WanderWhen

Seoul weather in August

August is a fair shoulder-season month in Seoul — decent conditions with some trade-offs. Expect highs around 29°C, lows near 23°C, and about 18.2 days with rain.

5.1 · Fairtravel score for August
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg high
29°C
Avg low
23°C
Rainfall
324 mm
Rain days
18.2
Sunshine
8.9 h/day
Daylight
13.4 h

What to pack for Seoul in August

  • light, breathable clothing
  • sun protection (hat, SPF 50)
  • a compact umbrella or rain shell — rain is frequent
  • expect humid, sticky conditions

Humidity averages 83%; max daily wind around 15 km/h.

How August compares

January: 1.8/10 JFebruary: 3.3/10 FMarch: 6.6/10 MApril: 9.8/10 AMay: 9.6/10 MJune: 8.9/10 JJuly: 5.2/10 JAugust: 5.1/10 ASeptember: 8.8/10 SOctober: 9.8/10 ONovember: 6.2/10 NDecember: 2.0/10 D

Best months in Seoul: April–May & October. See the full best time to visit Seoul guide.

Seoul in August: the details

In August, Seoul sees average daytime highs of 29°C (84°F) and overnight lows of 23°C (73°F). Rainfall totals roughly 324 mm across 18.2 rainy days, and the sun shines about 8.9 hours per day with 13.4 hours of daylight mid-month. Relative humidity averages 83%.

These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Seoul, South Korea (37.57, 126.98) — see our methodology. Actual conditions vary year to year.

Where should you go next month?

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