Jeju Weather in August
South Korea · 30-year monthly averages
⚠️ Challenging time to visit
August in Jeju is hot, with average daytime highs around 30°C (86°F) and nighttime lows near 25°C (77°F). Expect roughly 272mm of precipitation spread over about 10 rainy days, and heavy rainfall is common — this is peak wet season territory.
Avg high
30°C
86°F
Avg low
25°C
77°F
Rainfall
272mm
very wet
Rainy days
10
days with ≥1mm
☀️ About 195 hours of sunshine over the month (~7h/day).
🎒 What to pack
- breathable summer clothing
- sunscreen, hat and sunglasses
- refillable water bottle
- compact umbrella or rain jacket
August vs the rest of the year
FAQ
- How hot is Jeju in August?
- August in Jeju is hot, with average daytime highs around 30°C (86°F) and nighttime lows near 25°C (77°F). Expect roughly 272mm of precipitation spread over about 10 rainy days, and heavy rainfall is common — this is peak wet season territory.
- Does it rain a lot in Jeju in August?
- Jeju sees around 272mm of precipitation in August on average — very wet by global standards.
- Is August a good time to visit Jeju?
- August is a challenging month to visit Jeju weather-wise — plan around the conditions.