What August feels like in Seoul
Late summer arrives in Seoul with August. The midday hours are hot; shade and water matter on long walks. The gap between afternoon and night is small, so nights stay warm and the temperature hardly changes after dark. High humidity makes the heat feel heavier and sticky, especially on still afternoons.
Rain in Seoul in August
Rain is part of normal life this month, falling on about every other day. When rain comes it is heavy, about 16.1 mm (0.6 in) per wet day, often in short, strong bursts. That is heavier than Seoul's usual 12.8 mm per rainy day across the year. It is among the three wettest months of the year.
Daylight and sunshine in August
In mid-August, sunrise is at about 5:47 am and sunset at about 7:27 pm (local time) — 13 h 39 min of daylight. Compared with mid-July, the day has lost 53 min. Measured sunshine covers about 65% of the daylight — there are plenty of bright spells.
How August compares to the rest of the year
Ranked by average high, August comes out as the warmest month in Seoul. Afternoons run 0.6°C (1.1°F) warmer than in July, with 86 mm less rain. Temperatures keep falling into September. September averages a high of 25.1°C (77.2°F).
Who August suits
- Sightseeing: less ideal — rain falls on more than half the days.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Museums & indoor: a good choice — with rain on most days, galleries and museums make easy plans.
Tips for visiting Seoul in August
Rain Protection
A compact umbrella and a light waterproof jacket.
Sun Protection
Loose, breathable clothing plus sunscreen and a wide-brimmed hat.
Quick questions
How warm is Seoul in August?
Expect around 29.1°C (84.4°F) in the afternoon and 22.4°C (72.3°F) at night, which most visitors would call hot.
Does it rain a lot in Seoul in August?
It does: about 16 rainy days bring roughly 257 mm, so plan some indoor options.
What should I wear in Seoul in August?
The numbers point to rain protection and sun protection. Evenings feel similar to the day, so the same clothes work from morning to night.
Is August or September better for visiting Seoul?
September, clearly: it ranks #3 of 12 among Seoul's months, against #11 for the other. September is cooler and has fewer rainy days.