August is one of the warmer months of the year in Korea, with average highs near 31.4°C and lows around 21.9°C (mean 26.7°C). It is a relatively wet time of year, averaging 333 mm of rainfall and 88% relative humidity across the period.
August is one of the warmer months of the year in Korea. Across 45 years of records, the warmest August in Korea was 2009 — when the month averaged 28.4°C — while the coldest was 1997 at 25.8°C. Typical August days reach 31.4°C with nights near 21.9°C. The long-term August temperature trend is broadly flat.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.6°C | 26.4°C | 27.1°C | 26.6°C | 26.6°C | 0°C |
| Avg High | 31.5°C | 31.1°C | 31.9°C | 31.2°C | 31.2°C | -0.3°C |
| Avg Low | 21.7°C | 21.8°C | 22.2°C | 21.9°C | 21.9°C | +0.2°C |
| Avg Rain | 314 mm | 355 mm | 294 mm | 349 mm | 363 mm | +49 mm |
August temperatures in Korea have stayed relatively stable across the record.
August has ranged from a record low of 20.9°C (1992) to a record high of 34.4°C (2009).
Rainfall in August is a relatively wet time of year, averaging 333 mm, with a wettest year of 502 mm.
A quieter season to visit Korea
If your dates are flexible, the more temperate months of February and October tend to be the most comfortable for visiting Korea. That said, August — with days averaging 31.4°C and nights around 21.9°C (mean 26.7°C) and higher rainfall (333 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 30.7°C | 21.7°C | 26.2°C | 296 mm | 89% | 2 m/s | 4 |
| 2024 🌧️ | 31.5°C | 22.6°C | 27.1°C | 502 mm | 89% | 1.9 m/s | 3.6 |
| 2023 | 30.9°C | 21.3°C | 26.1°C | 335 mm | 88% | 2.4 m/s | 3.7 |
| 2022 | 31.4°C | 21.7°C | 26.5°C | 407 mm | 88% | 2.1 m/s | 3.8 |
| 2021 | 31.4°C | 21.7°C | 26.6°C | 235 mm | 88% | 2.1 m/s | 4.2 |
| 2020 | 31.5°C | 22.6°C | 27.0°C | 402 mm | 89% | 2.4 m/s | 4 |
| 2019 | 30.9°C | 22.6°C | 26.7°C | 392 mm | 88% | 2 m/s | 3.8 |
| 2018 | 31.6°C | 22.5°C | 27.0°C | 303 mm | 89% | 2.5 m/s | 3.5 |
| 2017 | 31.3°C | 21.5°C | 26.4°C | 274 mm | 89% | 2 m/s | 4.1 |
| 2016 | 31.0°C | 21.1°C | 26.1°C | 415 mm | 89% | 2.2 m/s | 3.8 |
| 2015 | 31.8°C | 21.3°C | 26.6°C | 300 mm | 88% | 2.3 m/s | 4.6 |
| 2014 | 31.3°C | 21.8°C | 26.6°C | 339 mm | 88% | 2.1 m/s | 4.4 |
| 2013 | 30.1°C | 22.1°C | 26.1°C | 402 mm | 89% | 1.8 m/s | 4.1 |
| 2012 | 30.5°C | 22.1°C | 26.3°C | 423 mm | 89% | 2.1 m/s | 4.2 |
| 2011 | 31.8°C | 22.1°C | 26.9°C | 403 mm | 89% | 2 m/s | 4.1 |
| 2010 | 31.9°C | 21.6°C | 26.8°C | 243 mm | 86% | 1.7 m/s | 4.8 |
| 2009 🔥 | 34.4°C | 22.4°C | 28.4°C | 293 mm | 85% | 2 m/s | 4.5 |
| 2008 | 31.4°C | 22.1°C | 26.7°C | 239 mm | 89% | 2.1 m/s | 4.5 |
| 2007 | 30.9°C | 22.2°C | 26.5°C | 217 mm | 88% | 2 m/s | 4 |
| 2006 | 31.1°C | 21.8°C | 26.5°C | 285 mm | 89% | 2.8 m/s | 3.8 |
| 2005 | 31.5°C | 22.1°C | 26.8°C | 304 mm | 87% | 2 m/s | 4.5 |
| 2004 | 31.1°C | 22.4°C | 26.7°C | 363 mm | 90% | 2.2 m/s | 4.3 |
| 2003 | 32.1°C | 22.6°C | 27.4°C | 346 mm | 88% | 2.3 m/s | 4 |
| 2002 | 33.4°C | 21.8°C | 27.6°C | 355 mm | 86% | 2.1 m/s | 4.1 |
| 2001 | 30.6°C | 22.1°C | 26.4°C | 448 mm | 90% | 2.1 m/s | 4.8 |
| 2000 | 32.9°C | 22.3°C | 27.6°C | 90 mm | 84% | 2.2 m/s | 4.8 |
| 1999 | 31.1°C | 22.1°C | 26.6°C | 396 mm | 89% | 2.3 m/s | 4 |
| 1998 | 31.8°C | 22.3°C | 27.0°C | 220 mm | 88% | 1.9 m/s | 4.4 |
| 1997 ❄️ | 30.3°C | 21.4°C | 25.8°C | 450 mm | 90% | 2.9 m/s | 4 |
| 1996 | 30.7°C | 21.8°C | 26.2°C | 393 mm | 90% | 2.1 m/s | 3.8 |
| 1995 | 30.8°C | 21.8°C | 26.3°C | 387 mm | 89% | 2.1 m/s | 4.1 |
| 1994 | 30.4°C | 21.7°C | 26.1°C | 328 mm | 90% | 2.4 m/s | 3.9 |
| 1993 | 31.8°C | 22.0°C | 26.9°C | 283 mm | 86% | 2.2 m/s | 4.1 |
| 1992 | 31.7°C | 20.9°C | 26.3°C | 335 mm | 87% | 1.9 m/s | 4.2 |
| 1991 | 30.9°C | 21.6°C | 26.3°C | 493 mm | 90% | 2.5 m/s | 3.2 |
| 1990 | 31.1°C | 22.0°C | 26.5°C | 263 mm | 88% | 2.3 m/s | 4.5 |
| 1989 | 31.7°C | 22.2°C | 26.9°C | 331 mm | 88% | 2.2 m/s | 4.6 |
| 1988 | 31.8°C | 21.9°C | 26.9°C | 252 mm | 88% | 1.9 m/s | 4.2 |
| 1987 | 33.5°C | 21.9°C | 27.7°C | 219 mm | 85% | 2 m/s | 4.2 |
| 1986 | 31.1°C | 21.4°C | 26.2°C | 225 mm | 87% | 2.2 m/s | 4.7 |
| 1985 | 31.3°C | 21.0°C | 26.1°C | 330 mm | 88% | 2.1 m/s | 4.4 |
| 1984 | 31.0°C | 21.4°C | 26.2°C | 443 mm | 90% | 2.6 m/s | 4.4 |
| 1983 | 31.5°C | 22.7°C | 27.1°C | 225 mm | 88% | 2.4 m/s | — |
| 1982 | 30.9°C | 21.1°C | 26.0°C | 479 mm | 91% | 2.3 m/s | — |
| 1981 | 30.9°C | 21.3°C | 26.1°C | 325 mm | 89% | 2.1 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 31.4°C with lows near 21.9°C (mean 26.7°C), based on 45 years of NASA POWER data.
August averages 333 mm of rainfall in Korea, a relatively wet time of year. The wettest on record was 502 mm in 2024.
The hottest August reached 34.4°C in 2009. The coldest dipped to 20.9°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.2°C. Daytime highs moved from 31.1°C to 31.2°C and overnight lows from 21.5°C to 21.8°C over the same span.
August is one of the warmer months of the year in Korea and a relatively wet time of year, so plan for around 31.4°C daytime highs and 21.9°C at night.
Not quite — August is the 8th coolest month in Korea, averaging 26.7°C.
For August in Korea, pack light, breathable clothing and sun protection, with typical highs of 31.4°C and lows of 21.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 88% — quite humid.
Average wind speed in August is 2.2 m/s. The windiest August on record averaged 2.9 m/s (1997).
The wettest August on record was 2024 with 502 mm. On average, August sees 333 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Korea behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
