Verdict: Good month
Seoul Weather in August
August runs warm in Seoul, with daily highs around 29°C (84°F) and nights near 23°C (73°F). It's also the wet side of the calendar: rain falls on about 19 days, so build flexibility into plans. Overall, August is a solid month to visit Seoul.
Average high
29°C / 84°F
Average low
23°C / 73°F
Rain days
~19
Precipitation
358 mm
What to pack for Seoul in August
- Summer clothes, plus one light layer for air-con and evenings
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Rain gear is non-negotiable — expect rain on roughly 19 days
- Quick-dry shoes — downpours are short but heavy
- Comfortable walking shoes — every guide on this site assumes you'll use them
August against the rest of the year
Warmest in Seoul: Jul (29°C / 84°F) · Coolest: Jan (2°C / 36°F) · Wettest: Jul (~20 rain days)
2°
-7°
Jan
6°
-4°
Feb
12°
0°
Mar
18°
7°
Apr
22°
12°
May
27°
18°
Jun
29°
22°
Jul
29°
23°
Aug
26°
18°
Sep
18°
9°
Oct
12°
2°
Nov
3°
-6°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)