Seoul Weather in August
In August, Seoul averages a high of 30°C (85°F) and a low of 23°C (73°F), from 49 years of daily records (1971–2026).
30°C
Average high
85°F
23°C
Average low
73°F
37°C
Record high
99°F · August 9, 1994
12°C
Record low
53°F · August 18, 2004
What August Is Like in Seoul
- August 2026 was the 2nd warmest August in 49 years of records, 2.2°C (4.0°F) above the long-run average.
- August in Seoul has become 1.7°C (3.1°F) warmer on average: the 2012–2026 average against 1970–1989.
- 5 of the 10 warmest Augusts on record in Seoul have come since 2012.
- The August heat record, 37°C (99°F) on August 9, 1994, has stood for 32 years.
At least 1 mm of rain falls on 43% of August days, and the month averages 331 mm in total.
Warmest: 2016 (32.6°C)Latest: 2026 (31.1°C)10-year averageLong-run average (29.6°C)
Look Up a Day in August
See the weather in Seoul on any August date, year by year.
Source: NOAA GHCN-Daily, Seoul City (1973–2025); Incheon (1971–2026). Averages cover 1971–2026. How we compute this