Last updated: August 21, 2025
August in Osaka, Japan brings a warm and humid atmosphere, with temperatures reaching a maximum of 38°C (101°F) and an average of 29°C (85°F). Evenings offer a slight reprieve with minimum temperatures around 19°C (66°F). Rainfall is common this month, amounting to 183 mm (7.2 in) over 12 days, contributing to the high humidity levels of 91%. Visitors and locals alike should prepare for both the sweltering heat and the occasional downpour while enjoying the vibrant summer in this bustling city.
In August, Osaka experiences some of its hottest weather, with temperatures soaring to a maximum of 38°C (101°F). The month starts with a warm minimum of 19°C (66°F), leading to an average temperature of 29°C (85°F), making it a vibrant time for outdoor activities and local festivals. Following the heat wave of July, which reaches a peak of 37°C (99°F), August continues the trend of high temperatures before the onset of cooler September, where averages drop to 25°C (78°F). This sweltering summer month highlights Osaka's transition from the milder, breezy temperatures of spring to the intense heat of late summer, embracing a lively atmosphere filled with energetic pursuits.
August in Osaka brings a significant drop in monthly rainfall compared to the torrential downpours of July, yet still retains a healthy average of 183 mm (7.2 in), falling on approximately 12 days throughout the month. This places August as one of the wetter months, characterized by a blend of intense summer heat and periodic summer showers. The rainfall pattern reflects a shift from July's peak to a slightly more moderate level, hinting at the gradual transition toward autumn. Notably, August's precipitation is not only crucial for replenishing local water sources but also marks a continuation of the trend of increased rainfall that begins in May, demonstrating the region's typical climate dynamics as it moves from summer into the early hints of fall.
In August, Osaka experiences a significant humidity level of 91%, preserving the city's reputation for a muggy summer. Following a peak in July at 93%, the humidity sees a slight decrease but remains noticeably high, reflecting the warm, tropical climate prevalent at this time. This trend of elevated humidity is consistent, with levels typically rising from June’s 87% and peaking during the summer months before gradually tapering off in the fall. As autumn approaches, September and October showcase a drop to 87% and 85%, respectively, hinting at cooler, more comfortable conditions ahead.
In August, Osaka experiences a UV Index of 11, marking it as a time of extreme exposure with a burn time of just 10 minutes. This aligns with the city's summer trend, where the UV Index peaks from July to September; however, August sees a slight dip from July's peak of 12. As the season progresses, UV levels remain considerably high, emphasizing the need for sun protection to avoid skin damage. Visitors and locals alike must be especially mindful of sun safety in this sweltering heat. For more detailed information on the UV Index, check out Osaka UV Index.
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August in Osaka graces residents and visitors with an impressive 305 hours of sunshine, marking it as one of the sunniest months of the year. This peak in sunlight contrasts sharply with the winter months, where January provides the least sunshine at just 185 hours. As the seasons transition, the trend shows a gradual increase in sunny days from early spring, beginning with 265 hours in March and surging to 291 hours in May. The warmth of summer not only brightens August but also boasts a noticeable drop in sunlight during the fall months, with September and October nestled comfortably below 250 hours. This delightful ascent to summer’s apex paints Osaka as a vibrant city bursting with sunny days, ideal for outdoor adventures and immersing in the beauty of its cultural offerings.
In Osaka, Japan, the likelihood of sunny weather in August reflects a dip, with only 28% chance of sun. This trend continues the pattern seen throughout the summer months, where the chances remain relatively low compared to the rest of the year. July boasts a 32% chance, while June drops to just 24%, indicating that the peak of summer doesn't guarantee bright skies. As we transition into autumn, the chances improve significantly, with October reaching 53% and December peaking at 57%. This suggests that if you're hoping for sunny days, you might be better off planning your visit later in the year!
In Osaka, Japan, the daylight duration experiences a captivating transformation throughout the year. Starting from January, daylight lingers for about 10 hours, maintaining this steady rhythm through February. As spring approaches in March, the days gradually lengthen to 11 hours. By April and May, the arrival of warmer days ushers in 13 hours of daylight, encouraging outdoor activities and blooming landscapes. The peak summer months of June and July bask in the longest daylight of the year at 14 hours, creating the perfect backdrop for vibrant festivals and late-night strolls. However, as August rolls in, daylight recedes slightly to 13 hours, foreshadowing the upcoming shift. The transition into fall begins with September, featuring 12 hours of light, before tapering off to 11 hours in October and declining further through the end of the year. This rhythmic ebb and flow of daylight not only marks the changing seasons but also enriches the daily life and culture of Osaka.
In Osaka, Japan, the August wind brings a gentle breath of relief from the summer heat, with an average speed of 2.4 m/s (5 mph). This month stands out with a slight increase compared to the calmer winds of June and July, which see averages of 1.8 m/s (4 mph) and 2.0 m/s (4 mph), respectively. Interestingly, August maintains a moderate flow that sets the stage for the transition into autumn, echoing the trends observed in September and October, where winds stabilize again at 2.2 m/s (5 mph). Overall, the data reveals a consistent rhythm of mild breezes for most of the year, while August presents a refreshing shift that tempers the summer warmth, enhancing the city's vibrant atmosphere.
Weather in Osaka varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Osaka, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January in Osaka present a striking contrast in weather conditions. In August, the temperatures soar, with averages around 29°C (85°F) and peaks reaching up to 38°C (101°F), accompanied by high humidity levels of 91%. This month also sees significant rainfall, totaling 183 mm (7.2 in) over approximately 12 days. In contrast, January brings much cooler temperatures, with a minimum of -3°C (26°F) and an average of just 6°C (42°F). Precipitation during this month is much lower at 46 mm (1.8 in) over 6 days, and humidity drops to 82%. For a deeper insight into January's climate, you can visit Osaka weather in January.
August and February present strikingly contrasting weather patterns. In August, temperatures soar with an average of 29°C (85°F), peaking at a sizzling 38°C (101°F), while humidity remains high at 91%. This month experiences substantial rainfall, with about 183 mm (7.2 in) over approximately 12 days. In contrast, February offers a much cooler climate, with average temperatures around 6°C (43°F) and maximum highs of just 20°C (68°F). Precipitation decreases significantly to 60 mm (2.3 in) across about 6 days, accompanied by lower humidity levels of 79%. For those curious about the specifics of February weather, they can explore more here: Osaka weather in February.
In August, the weather is characterized by high temperatures, ranging from a minimum of 19°C (66°F) to a maximum of 38°C (101°F), with an average of 29°C (85°F). The month experiences significant humidity at 91% and substantial rainfall of 183 mm (7.2 in) over approximately 12 days. In contrast, March presents a much colder climate, with temperatures varying from a chilly -1°C (31°F) to a maximum of 23°C (73°F), averaging just 10°C (51°F). Precipitation in March is lower at 109 mm (4.3 in) occurring over about 11 days, alongside a more comfortable humidity level of 74%. For more detailed insights into the conditions you can expect during March, you can refer to Osaka weather in March.
August and April present contrasting weather patterns. In August, temperatures soar, with averages around 29°C (85°F) and peaks reaching as high as 38°C (101°F), while April offers a milder climate, averaging 15°C (59°F) with a maximum of 26°C (79°F). Additionally, August experiences higher humidity levels at 91% and more precipitation over 12 days, totaling 183 mm (7.2 in), compared to April's 76% humidity and 135 mm (5.3 in) across 10 days. For more detailed insights about April weather, you can visit Osaka weather in April.
In comparing the weather between August and May, August is characterized by significantly warmer temperatures, with an average of 29°C (85°F) and maximums reaching up to 38°C (101°F). In contrast, May experiences milder weather, with an average temperature of 20°C (69°F) and daytime highs of 31°C (88°F). Additionally, August sees higher humidity levels at 91% and more frequent rainfall, accumulating 183 mm over 12 days, while May is slightly drier, with 150 mm of precipitation over 10 days. For a more detailed look at May weather, you can visit Osaka weather in May.
When comparing the weather in August and June, August generally experience hotter temperatures, with a minimum of 19°C (66°F) and an average of 29°C (85°F), peaking at a sweltering 38°C (101°F). In contrast, June sees cooler temperatures, with minimums around 14°C (58°F) and an average of 24°C (75°F), reaching a maximum of 32°C (89°F). Both months witness similar precipitation patterns, with 12 rainy days; however, August has more rainfall, totaling 183 mm (7.2 in), compared to June's 147 mm (5.8 in). Humidity is also slightly higher in August at 91%, compared to June's 87%. For more details on June's weather, you can check Osaka weather in June.
In comparing the weather between July and August, we see some notable differences. August experiences slightly warmer temperatures, with an average of 29°C (85°F) compared to July's 28°C (82°F), and maximum temperatures reaching up to 38°C (101°F), which is just 1°C higher than July's maximum. However, July sees more precipitation, with 282 mm (11.1 in) falling over 18 days, whereas August has 183 mm (7.2 in) over 12 days. Humidity levels remain high in both months, with August at 91% and July at 93%. For further details on July's weather patterns, you can refer to Osaka weather in July.
August and September exhibit notable differences in weather patterns. August tends to be warmer, with an average temperature of 29°C (85°F) and a maximum reaching up to 38°C (101°F), while September cools down slightly, averaging 25°C (78°F) and peaking at 37°C (99°F). In terms of precipitation, August experiences more rainfall, totaling 183 mm (7.2 in) over 12 days, compared to September's 169 mm (6.7 in) across 15 days. Despite September being a tad cooler, it maintains a relatively high humidity level of 87%, slightly lower than the 91% recorded in August. For more detailed information, visit Osaka weather in September.
August and October present quite contrasting weather patterns. In August, temperatures can reach a scorching maximum of 38°C (101°F), with an average of 29°C (85°F) and high humidity levels at 91%. The month also experiences significant rainfall, accumulating to 183 mm (7.2 in) over about 12 days. In contrast, October sees a cooler climate with temperatures peaking at 33°C (91°F) but averaging a more comfortable 20°C (67°F). While it is still relatively rainy, October records even higher precipitation at 230 mm (9.0 in) over the same number of rainy days. The humidity decreases slightly to 85%, making October feel more refreshing compared to the sweltering heat of August. For more specific details, check out Osaka weather in October.
August weather is characterized by high temperatures, ranging from a minimum of 19°C (66°F) to a scorching maximum of 38°C (101°F), with an average temperature of 29°C (85°F). This month also sees considerable precipitation, totaling 183 mm (7.2 in) over approximately 12 days, and high humidity levels at 91%. In stark contrast, November presents a much cooler climate, with temperatures dropping to a minimum of 2°C (35°F) and a maximum of 25°C (78°F), averaging at 13°C (56°F). Rainfall is significantly reduced in November, totaling just 44 mm (1.7 in) across 6 days, while humidity slightly decreases to 83%. For more details, you can check Osaka weather in November.
August and December present strikingly different weather conditions. In August, temperatures soar, with a minimum of 19°C (66°F) and an average high of 29°C (85°F), reaching extremes of up to 38°C (101°F). The month is also characterized by high humidity at 91% and significant rainfall, totaling 183 mm (7.2 in) over about 12 days. In contrast, December brings a sharp drop in temperature, with a minimum of -1°C (30°F) and a milder average high of 8°C (47°F), peaking at 22°C (71°F). Precipitation decreases considerably to 57 mm (2.2 in) across only 6 days, and humidity barely dips to 83%. For more details on what to expect in December, check out Osaka weather in December.
August in Osaka is characterized by oppressive heat and high humidity, setting it apart from the milder months of the year. With temperatures often climbing to a sweltering 38°C (101°F) and an average of 29°C (85°F), this month feels particularly intense. Adding to the discomfort, the humidity levels soar above 90%, making the air feel heavy and stifling. Rainfall is also frequent, with 12 days of precipitation contributing to a total of 183 mm (7.2 in), which can bring some brief relief but also adds to the overall stickiness of the season. For those planning a visit, understanding the unique August climate is essential; you can find more details by checking out Osaka Climate.