Last updated: October 30, 2025
Experience the sweltering summer of Osan, South Korea, where temperatures can soar to a maximum of 38°C (101°F) and maintain an average of 27°C (80°F). With a refreshing low of 16°C (61°F), the evenings offer some respite. However, be prepared for the 251 mm (10.1 in) of rain that falls across 14 days of the month in this humid climate, marked by a staggering 91% humidity. This weather creates a vibrant backdrop for summer activities, but also calls for careful planning to enjoy everything Osan has to offer while staying cool and dry.
In August, Osan, South Korea experiences its warmest temperatures of the year, reflecting the peak of summer. With minimums averaging around 16°C (61°F) and maximums soaring to a sizzling 38°C (101°F), the month showcases a significant rise from earlier summer temperatures. The average temperature of 27°C (80°F) offers a blend of heat and humidity, creating a lively atmosphere perfect for outdoor activities and cultural events. As summer wanes, the transition to cooler September weather can already be felt, but August remains a bold testament to the city's warm, vibrant climate.
August in Osan, South Korea, marks the peak of the monsoon season, delivering a substantial 255 mm (10.1 in) of precipitation over 14 days. This surge in rainfall follows an already significant July, which recorded 235 mm (9.3 in), reflecting a distinct mid-summer trend of increased moisture. In contrast to the relatively dry winter months, where precipitation barely exceeds 23 mm (0.9 in), the late summer sees an evident spike as the rainy season intensifies. The consistent pattern of heavy rainfall during these summer months suggests a seasonal rhythm that shapes both the climate and landscape, creating lush surroundings that stand in sharp contrast to the sparse, frosty conditions of January.
In Osan, South Korea, the month of August stands out for its remarkably high humidity, which reaches 91%, mirroring the peak levels recorded in July. This pattern marks the culmination of a gradual rise in humidity from the cooler months, where January starts at a more comfortable 71%. As spring gives way to summer, humidity levels soar, with May and June seeing significant increases to 81% and 85%, respectively. By the time August arrives, residents experience a sticky tropical atmosphere, providing a stark contrast to the drier autumn months ahead, such as September and October, which see a noticeable drop to 77% and 79%. This transition not only underscores the seasonal shift but also prepares the region for the comfortable yet humid fall that follows.
In August, Osan, South Korea, experiences a peak in its UV Index, reaching an intense 11, which falls into the extreme exposure category. This underscores the necessity for sun protection, as the recommended burn time plummets to just 10 minutes. Following the pattern from July, where the UV Index also hit 11, it’s evident that summer months pose significant risk for skin damage if precautions aren’t taken. This trend of increasing UV exposure begins subtly in March at a moderate level of 6, then escalates sharply through the spring into the summer months, peaking in mid-summer before tapering off in September. It's crucial for residents and visitors to stay informed about the daily UV levels to ensure their safety. For more detailed information, check the Osan UV Index.
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In Osan, South Korea, August shines as a peak of summer brightness, collecting an impressive 290 hours of sunshine. This month follows a streak of sunny days from May to June, where the sun graced the city for over 300 hours, contributing to the vibrant energy of the season. Although August sees a slight dip from July's 293 hours, it still maintains a remarkable luminosity, echoing the warmth and vitality of summer. As the year progresses towards autumn, sunshine hours begin to decline gently, with September recording 261 hours, yet August remains a standout, celebrating the sun's generous embrace before the seasons shift.
In Osan, South Korea, the likelihood of sunny weather in August trends on the lower side, with only a 31% chance of sunshine. This marks a noticeable decline from the sunnier winter months, where the chance peaks at 63% in December and remains robust through the early part of the year. As spring transitions into summer, the chances of sunny days dip further, culminating in the 30% chance seen in July, before slightly improving in the following months of September and October. The overall pattern suggests that while August may not be the sunniest month, it offers a glimpse of the brighter days ahead as the seasons change.
In Osan, South Korea, August marks a transition in daylight duration as the summer reaches its peak. With approximately 13 hours of daylight, the city enjoys a vibrant atmosphere, although this amount is slightly reduced from the continuous 14 hours experienced during the preceding summer months of June and July. As the year progresses, daylight begins to wane in September, tapering off to 12 hours. This trend highlights the gradual shift from the long, sun-filled days of summer towards the shorter, cozier days of autumn. Overall, August presents a lovely balance, allowing residents and visitors to relish the remaining warmth and light of the season before the days start to shorten significantly.
In Osan, South Korea, the average wind speed exhibits a gentle rhythm throughout the year, with August typically experiencing a moderate breeze of 2.3 m/s (5 mph). This soft wind flows in softly after the sultry summer months, where July sees the lowest average at 2.0 m/s (4 mph). As the temperatures rise, the overall wind seems to calm down, creating a warm, tranquil atmosphere. The trend doesn't sharply change in the subsequent months, with September and October showing slight increases to 2.7 m/s (6 mph) and 2.4 m/s (5 mph), respectively. Notably, winter months bring a revival in wind speeds, nudging back to 3.1 m/s (7 mph) in January, providing a refreshing contrast to the summer lull. Overall, the wind in Osan serves as a subtle backdrop to its seasonal changes, harmonizing with the ebb and flow of nature throughout the year.
Weather in Osan varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Osan, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present stark contrasts in weather conditions. In August, temperatures range from a minimum of 16°C (61°F) to a sweltering maximum of 38°C (101°F), with an average of 27°C (80°F). The month is characterized by high humidity at 91%, accompanied by significant precipitation of 255 mm (10.1 in) over approximately 14 days. In sharp contrast, January experiences frigid temperatures, with a minimum of -17°C (2°F) and a maximum of 13°C (55°F), resulting in an average of -2°C (29°F). Precipitation during January is minimal at just 21 mm (0.8 in) over only 2 days, and the humidity is noticeably lower at 71%. For more details on January weather, visit Osan weather in January.
August and February present stark contrasts in weather patterns. In August, temperatures soar with a minimum of 16°C (61°F), an average of 27°C (80°F), and can reach as high as 38°C (101°F), accompanied by high humidity levels of 91%. Precipitation is significant during this month, with 255 mm (10.1 in) falling over 14 days. In contrast, February brings much colder conditions, with temperatures ranging from a frigid minimum of -15°C (4°F) to a maximum of only 18°C (65°F) and an average of 0°C (33°F). The month is notably drier, with just 23 mm (0.9 in) of precipitation occurring over 4 days and a lower humidity of 65%. For more detailed information, visit Osan weather in February.
August and March present contrasting weather conditions. In August, temperatures can soar from a minimum of 16°C (61°F) to an average of 27°C (80°F) and even reach a maximum of 38°C (101°F). This month is characterized by high humidity levels at 91% and significant rainfall, with about 255 mm (10.1 in) of precipitation over 14 days. In contrast, March experiences much cooler temperatures, ranging from a low of -6°C (21°F) to an average of 7°C (44°F), peaking at a maximum of 21°C (70°F). The precipitation is far less, averaging 47 mm (1.9 in) over just 5 days, and humidity levels are lower at 65%. For more detailed information, you can check Osan weather in March.
When comparing the weather between August and April, notable contrasts emerge. August offers a warm climate with temperatures ranging from a mild 16°C (61°F) to a scorching 38°C (101°F), accompanied by high humidity levels at 91%. Rainfall is quite significant during this month, totaling 255 mm (10.1 in) over approximately 14 days. In contrast, April experiences much cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 28°C (82°F), averaging around 12°C (54°F). This month sees significantly less precipitation, with only 54 mm (2.1 in) falling over about 5 days, combined with a lower humidity level of 75%. For more specific details about April weather, you can visit Osan weather in April.
August and May present quite distinct weather patterns. In August, temperatures soar with a minimum of 16°C (61°F) and an average peak of 27°C (80°F), reaching as high as 38°C (101°F). The month is characterized by high humidity at 91% and significant rainfall, totaling 255 mm (10.1 in) over 14 days. In contrast, May offers a milder climate with temperatures ranging from a minimum of 6°C (42°F) to a comfortable average of 18°C (64°F), peaking at 31°C (89°F). Precipitation is notably lower in May, totaling 98 mm (3.9 in) over 8 days, and humidity is slightly less at 81%. For more specifics on the weather conditions for this month, check out Osan weather in May.
In comparing the weather between June and August, August stands out as the warmer and more humid month. Average temperatures soar in August, with minimums of 16°C (61°F) and maximums reaching up to 38°C (101°F), contrasting sharply with June's cooler temperatures, which range from a minimum of 12°C (53°F) to a maximum of 33°C (91°F). Precipitation is also significantly higher in August, with 255 mm (10.1 in) of rain over 14 days, compared to June's 80 mm (3.1 in) spread across just 7 days. Additionally, the humidity rises in August to an average of 91%, slightly elevated from June’s 85%. For a more detailed look at June weather patterns, you can visit Osan weather in June.
In comparing the weather between July and August, we see some notable differences. August tends to be slightly warmer, with average temperatures reaching 27°C (80°F) compared to July's 26°C (79°F). The maximum temperature also peaks higher in August at 38°C (101°F), while July's highest temperature is 36°C (98°F). Additionally, August experiences more precipitation, with a total of 255 mm (10.1 in) over 14 days, versus July's 235 mm (9.3 in) during the same number of days. Both months share the same humidity level of 91%, making them equally muggy. For more detailed insights, you can check Osan weather in July.
August weather tends to be much warmer and more humid than September, with temperatures ranging from a minimum of 16°C (61°F) to a scorching maximum of 38°C (101°F) and an average of 27°C (80°F). This month also sees significant rainfall, with approximately 255 mm (10.1 in) of precipitation over 14 days and high humidity levels at 91%. In contrast, September brings a noticeable drop in temperature, with a minimum of 9°C (48°F), an average of 22°C (71°F), and a maximum of 31°C (88°F). The month is drier, with only 136 mm (5.4 in) of precipitation occurring over 9 days and lower humidity at 77%. For more details about September's weather, you can check Osan weather in September.
In comparing the weather between August and October, there's a significant shift in both temperature and precipitation. August boasts a minimum temperature of 16°C (61°F) and can reach up to 38°C (101°F) during hot spells, averaging a warm 27°C (80°F). However, this month is also marked by high humidity at 91% and considerable rainfall, totaling 255 mm (10.1 in) over 14 days. In stark contrast, October experiences much cooler temperatures, with a minimum of just 1°C (33°F) and a maximum of 29°C (84°F), culminating in an average of 15°C (59°F). With only 62 mm (2.5 in) of precipitation over just 5 days and lower humidity at 79%, October offers a much drier and cooler climate. For more information, you can check Osan weather in October.
August and November exhibit strikingly different weather patterns. August is characterized by warm temperatures, with daily averages around 27°C (80°F) and maximums soaring to 38°C (101°F), accompanied by high humidity levels of 91%. This month also sees significant rainfall, with approximately 255 mm (10.1 in) of precipitation over 14 days. In contrast, November experiences a sharp drop in temperature, with averages plummeting to 8°C (46°F) and minimums reaching as low as -5°C (23°F). The precipitation significantly decreases to 54 mm (2.1 in) across just 5 days, paired with a lower humidity of 80%. For more details on the weather in November, visit Osan weather in November.
August and December present strikingly different weather patterns. In August, temperatures soar with an average of 27°C (80°F), reaching a maximum of 38°C (101°F) and accompanied by high humidity at 91%. The month sees significant precipitation, totaling 255 mm (10.1 in) over about 14 days, creating a muggy atmosphere. In contrast, December is marked by frigid conditions, with an average temperature of 0°C (33°F) and lows plummeting to -14°C (8°F). Precipitation is minimal, totaling just 26 mm (1.0 in) across 5 days, and humidity drops to 74%. These seasonal extremes highlight the dramatic shifts in climate experienced between these two months. For more specific details on December weather in Osan, you can visit Osan weather in December.
August in Osan brings the peak of summer, characterized by high temperatures and frequent rainfall, making it stand out from other months. With an average temperature of around 27°C (80°F), the days can get quite hot, occasionally soaring to a maximum of 38°C (101°F). The welcome coolness of the evenings contrasts sharply with the daytime heat, providing a brief respite as temperatures dip to 16°C (61°F). This month is also notably humid, with levels reaching up to 91%, creating a sticky atmosphere that often precedes afternoon thunderstorms. The 14 days of precipitation, contributing to a total of 255 mm (10.1 in), underscores August's reputation as one of the wetter months in Osan. For a deeper look into Osan's climate patterns, check out Osan Climate.