Last updated: August 21, 2025
August in Onomichi, Japan, offers a tropical climate characterized by warm temperatures and elevated humidity levels. With a maximum temperature reaching 37°C (99°F), the month is sweltering, while the average temperature settles at a comfortable 29°C (85°F). Nighttime brings relief with a minimum temperature of 20°C (68°F). Precipitation is significant, with an accumulated total of 166 mm (6.5 in) over 11 days, enhancing the area's lush landscapes. Humidity levels soar to an average of 92%, making this summer month a vivid experience for both residents and visitors alike.
In August, Onomichi experiences its warmest days of the year, with temperatures averaging a steamy 29°C (85°F). The month kicks off with minimums rising to 20°C (68°F), setting the stage for sunny adventures. As the thermometers soar, August can see maximum highs reaching up to 37°C (99°F), providing ample opportunity for beach-goers and outdoor enthusiasts to bask in the heat. This peak in temperature not only highlights a consistent upward trend from the cooler months but also emphasizes the transition from the vibrant green of summer to the early signs of autumn approaching in September. Overall, August stands out as a lively, warm month, perfect for exploring the scenic beauty of this charming Japanese locale.
In Onomichi, Japan, August sees a notable dip in precipitation compared to the torrential rains of July, with an average of 166 mm (6.5 in) of rainfall spread over 11 days. This is a significant decrease from July's staggering 314 mm (12.4 in), which is the peak of the wet season. However, August still retains considerable moisture, contributing to the region's lush landscapes. Following this trend, September witnesses a slight increase again, with 174 mm (6.9 in), indicating a transitional period as summer gives way to autumn. Overall, while August’s rainfall is substantial, it serves as a breather in the typically humid Japanese summer, preparing the ground for the seasonal shifts ahead.
In Onomichi, Japan, August brings the peak of humidity, mirroring July's sticky embrace with a notable 92% level. This summer month, characterized by warm temperatures, fits a clear trend of rising humidity from the onset of the year. After a gradual decline from the chill of January's 82%, humidity begins to climb again in late spring, reaching a high of 86% by June. The interplay of heat and moisture intensifies through the summer months, marking the pinnacle of the year in August before a slight easing begins in September at 87%. Overall, the data reveals a compelling shift from drier winter months to the oppressively humid atmosphere of summer, solidifying Onomichi's reputation for its warm, moist climate.
In August, Onomichi experiences an extreme UV Index of 12, continuing the trend from July. With a burn time of just 10 minutes, it's crucial for outdoor enthusiasts to take precautions against the sun's aggressive rays. This month marks the peak of summer, where the UV intensity remains notably high, reinforcing the need for sun protection. Following August, the UV Index gradually dips in September to 10, indicating a slight return to very high levels. For those planning outdoor activities during this time, it's essential to stay informed and protected. To learn more about local UV trends, visit Onomichi UV Index.
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In August, Onomichi basks in an impressive 309 hours of sunshine, making it the sunniest month of the year. This peak reflects a delightful upward trend in daylight hours, as the city transitions from the cooler, less sunny days of winter through the spring and into summer. From 184 hours in January to 305 hours in May, the gradual increase sets the stage for this peak. Following August, sunshine levels recede to 261 hours in September, hinting at the onset of autumn. This pattern of rising and falling light not only marks the changing seasons but also paints a vivid portrait of Onomichi's vibrant climate, offering visitors the best of summer's warmth when the days are longest and brightest.
In Onomichi, Japan, the likelihood of sunny weather in August is relatively modest, with a 28% chance of sunshine. This trend reflects a notable dip in sunny days compared to the earlier months of the year. As summer progresses, the chances of clear skies diminish, peaking in January at 47% and steadily declining to a low in July. Interestingly, as one moves into the fall, the odds of sunny weather begin to recover, suggesting that while August may be balmy, those anticipating bright days might want to keep their expectations in check. Overall, August offers a blend of warmth and clouds, characteristic of the region's humid summer climate.
In Onomichi, Japan, the daylight duration experiences a graceful ebb and flow throughout the year. August, with its 13 hours of daylight, marks a transition from the peak of summer, where the sun lingers longest in June and July at 14 hours. As the days begin to shorten, August retains a generous amount of light, perfect for enjoying the vibrant summer atmosphere. Following this, September sees a gentle decline to 12 hours, paving the way for the cooler months ahead. This pattern highlights a clear trend of increasing daylight in the spring, peaking in summer, and gradually tapering as fall approaches, creating a rhythmic dance of light that shapes the seasonal experience in this picturesque coastal town.
In August, the coastal town of Onomichi, Japan, experiences a gentle breeze with an average wind speed of 2.4 m/s (5 mph), mirroring the tranquil stillness that typically characterizes the height of summer. This calming wind velocity aligns with the lower averages seen in June and July, suggesting a respite from the stronger gusts earlier in the year. As the seasons transition, September and October maintain this softness, further reinforcing a trend of consistent gentility that permeates the summer months. Despite the dip in wind speed, the ambiance of Onomichi remains vibrant, with the warm summer air rustling through its scenic landscapes, inviting leisurely exploration and reflection.
Weather in Onomichi varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Onomichi, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present stark contrasts in weather. In August, temperatures soar with a minimum of 20°C (68°F), averaging 29°C (85°F) and peaking at a sweltering 37°C (99°F). The month is characterized by high humidity at 92% and significant precipitation, totaling 166 mm (6.5 in) over about 11 days. Conversely, January brings much cooler conditions, with temperatures ranging from a minimum of -5°C (24°F) to a maximum of 15°C (59°F) and an average temperature of only 6°C (43°F). This winter month experiences less rain, averaging 40 mm (1.6 in) over just 5 days, along with a lower humidity level of 82%. For more detailed information, you can check Onomichi weather in January.
August and February present stark contrasts in weather conditions. August boasts a minimum temperature of 20°C (68°F) and an average high of 29°C (85°F), with maximum temperatures reaching up to 37°C (99°F). The month is characterized by high humidity at 92% and significant rainfall, accumulating 166 mm (6.5 in) over approximately 11 days. In contrast, February experiences much cooler temperatures, with a minimum of -3°C (26°F) and an average of 6°C (44°F), peaking at a maximum of 20°C (69°F). Precipitation in February is considerably lower at 54 mm (2.1 in) over just 6 days, coupled with a humidity level of 79%. For a closer look at February weather, check out Onomichi weather in February.
The weather in August is significantly warmer and more humid than in March. While August experiences average temperatures around 29°C (85°F) with maximums reaching up to 37°C (99°F) and a high humidity of 92%, March offers much cooler conditions, averaging only 10°C (51°F) and peaking at 23°C (73°F). Additionally, the summer month of August sees more rainfall with 166 mm (6.5 in) over approximately 11 days, compared to March's 93 mm (3.7 in) over 9 days. For more specific details on March weather, you can check Onomichi weather in March.
In August, temperatures soar, with averages around 29°C (85°F) and highs reaching up to 37°C (99°F), while the humidity is notably high at 92%. This month also experiences significant rainfall, with about 166 mm (6.5 in) over approximately 11 days. In contrast, April offers a much cooler climate, where temperatures range from a chilly minimum of 2°C (36°F) to a pleasant maximum of 26°C (79°F), averaging around 15°C (59°F). The precipitation in April is lower at 117 mm (4.6 in) over about 8 days, and humidity is more moderate at 74%. For more specific details on April weather, you can visit Onomichi weather in April.
In comparing the weather of August and May, one can see a significant contrast in temperature and humidity levels. August boasts a much hotter climate, with average temperatures reaching 29°C (85°F) and highs peaking at 37°C (99°F), whereas May features a milder average of 20°C (68°F) and a maximum of 31°C (89°F). Humidity levels are also higher in August at 92%, compared to May's 84%. Precipitation is more frequent in August, with 166 mm (6.5 in) over 11 days, whereas May experiences 107 mm (4.2 in) over 9 days. For those interested in learning more about May's weather patterns, check out Onomichi weather in May.
In June, temperatures gradually rise, with minimums around 13°C (56°F) and daytime averages reaching about 23°C (74°F), whereas August sees much warmer conditions, with averages climbing to 29°C (85°F) and maximums soaring to 37°C (99°F). While June experiences a slightly lower precipitation level of 149 mm (5.9 in) over 12 days, August is notably wetter, receiving 166 mm (6.5 in) across 11 days and exhibiting higher humidity at 92% compared to June's 86%. For more detailed insights into June's climate, visit Onomichi weather in June.
When comparing the weather between July and August, it's clear that both months have their warm characteristics, but August tends to be slightly warmer overall. In August, temperatures range from a minimum of 20°C (68°F) to a maximum of 37°C (99°F) with an average of 29°C (85°F), while July’s temperatures range from a minimum of 19°C (66°F) to a maximum of 38°C (100°F) with an average of 27°C (81°F). However, July experiences significantly more rainfall, with a total precipitation of 314 mm (12.4 in) over 17 days compared to August's 166 mm (6.5 in) over 11 days. Both months share a high humidity level of 92%, contributing to the sultry conditions. For more detailed insights, you can visit Onomichi weather in July.
August and September weather show a notable transition as summer wanes into early autumn. In August, temperatures range from a minimum of 20°C to a maximum of 37°C, with an average of 29°C, and the month experiences high humidity at 92%. Precipitation is significant, totaling 166 mm over 11 days. Conversely, September sees a drop in the average temperature to 25°C, with minimums of 14°C and maximums reaching 35°C. While September experiences a slight increase in precipitation to 174 mm over 12 days, humidity decreases slightly to 87%. This change marks a gradual cooling trend, making September generally more comfortable than the sweltering heat of August. For more specific insights, you can refer to Onomichi weather in September.
The weather in August is characterized by significantly higher temperatures, with averages peaking at 29°C (85°F) and maxing out at 37°C (99°F), compared to a cooler October, where the average is 19°C (67°F) and highs reach 32°C (89°F). Humidity levels are also notably higher in August at 92%, while October sees a decrease to 85%. Despite both months experiencing notable rainfall, August typically has around 166 mm (6.5 in) over 11 days, whereas October has a similar precipitation level of 164 mm (6.4 in) but over just 9 days. For a more detailed understanding of October weather, you can refer to Onomichi weather in October.
August and November present strikingly contrasting weather conditions. In August, temperatures soar with a minimum of 20°C (68°F) and an average high of 29°C (85°F), reaching as high as 37°C (99°F). This month is also characterized by high humidity at 92% and significant rainfall, totaling 166 mm (6.5 in) spread over 11 days. In sharp contrast, November experiences much cooler temperatures, with a minimum of 1°C (35°F), an average of 13°C (56°F), and a maximum of 24°C (75°F). The precipitation is notably lighter at just 31 mm (1.2 in) over 4 days, and the humidity decreases slightly to 84%. For a detailed look at November weather in Onomichi, check out Onomichi weather in November.
In August, the weather is characterized by warm temperatures, with a minimum of 20°C (68°F) and an average of 29°C (85°F), peaking at a scorching 37°C (99°F). This month also experiences significant rainfall, totaling 166 mm (6.5 in) over approximately 11 days, alongside high humidity levels of 92%. In contrast, December brings a much cooler climate, with temperatures ranging from a minimum of 0°C (32°F) to an average of 8°C (46°F), reaching a maximum of 20°C (69°F). The precipitation decreases substantially to 45 mm (1.8 in) spread over just 6 days, and humidity drops slightly to 82%. For more details on December weather in Onomichi, check out Onomichi weather in December.
August in Onomichi is marked by sweltering temperatures and high humidity, creating a distinctly tropical atmosphere compared to other months. With averages soaring around 29°C (85°F) and peaks reaching a staggering 37°C (99°F), this month can feel particularly intense. Precipitation is also higher than in many other months, with 11 rainy days contributing to a total of 166 mm of rain, which adds to the overall muggy feel. This combination of heat and moisture makes August not only the warmest month but also one of the most humid, resulting in a unique summer experience. To explore more about the weather patterns in Onomichi, visit Onomichi Climate.