Last updated: August 21, 2025
Experience the summer charm of Iwakuni, Japan in August, where the weather offers a delightful blend of heat and humidity. With maximum temperatures reaching 35°C (96°F) and an average of 28°C (82°F), this month is characterized by warm days ideal for outdoor exploration. Evenings cool down to a comfortable 20°C (67°F), providing a pleasant respite from the daytime heat. However, be prepared for 14 days of rain, contributing to a significant 256 mm (10.1 in) of precipitation, which keeps the lush landscapes vibrant. The humidity hovers around a remarkable 93%, creating a tropical atmosphere that accentuates the beauty of this historic city. Embrace the warmth and occasional showers as you discover all that Iwakuni has to offer this August!
In August, Iwakuni, Japan, experiences warm temperatures that reach their peak for the year. The month begins with a minimum temperature of 20°C (67°F), setting a comfortably warm tone, while the average temperature hovers around 28°C (82°F), making it an ideal time for outdoor activities. Daytime highs can soar up to 35°C (96°F), reminiscent of the sultry July, yet with slightly more moderation in the cooler evenings. This consistent warmth contrasts sharply with the chill of January, highlighting the shift from winter's grasp to the embrace of summer. As the region transitions into September, a gentle cool-down in temperatures is anticipated, but for August, residents and visitors alike can revel in the heat of summer's peak, enjoying the vibrant culture and natural beauty that Iwakuni has to offer.
In August, Iwakuni, Japan, experiences a notable shift in precipitation patterns, with an average rainfall of 256 mm (10.1 in) spread over 14 days. This marks a significant decrease from July's remarkable total of 386 mm (15.2 in), indicating a slight tapering off as summer progresses. The consistent wet conditions of the preceding months culminate in August's substantial rainfall, which still represents one of the year's wettest periods, yet sets the stage for a drier autumn. As the summer heat lingers, residents can expect frequent, albeit less intense, summer showers, contributing to the region's lush greenery and vibrant landscapes.
In Iwakuni, Japan, the humidity levels experience notable fluctuations throughout the year, peaking in the summer months. August stands out with a high humidity of 93%, reflecting the lingering warmth and moisture from July's peak of 95%. This trend of increasing humidity begins in May, where levels rise sharply to 84%, continuing through June and July, which are among the most humid months. An interesting shift occurs as autumn approaches, with September seeing a drop to 84% and steadily decreasing to 79% by October. Despite the initial summer mugginess, the fall months promise a more comfortable atmosphere as humidity levels gradually decline toward winter.
In Iwakuni, Japan, the UV Index peaks dramatically during the summer months, with August holding steady at a high 12 under the extreme exposure category, mirroring July's levels. This signifies a critical time for sun safety, as the burn time is reduced to just 10 minutes. As the year progresses from the mild indices of January and February, which have moderate exposures at 4 and 5, the UV levels rise sharply through the spring into a very high range by March. Continuing into April and May, the index escalates to an extreme 11, indicating that visitors and locals alike should prioritize sun protection. Interestingly, as autumn approaches, a gradual decrease in UV intensity occurs, dropping to 10 in September and further to 7 in October, providing a welcome reprieve. For more detailed insights, check out the complete Iwakuni UV Index.
UV Risk Categories
August in Iwakuni, Japan, shines as the month with the most sunshine hours, boasting an impressive 308 hours of radiant sunlight. This vibrant surge comes after a steady climb from January's modest 184 hours, showcasing a clear seasonal transition towards longer, sunnier days. As spring blossoms into summer, the increase is particularly marked between May and August, where the community basks in the warmth and light, peaking during this sun-soaked month. With sunshine hours gradually tapering off in the fall, August serves as a reminder of summer's abundant daylight, enriching both the landscape and the local lifestyle.
The likelihood of sunny weather in August in Iwakuni, Japan, reflects a seasonal trend of declining sun opportunities as summer progresses. At just 25%, August experiences one of the lowest chances of sunny days, continuing the downward trend initiated in the earlier summer months of June and July. This pattern sharply contrasts with the richer sunshine expected later in the year; for instance, October boasts a significant 59% chance of clear skies. As summer gives way to autumn, residents and visitors might find more favorable weather conditions just around the corner, highlighting a natural ebb and flow in Iwakuni's climate.
In Iwakuni, Japan, the month of August offers a delightful retreat into summer's embrace, with a rich 13 hours of daylight illuminating the landscape. As the year progresses, daylight duration reaches its peak in June and July with 14 hours, providing ample time for outdoor activities under the warm sun. Following this, August experiences a slight tapering, reflecting the gradual shift towards autumn as daylight hours decrease to 13. This pattern continues into the fall months, where daylight drops to 12 hours in September and further down to 11 hours by October. The transition from the longer days of summer to the shorter ones of winter is a reminder of nature's rhythmic cycles, inviting residents and visitors alike to cherish the lingering summer days before the light diminishes.
In August, Iwakuni experiences a gentle breeze, with an average wind speed of 2.6 m/s (6 mph). This marks a slight increase from the calmer winds of June and July, where speeds dipped to 1.8 m/s (4 mph) and 2.0 m/s (5 mph), respectively. The month sits comfortably between the milder summer winds and the slightly brisker gusts that announce the arrival of autumn in September, which shows a modest decline at 2.3 m/s (5 mph). Overall, August's breezes are characteristic of the late summer season, offering a refreshing counterbalance to the warmth while hinting at the transition to cooler months ahead.
Weather in Iwakuni varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Iwakuni, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present stark contrasts in weather. August boasts warm temperatures, with a minimum of 20°C (67°F) and an average of 28°C (82°F), peaking at a scorching 35°C (96°F). The month is also characterized by high humidity at 93% and significant rainfall, totaling 256 mm (10.1 in) over 14 days. In contrast, January sees a dramatic drop in temperatures, with a minimum of -4°C (25°F) and an average of just 5°C (42°F), reaching a maximum of 15°C (59°F). This month is much drier, receiving only 49 mm (1.9 in) of precipitation over 6 days and lower humidity at 76%. For more information on January weather specifics, visit Iwakuni weather in January.
The weather in August and February presents stark contrasts. August typically boasts warm temperatures, with a minimum of 20°C (67°F), an average of 28°C (82°F), and highs reaching 35°C (96°F). This month also experiences significant rainfall, averaging 256 mm (10.1 in) over about 14 days, paired with high humidity levels around 93%. In contrast, February offers much cooler conditions, with temperatures ranging from a minimum of -4°C (26°F) to a maximum of 20°C (68°F) and an average of 6°C (43°F). Precipitation is considerably lower at 69 mm (2.7 in) and occurs over just 7 days, along with a humidity level of 72%. For more specific insights, you can check out Iwakuni weather in February.
The weather in August is significantly warmer and more humid compared to March. During August, temperatures range from a minimum of 20°C (67°F) to a scorching maximum of 35°C (96°F), with an average of 28°C (82°F). In contrast, March experiences much cooler temperatures, with a minimum of 1°C (33°F) and a maximum of 22°C (71°F), averaging at 10°C (50°F). Additionally, August sees higher precipitation levels at 256 mm (10.1 in) over 14 days, while March has only 125 mm (4.9 in) spread over 10 days. The humidity is also notably higher in August at 93%, compared to March's 69%. For more details on the weather during March, check out Iwakuni weather in March.
August and April present stark contrasts in weather, with August characterized by warm temperatures and high humidity. In August, temperatures range from a minimum of 20°C (67°F) to a sweltering maximum of 35°C (96°F), while the average temperature sits at a balmy 28°C (82°F). Additionally, August experiences significant precipitation, with 256 mm (10.1 in) over 14 days, contributing to the heightened humidity of 93%.
In contrast, April offers much cooler conditions, with temperatures ranging from a chilly minimum of 2°C (36°F) to a pleasant maximum of 24°C (76°F), leading to an average temperature of 14°C (58°F). While April sees lower precipitation levels of 137 mm (5.4 in) over 9 days, the humidity is also less oppressive at 75%. For more detailed information, you can refer to Iwakuni weather in April.
In comparing the weather between August and May, August emerges as significantly warmer and more humid. With average temperatures rising to 28°C (82°F) and maximums reaching up to 35°C (96°F), it creates a lively atmosphere despite the high precipitation of 256 mm (10.1 in) over 14 days. In contrast, May offers a more moderate climate, with temperatures ranging from a minimum of 7°C (45°F) to a comfortable average of 19°C (66°F), accompanied by less rainfall at 136 mm (5.4 in) over 9 days. The humidity in May at 84% is also lower than in August, making it a more pleasant time to be outdoors. For a closer look at May's climate, you can check Iwakuni weather in May.
When comparing the weather in August and June, August tends to be significantly warmer and more humid. In August, temperatures range from a minimum of 20°C (67°F) to an average of 28°C (82°F), peaking at 35°C (96°F). In contrast, June sees milder temperatures, with a minimum of 14°C (57°F), an average of 22°C (72°F), and a maximum of 29°C (85°F). While both months experience precipitation on approximately 14 days, August receives considerably more rainfall, with 256 mm (10.1 in) compared to June's 181 mm (7.1 in). Humidity levels also rise in August to 93%, making it feel more muggy than the 88% humidity found in June. For a detailed look at June weather, you can check Iwakuni weather in June.
In comparing the weather of August and July, August tends to be slightly warmer, with average temperatures reaching 28°C (82°F) compared to July's 26°C (79°F). Both months experience a maximum temperature of 35°C (95°F), but August has a higher minimum temperature of 20°C (67°F) compared to July's 18°C (65°F). However, August sees a notable increase in precipitation, with 256 mm (10.1 in) falling over 14 days, whereas July has a higher rainfall total of 386 mm (15.2 in) over 19 days. Humidity levels are quite similar, with August at 93% and July slightly elevated at 95%. For more detailed information about July weather, you can check Iwakuni weather in July.
August and September present a noticeable shift in weather patterns. In August, temperatures soar with a minimum of 20°C (67°F) and an average of 28°C (82°F), reaching a maximum of 35°C (96°F), while humidity remains high at 93%. This month also experiences significant rainfall, totaling 256 mm (10.1 in) over 14 days. In contrast, September brings a cooler climate, with a minimum temperature of 15°C (60°F) and an average of 24°C (75°F), peaking at 33°C (92°F). Precipitation decreases slightly to 237 mm (9.3 in), also spread over 14 days, and humidity drops to 84%. For more detailed information on September weather in the region, visit Iwakuni weather in September.
August and October present a stark contrast in weather conditions. In August, temperatures soar with a minimum of 20°C (67°F) and an average high of 35°C (96°F), accompanied by high humidity at 93%. The month sees significant rainfall as well, with 256 mm (10.1 in) over about 14 days. In comparison, October experiences much cooler temperatures, with a minimum of 8°C (46°F) and a more moderate average of 19°C (66°F), and a maximum of 29°C (85°F). Precipitation in October is lower at 172 mm (6.8 in) over about 10 days, and humidity drops to a more manageable 79%. For more details, check out Iwakuni weather in October.
August and November present stark contrasts in weather patterns. In August, temperatures soar with a minimum of 20°C (67°F) and an average of 28°C (82°F), peaking at 35°C (96°F), making it the warmest month of the year. The month is also characterized by high humidity at 93% and significant precipitation, totaling 256 mm (10.1 in) over about 14 days. In contrast, November experiences much cooler temperatures, with a minimum of 2°C (36°F) and an average of 13°C (55°F), while highs only reach 23°C (74°F). Precipitation drops drastically to 37 mm (1.5 in) over just 5 days, and humidity decreases to 76%. For more information on the weather in November, you can check Iwakuni weather in November.
August and December weather in Iwakuni present stark contrasts in temperature and humidity. In August, temperatures soar with a minimum of 20°C (67°F), averaging 28°C (82°F), and peaking at a sweltering 35°C (96°F). The month is also characterized by significant rainfall, with 256 mm (10.1 in) of precipitation over 14 days, and high humidity levels reaching 93%. In contrast, December experiences much cooler temperatures, with a minimum of -1°C (31°F), an average of 7°C (46°F), and a maximum of 20°C (69°F). Rainfall is considerably lighter, totaling 61 mm (2.4 in) over just 6 days, and humidity drops to 75%. For more detailed information on December weather, you can check Iwakuni weather in December.
August in Iwakuni is characterized by hot and humid conditions, setting it apart from other months. With an average temperature pushing towards a sweltering 28°C, this month often feels warmer due to the high humidity levels that hover around 93%. Frequent rainfall, occurring on about 14 days, adds to the total precipitation of 256 mm, making August one of the wetter months of the year. As the summer peaks, residents and visitors alike experience a vibrant, lively atmosphere, but should be prepared for the heat and occasional downpours. For more detailed insights into Iwakuni's weather, visit Iwakuni Climate.