Last updated: October 30, 2025
Experience the vibrant summer climate of Jeju City, South Korea, in August, where temperatures soar with a maximum of 31°C (88°F) and an inviting average of 27°C (81°F). The island's beautiful landscapes are often embraced by a lush, humid atmosphere, with humidity levels reaching a remarkable 96%. Prepare for the occasional summer shower, as the region receives an average of 197 mm (7.7 in) of rainfall over 15 days. Whether you're exploring scenic coastlines or enjoying local culture, Jeju's August weather offers a unique blend of warmth and refreshing tropical rains.
In Jeju City, South Korea, August ushers in the summer's peak with comfortably warm temperatures, making it a prime time for outdoor activities and beach visits. During this month, the minimum temperature rises to a pleasant 22°C (72°F), while the average reaches 27°C (81°F), and highs can hit a scorching 31°C (88°F). This significant warmth follows a gradual increase from the cooler months of early summer, where temperatures transition from a mild 19°C (67°F) in July. As August progresses, the island feels the lingering heat of summer, which slowly ebbs into the cooler autumn months. This trend highlights Jeju's tropical climate, providing visitors with an ideal backdrop for exploring its stunning landscapes and vibrant culture.
August in Jeju City is characterized by significant rainfall, marking it as the month with the highest precipitation at 197 mm (7.7 in). This heavy downpour occurs over 15 days, indicating a pattern of frequent rain that peaks during the summer season. Following July’s 170 mm (6.7 in), August continues the trend of elevated rainfall, as clouds and monsoonal influences dominate the region. The shift from July to August not only underscores a heightened dampness but also sets the stage for a remarkable increase in September, which receives the most rain of the year at 298 mm (11.7 in). Overall, the months leading up to autumn in Jeju City highlight a clear trend of rising precipitation, with a growing rhythm that reflects the island’s lush, tropical character during peak summer.
In August, Jeju City experiences a notably high humidity level of 96%, marking a slight decline from the peak 98% reached in July. This month continues the trend of summer's oppressive moisture, where humidity levels consistently hover above 90% from June through August. Following this hazy summer peak, September brings a more comfortable 84% humidity, signaling a gradual transition into the drier autumn months. Overall, the pattern reflects Jeju's humid subtropical climate, characterized by significant moisture during the summer, which dips into more moderate levels as the year progresses.
In August, Jeju City experiences incredibly high UV levels with an UV Index of 12, classified as extreme, which reduces the safe exposure time to just 10 minutes. This trend follows a summer peak that begins in June and July, when the UV Index also reaches 12. As we progress through the year, it's clear that spring and summer months bring significant increases in UV radiation—jumping from a mild 4 in January to an alarming 10 or higher by May and lasting through August. As the year moves towards autumn, the UV Index begins to taper off, settling at a still noteworthy 10 in September. For those planning outdoor activities during these intense summer months, proper sun protection is essential. For more detailed information, visit Jeju City UV Index.
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In Jeju City, South Korea, August shines as a beacon of sunlight, boasting an impressive 318 hours of sunshine. This peak month follows a gradual increase in daylight hours, starting from the cold grip of January with just 166 hours. As spring emerges, the sunshine steadily climbs, reaching 304 hours in May, before maintaining a strong presence throughout the summer months of June and July. The summer's warmth continues to embrace the island, but as August transitions into September, the sun begins to retreat, dropping to 266 hours. This pattern illustrates a delightful seasonal transition, highlighting Jeju City’s vibrant summer allure and the promise of lengthening days ahead.
In August, Jeju City enjoys a 33% chance of sunny weather, maintaining a trend seen throughout the summer months, which tend to be cloudier than other times of the year. Following a dip in July, where the likelihood of sunshine falls to 24%, August reflects a slight rebound, aligning with the early summer months that generally hover around the low to mid-30s percentage range. While August does not boast the sunniest days compared to later months in the year, such as October with its impressive 56%, it still provides a fair opportunity for beachgoers and tourists to soak in some rays amid summer's warmth. Ultimately, while the chance of sunshine may not peak, Jeju City's August offers a delightful blend of summer vitality and sporadic sunny spells.
In August, Jeju City experiences a delightful blend of summer warmth and extended daylight, with approximately 13 hours of sunlight illuminating beautiful landscapes and vibrant activities. As the peak of summer winds down, the daylight duration begins to gradually decrease, following a trend established earlier in the season, where June and July boast the longest days of the year at 14 hours each. The transition from the brightness of summer to the shorter days of fall becomes evident in September, when daylight dips to 12 hours. This gradual ebb of sunlight perfectly complements Jeju's rich natural beauty, encouraging visitors to savor the lingering warmth before the days grow shorter into autumn.
August in Jeju City, South Korea, offers a gentle breeze with an average wind speed of 3.9 m/s (9 mph), marking one of the calmer months of the year. As summer reaches its peak, the winds soften, creating a tranquil atmosphere perfect for beach outings and nature exploration. This significant drop from the 6.5 m/s (14 mph) winds of January and February highlights a clear trend: wind speeds descending progressively towards the mid-year months, with a low in June. As the season transitions into fall, wind speeds pick up again in September, underscoring the dynamic climate of Jeju. Enjoying the soothing August winds is a delightful way to experience the island's serene beauty before the breezier months arrive.
Weather in Jeju City varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Jeju City, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January in Jeju City showcase stark contrasts in weather. August boasts warm temperatures, averaging 27°C (81°F) with highs reaching 31°C (88°F), accompanied by high humidity at 96% and substantial rainfall of 197 mm (7.7 in) across 15 days. In contrast, January experiences much cooler conditions, with average temperatures around 6°C (44°F), peaking at 19°C (66°F) and dipping to lows of -2°C (29°F). Precipitation is also less frequent in January, averaging just 58 mm (2.3 in) over 10 days. For more detailed insights, visit Jeju City weather in January.
August and February present stark contrasts in weather. In August, temperatures soar with a minimum of 22°C (72°F), reaching an average of 27°C (81°F) and peaking at 31°C (88°F). This month is characterized by high humidity at 96% and significant rainfall, with 197 mm (7.7 in) spread over 15 days. In contrast, February experiences much cooler conditions, with temperatures ranging from a minimum of -1°C (31°F) to a maximum of 17°C (63°F), averaging just 7°C (44°F). The precipitation is also markedly lower, with 59 mm (2.3 in) falling over 9 days, accompanied by a humidity level of 70%. For more details on February weather, visit Jeju City weather in February.
The weather in August and March presents a striking contrast. August boasts warm temperatures, with a minimum of 22°C (72°F) and an average of 27°C (81°F), peaking at 31°C (88°F). This month is quite humid, with a staggering humidity level of 96% and significant rainfall totaling 197 mm (7.7 in) over about 15 days. In contrast, March is much cooler, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 18°C (65°F) and an average of only 10°C (51°F). Despite having fewer rainy days at 11, March still receives a decent amount of precipitation at 101 mm (4.0 in) and has lower humidity at 73%. For more detailed insights on this month's weather, you can visit Jeju City weather in March.
When comparing the weather in August and April, it's evident that August is significantly warmer and wetter. August boasts an average temperature of 27°C (81°F), with maximums reaching 31°C (88°F), while April's temperatures are much cooler, averaging only 13°C (57°F) and peaking at 20°C (69°F). Additionally, April experiences much less precipitation, with only 91 mm (3.6 in) over 7 days, compared to August’s 197 mm (7.7 in) spread over 15 days, leading to a much higher humidity level of 96% in August versus 83% in April. For a closer look at April's climate specifics, visit Jeju City weather in April.
In comparing the weather between August and May, August stands out as significantly warmer and more humid. With average temperatures soaring to 27°C (81°F) and highs reaching up to 31°C (88°F), August experiences a steamy climate contrasted by May's cooler temps, averaging 17°C (63°F) with maximums of only 24°C (75°F). Additionally, August sees nearly double the precipitation, totaling 197 mm (7.7 in) over 15 days, compared to May’s 92 mm (3.6 in) over 9 days. Humidity also peaks in August at 96%, overtaking May's 89%. For a closer look at May weather in Jeju, check out Jeju City weather in May.
In comparing the weather between June and August, it's clear that August boasts warmer temperatures, with average highs reaching 31°C (88°F) compared to June's maximum of 26°C (79°F). Additionally, August experiences higher humidity levels at 96%, compared to June's 93%. Rainfall also increases significantly in August, with 197 mm (7.7 in) recorded over 15 days, while June sees less precipitation at 141 mm (5.6 in) over 10 days. This makes August feel more sultry and rainy overall. For those interested in more details about June's weather, you can visit Jeju City weather in June.
In comparing the weather of August and July, we see that August tends to be slightly warmer, with an average temperature of 27°C (81°F) compared to July's 25°C (77°F). Both months share a maximum temperature of 31°C (88°F), but August experiences more rainfall, totaling 197 mm (7.7 in) over 15 days, whereas July has 170 mm (6.7 in) across 14 days. Humidity levels are also notably high in both months, with August at 96% and July at 98%. For more detailed insights, visit Jeju City weather in July.
August typically experiences warmer temperatures compared to September, with average highs reaching 31°C (88°F) versus September's maximum of 28°C (83°F). While both months see similar precipitation days at 15, September tends to be wetter overall, receiving 298 mm (11.7 in) of rain compared to August's 197 mm (7.7 in). Additionally, the humidity is higher in August at 96%, whereas September's humidity drops to a more comfortable 84%. For more detailed insights on September weather patterns, you can check Jeju City weather in September.
The weather in August is significantly warmer and more humid than in October, with average temperatures soaring to 27°C (81°F) and humidity levels reaching 96%. In contrast, October brings a refreshing chill, where temperatures range from a minimum of 11°C (53°F) to an average of 19°C (66°F), making it ideal for outdoor activities. Additionally, October experiences less precipitation, with only 109 mm (4.3 in) over about 9 days, compared to August's 197 mm (7.7 in) and 15 days of rain. For a closer look at the weather specifics, visit Jeju City weather in October.
August and November present markedly different weather conditions. In August, temperatures range from a minimum of 22°C (72°F) to a maximum of 31°C (88°F), with an average of 27°C (81°F), creating a hot and humid atmosphere marked by high humidity levels of 96%. Furthermore, August experiences significant rainfall, with 197 mm (7.7 in) over about 15 days. In contrast, November sees much cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 22°C (71°F), averaging only 14°C (57°F). Rainfall drops dramatically to 46 mm (1.8 in) spread over just 7 days, and humidity decreases to 73%. For more detailed information, you can refer to Jeju City weather in November.
August and December showcase strikingly contrasting weather patterns. In August, temperatures soar with a minimum of 22°C (72°F) and an average of 27°C (81°F), reaching up to 31°C (88°F). The month is characterized by high humidity at 96% and significant rainfall, totaling 197 mm (7.7 in) over 15 days. In stark contrast, December experiences much cooler conditions, with a minimum of 0°C (33°F), an average of 9°C (48°F), and a maximum of 20°C (68°F). Precipitation decreases significantly to 61 mm (2.4 in) spread over just 10 days, and humidity drops to 71%. For more details on December weather, visit Jeju City weather in December.
August in Jeju City is marked by warm temperatures and high humidity, setting it apart from other months of the year. With an average temperature hovering around 27°C (81°F), the warmth can be quite intense, especially as the maximum can peak at 31°C (88°F). However, it also brings a significant amount of rainfall, contributing to 15 days of precipitation and a hefty total of 197 mm (7.7 in) for the month. This moist atmosphere can create lush landscapes but also means that visitors should be prepared for bouts of rain. Overall, August's combination of heat and humidity makes it distinctively vibrant yet challenging when exploring the natural beauty of Jeju. For a deeper understanding of the island's weather patterns throughout the year, check out Jeju City Climate.