Last updated: August 21, 2025
In August, Setouchi, Japan experiences a warm and humid climate characterized by maximum temperatures reaching up to 32°C (91°F) and an average temperature of about 28°C (82°F). The evenings offer some relief with minimum temperatures dropping to 21°C (69°F). However, visitors should be prepared for precipitation, as the region sees an average of 173 mm (6.8 in) across 12 rainy days throughout the month. With humidity levels soaring at 92%, this time of year in Setouchi is a blend of tropical warmth and refreshing showers, perfect for those seeking a unique summer experience.
In Setouchi, Japan, August brings the heat with temperatures averaging 28°C (82°F), peaking at a sizzling 32°C (91°F). This summer month marks a noticeable rise compared to the milder conditions of spring and early summer, reflecting a broader trend of increasing warmth. With minimum temperatures also elevated at 21°C (69°F), August is distinctly warmer than its predecessors, such as July, which had a similar maximum but lower overall average. As the summer progresses, residents and visitors experience lush landscapes, vibrant festivals, and opportunities to enjoy the coastal beauty, making August a peak time for outdoor activities under the sun.
In August, Setouchi, Japan, experiences a notable increase in precipitation, recording 173 mm (6.8 in) of rain over 12 days. This amount represents a sharp drop from July's record-high of 303 mm (11.9 in) but contributes to the region's overall wet summer months. The rainfall peaks of the preceding July set the stage for August’s steady showers, maintaining the lushness of the countryside while tempering the heat of summer. Interestingly, the transition into September reveals even heavier rains, with precipitation climbing to 222 mm (8.7 in), indicating a tendency for the late summer and early autumn months to be significantly wetter. This pattern illustrates Setouchi's dynamic climate, where fluctuating rainfall amounts are key to its seasonal cycles.
During the summer months in Setouchi, Japan, humidity reaches its peak, creating a rich, tropical atmosphere. August, in particular, showcases a remarkable 92% humidity, mirroring July's levels. This is part of a noticeable trend: the humidity steadily climbs from 73% in March and 74% in April, culminating in the sultry conditions of midsummer, which often lead to a heavy, warm air that defines this season. While September brings a slight respite at 87%, the high humidity persists throughout the year, with October and November still showcasing values above 80%. This persistent moisture contributes to Setouchi's lush landscapes, making it a vibrant destination, even as the seasons change.
In August, Setouchi, Japan, experiences an UV Index of 11, categorized as extreme, making sun protection essential with a burn time of just 10 minutes. This peak in ultraviolet radiation reflects a broader trend observed throughout the summer months, with July also hitting a high of 12. Prior months, starting from April, consistently exhibit extreme levels, signaling that the region faces significant UV exposure. As the year progresses towards September, there is a slight drop to a UV Index of 10, still reflecting very high levels, but it's a reminder to remain vigilant as outdoor activities increase in warmth and brightness. For more detailed insights on UV levels, check out Setouchi UV Index.
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August shines as the pinnacle of sunlight in Setouchi, Japan, boasting 306 hours of glorious rays. This month not only signifies the height of summer but also reflects a consistent upward trend in sunshine hours as the year progresses. From the 177 hours in January, daylight steadily increases, with each month revealing more sun-kissed days. April and May see a notable surge, culminating in August's brilliant display, before a gentle decline in the fall months. This pattern highlights Setouchi's rhythmic embrace of warmth and light, making August a perfect time to bask in the beautiful outdoors.
In Setouchi, Japan, the likelihood of sunny weather takes a noticeable dip during the summer months. August, while still a summer favorite, holds a modest 31% chance of sun—an increase from July's 29%, but significantly less than the sun-soaked days witnessed in the late fall and winter. This trend is consistent across the season, showing a gradual decline in sunny days from May, reaching a low in June and July. As August approaches, the weather may offer a mix of sunshine and clouds, hinting at the transition toward brighter, clearer skies by October, which boasts a revitalizing 57% chance of sun. Thus, while August invites warm temperatures, it presents a balanced blend of summer's warmth and the cloudy undertones of a waning season.
In Setouchi, Japan, the daylight duration showcases a clear seasonal rhythm, reflecting the passage of time through the year. August, with its 13 hours of daylight, continues the trend initiated in the summer months, where June and July also bask in the same generous light. Following a gradual increase from spring—where March and April hint at longer days—June reaches a peak of 14 hours before the sunlight begins to wane. As summer gives way to autumn, September sees a slight decline to 12 hours, hinting at the upcoming cooler months. This gentle ebb and flow of daylight highlights the beauty of seasonal change, inviting residents and visitors alike to enjoy the vibrant, sunlit days of summer before transitioning into the cozy embrace of fall.
In Setouchi, Japan, August brings a gentle respite from the summer's heat, with average wind speeds reaching 3.9 m/s (9 mph). This month stands out as a transitional period, following a decrease in wind throughout July, where the breezes dipped to their lowest at 2.9 m/s (6 mph). As autumn approaches, the winds begin to pick up again, with September and October both experiencing slightly higher averages of 3.6 m/s (8 mph) and 3.7 m/s (8 mph) respectively. Interestingly, the winds show a seasonal trend, starting off stronger in winter, peaking in December at 5.1 m/s (11 mph). Overall, August’s winds provide a pleasant balance, serving as a reminder of the shifting seasons in this beautiful region.
Weather in Setouchi varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Setouchi, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present starkly contrasting weather conditions. In August, the average temperature is a warm 28°C (82°F), with highs reaching up to 32°C (91°F) and a notable humidity of 92%. This summer month also sees significant rainfall, with 173 mm (6.8 in) of precipitation spread over approximately 12 days. In contrast, January experiences much colder temperatures, with an average of just 6°C (43°F) and lows dropping to -2°C (29°F). The winter month has significantly less precipitation, totaling 39 mm (1.5 in) over about 5 days, and a more moderate humidity of 82%. For a deeper insight into winter weather in this region, you can check Setouchi weather in January.
August and February present strikingly contrasting weather conditions. In August, the temperatures range from a minimum of 21°C (69°F) to a sweltering average of 28°C (82°F), peaking at around 32°C (91°F), coupled with high humidity levels of 92%. This month also sees significant rainfall, with approximately 173 mm (6.8 in) spread over 12 days. In contrast, February experiences much colder temperatures, with a minimum of -3°C (28°F), an average of 6°C (43°F), and a maximum of 15°C (60°F). Precipitation is minimal, totaling 55 mm (2.2 in) over just 6 days, and humidity is lower at 79%. For a detailed look at February weather in this region, you can refer to Setouchi weather in February.
August and March present strikingly contrasting weather conditions. In August, temperatures are much warmer, with daily averages around 28°C (82°F), peaking at 32°C (91°F), while March only sees average temperatures of 9°C (49°F) and a maximum of 18°C (64°F). August is also characterized by high humidity levels at 92% and substantial rainfall, with around 173 mm (6.8 in) falling over 12 days. In comparison, March has lower humidity at 73%, with less precipitation totaling 108 mm (4.2 in) over 10 days. For those interested in the specifics of March weather, additional details can be found here: Setouchi weather in March.
The weather in August is notably warmer and more humid than in April. With minimum temperatures around 21°C (69°F) and average highs reaching 32°C (91°F), August experiences a much higher temperature range compared to April's mild highs of 21°C (71°F) and lows of 4°C (40°F). Additionally, August sees higher rainfall, with 173 mm (6.8 in) falling over 12 days, while April has 130 mm (5.1 in) of precipitation spread across just 9 days. The humidity in August also peaks at 92%, significantly higher than the 74% experienced in April. For a more detailed look at the weather in April, you can visit Setouchi weather in April.
August and May present contrasting weather patterns, reflecting the shift from spring to deep summer. In August, temperatures soar with a minimum of 21°C (69°F) and an average high of 32°C (91°F), creating a warm, humid environment with an average humidity level of 92%. In contrast, May features much cooler temperatures, ranging from a minimum of 10°C (50°F) to a maximum of 25°C (77°F), making it a more comfortable month overall. While both months experience notable rainfall, August sees 173 mm (6.8 in) over 12 days, compared to May's 131 mm (5.2 in) spread over 9 days. For more detailed insights, you can check Setouchi weather in May.
In comparing the weather between August and June, August generally presents warmer temperatures, with a minimum of 21°C (69°F) and an average of 28°C (82°F), compared to June's cooler minimum of 15°C (59°F) and average of 22°C (71°F). Additionally, the maximum temperatures in August can reach up to 32°C (91°F), whereas June peaks at 27°C (80°F). While both months experience similar amounts of precipitation—173 mm (6.8 in) in August and 164 mm (6.5 in) in June—the humidity is noticeably higher in August at 92%, compared to June’s 86%. For a detailed overview of June weather, you can check Setouchi weather in June.
In comparing the weather of August and July, both months experience high temperatures with averages hovering around 28°C (82°F) in August and 26°C (78°F) in July. Interestingly, July matches the maximum temperature of 32°C (91°F) seen in August, but overall, August tends to be warmer with slightly higher minimum temperatures, averaging 21°C (69°F) compared to July's 20°C (69°F). However, August has significantly less precipitation, totaling 173 mm (6.8 in) over 12 days, while July is much wetter, with 303 mm (11.9 in) falling over 16 days. Both months share a high humidity level of 92%, contributing to a consistently muggy atmosphere. For more detailed information on July weather specifically, you can visit Setouchi weather in July.
August and September present notable contrasts in weather patterns. August tends to be warmer, with average temperatures reaching 28°C (82°F) and maximums peaking at 32°C (91°F). However, it also experiences significant precipitation of 173 mm (6.8 in) over 12 days, coupled with high humidity at 92%. In contrast, September sees a slight decrease in average temperature to 24°C (76°F) and a minimum of 17°C (64°F), though maximum temperatures remain relatively high at 31°C (89°F). Interestingly, September experiences even more rainfall, totaling 222 mm (8.7 in) over 13 days, while humidity decreases slightly to 87%. For more detailed insights into September weather, check out Setouchi weather in September.
August and October present quite different weather patterns. August is characterized by warmer temperatures, with minimums around 21°C (69°F) and maximums reaching up to 32°C (91°F), making for a hot and humid month with an average humidity of 92%. In contrast, October experiences cooler temperatures, with averages dropping to 19°C (67°F) and maximums peaking at 27°C (82°F), while the minimum temperature can be as low as 12°C (54°F). Interestingly, October also sees a slight increase in precipitation, totaling 211 mm (8.3 in) over 11 days, compared to August's 173 mm (6.8 in) over 12 days, yet with lower humidity at 85%. For more detailed information, you can visit Setouchi weather in October.
August and November present stark contrasts in weather. In August, temperatures soar with a minimum of 21°C (69°F) and an average of 28°C (82°F), peaking at 32°C (91°F). The month is also characterized by high humidity at 92% and substantial rainfall, with 173 mm (6.8 in) spread over 12 days. In contrast, November cools down significantly, with a minimum temperature of 6°C (43°F) and an average of 14°C (57°F), reaching a maximum of 22°C (71°F). Precipitation is much lower in November, totaling 38 mm (1.5 in) over just 5 days, and the humidity decreases slightly to 84%. For more details on November weather, you can check Setouchi weather in November.
August and December exhibit stark contrasts in weather patterns. In August, temperatures soar, with averages around 28°C (82°F) and highs reaching up to 32°C (91°F), accompanied by high humidity levels of 92%. The month is quite wet, recording about 173 mm (6.8 in) of precipitation over 12 days. In contrast, December presents a much cooler climate, with average temperatures dropping to 9°C (48°F) and maximums only reaching 19°C (66°F). Precipitation is significantly lower at 52 mm (2.0 in), occurring over just 6 days, and humidity also decreases to 82%. For more details about December weather in the Setouchi region, you can visit Setouchi weather in December.
As you explore Setouchi's vibrant August weather, you'll notice a significant shift from other months. The heat intensifies, with warm temperatures averaging around 28°C and peaking at a steamy 32°C. While balmy conditions invite outdoor adventures, the high humidity of 92% can make the air feel heavier. Expect a fair amount of rain, too, with 173 mm of precipitation over about 12 days—a reminder of the summer monsoon’s lingering presence. This unique combination creates a lively atmosphere perfect for experiencing the region's lush landscapes. For more details on the region's climate throughout the year, visit Setouchi Climate.