Jeju Weather in August
August in Jeju averages 29°C (84°F) during the day and 25°C (77°F) at night. August is part of the rainy season, with around 175 mm (6.9 in) of rainfall and frequent showers.
Rainfall in Jeju in August
As part of the rainy season, Jeju sees around 13 days of rain in August, with an average of 175 mm (6.9 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.
Temperature in Jeju in August
If you're visiting Jeju in August, expect highs of 29°C (84°F) and overnight lows around 25°C (77°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights stay warm at around 25°C (77°F), so light bedding and good ventilation are worth thinking about. This is typically the warmest month of the year, so light summer clothing is a good idea.
Sunshine in Jeju in August
There are approximately 193 hours of sunshine this month, despite being the rainy season. Rain often arrives in the late afternoon or evening, keeping mornings and early afternoons sunny. Even during the wet season, it could still be a nice time to visit.Should you favor a climate that's both dry and comfortably warm, October typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Jeju's climate page.
Jeju Temperature in August
Min Temperature
25°C (77°F)
Max Temperature
29°C (84°F)
Chance of Rain
42%
Precipitation
175 mm (6.9 in)
Rainy days
13 days
Humidity
76%
Sunshine
193 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Jeju typically stay consistent throughout August, with daily highs averaging around 29°C (84°F). Nights are warm, with lows typically ranging from 23°C (73°F) to 25°C (77°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Jeju in August
Browse day-by-day weather records for Jeju spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Jeju historical weather extremes in August
Based on weather observations in Jeju between 1976 and 2025, these are the recorded extremes during August.
- The warmest day in August was on August 11, 1998, with a maximum of 37°C (99°F).
- Jeju experienced its chilliest August day on August 19, 1993, reaching only 21°C (70°F).
- Nighttime temperatures dropped to 17°C (63°F) on August 29, 1979, marking the coldest August night on record.
Best Places in South Korea in August
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in August →
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What to Wear in Jeju in August
Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Jeju in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Jeju's climate page.
Temperature Rainfall Sunshine Humidity
See the full Jeju climate overview or explore weather in South Korea.
