendo not only emphasizes the joy of summer but also highlights the pleasing rhythm of Shimonoseki's changing seasons.
In Shimonoseki, Japan, the likelihood of sunny weather takes a noticeable dip during the summer months, with August presenting only a 27% chance of sunshine. This trend reflects a gradual decline from the more vibrant sun chances seen in spring, peaking at 46% in April. As the season progresses into summer, it becomes increasingly clouded, exemplified by July’s low 24% probability of sunny days. Interestingly, this pattern shifts as autumn approaches, where October offers a hopeful 59% chance of sunshine, showcasing a return to brighter skies. Overall, August’s weather can be a bit gloomy, making those few sunny days all the more precious.
In Shimonoseki, Japan, the rhythm of daylight dances through the seasons, peaking in the summer months. Starting from 10 hours in January and February, daylight gradually lengthens, reaching a notable 14 hours in both June and July. As August arrives, daylight slightly decreases to 13 hours, marking a gentle shift towards the approaching autumn. This trend continues into September, where the sunshine dims to 12 hours, illustrating the gradual retreat of summer’s brilliance. The cycle continues with shorter days in October at 11 hours and further reductions through the colder months, culminating in a mere 9 hours of daylight by December. This ebb and flow of light beautifully captures the essence of seasonal change in Shimonoseki.
In Shimonoseki, Japan, August brings a gentle breeze, with an average wind speed of 4.5 m/s (10 mph), slightly increasing from the calmer months of July and June. This subtle uptick in wind speed reflects a gradual shift as summer wanes. Notably, the warmest months of the year exhibit lower wind speeds compared to the brisker winter months, where averages peak in January and February at 6.5 m/s and 6.7 m/s respectively. As autumn begins its approach in September, the winds start to strengthen again, hinting at the dynamic weather patterns that define this coastal region. Overall, August's mild wind serves as a reminder of the tranquil beauty that characterizes the late summer, setting the stage for the more invigorating breezes to come.
Weather in Shimonoseki varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Shimonoseki, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, Shimonoseki experiences warm temperatures with a minimum of 21°C (69°F) and an average of 27°C (81°F), peaking at 32°C (89°F). The month is characterized by high humidity at 93% and considerable rainfall, totaling 251 mm (9.9 in) over 13 days. In contrast, January is much cooler, with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 17°C (64°F) and an average of 8°C (46°F). The level of precipitation in January is significantly lower at 84 mm (3.3 in) across 12 days, accompanied by a relatively lower humidity of 76%. For more detailed information about January weather, you can refer to Shimonoseki weather in January.
August and February present a stark contrast in weather conditions. In August, the temperatures are notably warm, with a minimum of 21°C, an average of 27°C, and a maximum of 32°C, making it one of the hottest months. Humidity is high at 93%, accompanied by significant rainfall of 251 mm over 13 days, contributing to a muggy atmosphere. In contrast, February offers a much cooler climate, with temperatures ranging from a minimum of -1°C to a maximum of 18°C, averaging around 8°C. Precipitation is lower at 93 mm spread across 11 days, and the humidity is less oppressive at 72%. For more detailed insights into February weather, visit Shimonoseki weather in February.
In August, Shimonoseki experiences warm, humid weather, with average temperatures reaching around 27°C (81°F) and highs of 32°C (89°F). The month is characterized by significant rainfall, totaling 251 mm (9.9 in) over approximately 13 days, contributing to a high humidity level of 93%. In contrast, March offers much cooler conditions, with average temperatures plummeting to 11°C (52°F) and highs of just 18°C (64°F). During this month, there's still ample rainfall, amounting to 165 mm (6.5 in) over 12 days, but the humidity is considerably lower at 69%. For more detailed information on March weather, check Shimonoseki weather in March.
When comparing the weather in April and August, a stark contrast emerges. August is characterized by much warmer temperatures, with an average of 27°C (81°F) and maximums reaching up to 32°C (89°F), while April sees cooler conditions, with an average temperature of only 14°C (58°F) and a high of 22°C (71°F). Additionally, August experiences significantly higher humidity at 93% and more precipitation, totaling 251 mm (9.9 in) over 13 days, compared to April’s 129 mm (5.1 in) over just 10 days. For a more in-depth look at April's climate, visit Shimonoseki weather in April.
When comparing the weather in August and May, it's evident that August is significantly warmer and more humid. In August, temperatures range from a minimum of 21°C (69°F) to a maximum of 32°C (89°F), with an average of 27°C (81°F). In contrast, May has milder temperatures with a minimum of 12°C (54°F) and a maximum of 25°C (77°F), averaging 18°C (65°F). Additionally, August experiences more rainfall, with 251 mm (9.9 in) over 13 days, compared to May's 141 mm (5.5 in) over just 10 days. The humidity in August peaks at 93%, making it feel more oppressive than the 84% humidity typical in May. For more detailed information, you can check Shimonoseki weather in May.
When comparing the weather between June and August, it’s evident that August is significantly warmer and wetter. In August, temperatures range from a minimum of 21°C (69°F) to a maximum of 32°C (89°F), with an average of 27°C (81°F). In contrast, June is milder with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 27°C (81°F) and an average of 21°C (71°F). Additionally, August experiences more rainfall, totaling 251 mm (9.9 in) over 13 days, compared to June's 194 mm (7.7 in) over 11 days. Humidity is also higher in August, reaching 93% compared to June's 88%. For more details on June's weather, you can check Shimonoseki weather in June.
When comparing the weather in August to July, August presents slightly warmer temperatures, with an average of 27°C (81°F) compared to July's 25°C (78°F). The maximum temperatures in both months are similar, peaking at 32°C (89°F) in August and 31°C (88°F) in July. However, July experiences higher overall precipitation, with 295 mm (11.6 in) over 16 days, compared to August's 251 mm (9.9 in) over 13 days. Humidity remains high in both months, with August at 93% and July slightly higher at 95%. For more details on July weather, you can check Shimonoseki weather in July.
August and September present distinct weather patterns, with August typically experiencing warmer temperatures and higher humidity. In August, the minimum temperature averages around 21°C (69°F) and peaks at a maximum of 32°C (89°F), while September sees a slight decrease, with temperatures ranging from a low of 18°C (65°F) to a high of 32°C (89°F). Precipitation also varies, with August receiving 251 mm (9.9 in) over 13 days, compared to September’s 226 mm (8.9 in) over 12 days. Additionally, the humidity in August averages a steamy 93%, whereas September’s humidity drops to a more comfortable 84%. For more details on September weather, you can check Shimonoseki weather in September.
August and October present contrasting weather patterns. In August, temperatures soar with minimums reaching 21°C (69°F) and soaring to an average of 27°C (81°F) and a maximum of 32°C (89°F). This month is characterized by high humidity at 93% and significant rainfall, totaling 251 mm (9.9 in) over 13 days.
In contrast, October brings a noticeable drop in temperatures, with a minimum of 14°C (57°F), an average of 20°C (68°F), and a maximum of 27°C (82°F). The humidity decreases to 79%, and precipitation is also lower, with 121 mm (4.7 in) over 11 days. For more detailed insights, you can check Shimonoseki weather in October.
August and November present contrasting weather conditions. In August, temperatures soar with a minimum of 21°C (69°F) and averaging 27°C (81°F), reaching a peak of 32°C (89°F). This month is also characterized by high humidity at 93% and substantial rainfall, with 251 mm (9.9 in) falling over 13 days. In contrast, November experiences a significant drop in temperature, with a minimum of 8°C (46°F) and an average of 15°C (59°F), peaking at 23°C (74°F). The precipitation is much lighter in November, totaling 54 mm (2.1 in) across 8 days, and the humidity decreases to 76%. For more details on November weather, visit Shimonoseki weather in November.
August and December present stark contrasts in weather patterns. In August, temperatures soar with a minimum of 21°C (69°F) and a maximum of 32°C (89°F), accompanied by high humidity at 93%. This summer month also sees significant rainfall, averaging 251 mm (9.9 in) over 13 days. In contrast, December offers a much cooler climate, with temperatures ranging from a mild minimum of 1°C (34°F) to a comfortable maximum of 20°C (68°F) and an average of 10°C (50°F). Rainfall drops considerably to 89 mm (3.5 in) over just 12 days, and humidity levels decrease to 75%. For a detailed look at December weather, check out Shimonoseki weather in December.
August in Shimonoseki brings a stifling warmth characterized by high temperatures and significant humidity, creating a distinctly tropical atmosphere compared to the milder months preceding and following it. With an average temperature nearing 27°C (81°F) and extremes reaching up to 32°C (89°F), this month can feel particularly intense. Rainfall is also notable, with over 250 mm of precipitation spread across about half the days, contributing to the heavy humidity that often hovers around 93%. This combination makes August a high point for both temperature and rainfall, marking a departure from the drier and cooler climates of spring and autumn. For a comprehensive look at Shimonoseki's weather patterns throughout the year, visit Shimonoseki Climate.