Seoul's average temperature over the last 30 years is around 12°C. Aug is typically the hottest month and Jan the coldest, with total annual rainfall averaging about 1255 mm.
| Year | Max Temp | Min Temp | Precipitation |
|---|---|---|---|
| 2025 | 39°C | -14°C | 1334 mm |
| 2024 | 36°C | -15°C | 1444 mm |
| 2023 | 34°C | -19°C | 1632 mm |
| 2022 | 34°C | -18°C | 1669 mm |
| 2021 | 35°C | -19°C | 1237 mm |
| 2020 | 34°C | -13°C | 1595 mm |
| 2019 | 35°C | -12°C | 849 mm |
| 2018 | 36°C | -20°C | 1156 mm |
| 2017 | 33°C | -12°C | 1106 mm |
| 2016 | 33°C | -18°C | 976 mm |
| 2015 | 36°C | -11°C | 694 mm |
| 2014 | 36°C | -12°C | 789 mm |
| 2013 | 32°C | -23°C | 1233 mm |
| 2012 | 34°C | -18°C | 1376 mm |
| 2011 | 32°C | -19°C | 1594 mm |
| 2010 | 33°C | -24°C | 1287 mm |
| 2009 | 32°C | -12°C | 1094 mm |
| 2008 | 34°C | -13°C | 1014 mm |
| 2007 | 32°C | -10°C | 1552 mm |
| 2006 | 33°C | -14°C | 1368 mm |
| 2005 | 33°C | -14°C | 1369 mm |
| 2004 | 34°C | -23°C | 1301 mm |
| 2003 | 31°C | -18°C | 1425 mm |
| 2002 | 33°C | -14°C | 1318 mm |
| 2001 | 33°C | -24°C | 894 mm |
| 2000 | 33°C | -13°C | 1259 mm |
| 1999 | 33°C | -12°C | 1291 mm |
| 1998 | 31°C | -15°C | 1685 mm |
| 1997 | 33°C | -14°C | 1097 mm |
| 1996 | 33°C | -15°C | 992 mm |
| Month | Avg High | Avg Low | Rainfall |
|---|---|---|---|
| Jan | 2°C | -7°C | 20 mm |
| Feb | 5°C | -5°C | 24 mm |
| Mar | 10°C | 0°C | 41 mm |
| Apr | 17°C | 6°C | 73 mm |
| May | 22°C | 12°C | 99 mm |
| Jun | 27°C | 17°C | 135 mm |
| Jul | 28°C | 22°C | 326 mm |
| Aug | 29°C | 22°C | 267 mm |
| Sep | 25°C | 17°C | 138 mm |
| Oct | 19°C | 9°C | 61 mm |
| Nov | 11°C | 2°C | 48 mm |
| Dec | 3°C | -5°C | 23 mm |