Seoul weather by month: average temperature and rainfall
Average monthly high and low temperatures, rainfall and the wettest months in Seoul, from Korea Meteorological Administration climate normals, to help you choose when to go and what to pack.
When it rains most
- Rainy season (jangma), normal dates
- around June 25 – around July 26Average onset and end published by the Korea Meteorological Administration for 1991–2020; actual dates vary each year. Sources
- Wettest months on average
- Jul, Aug, and SepThe three months with the highest normal rainfall at this station.
| Month | Avg high (°C) | Avg low (°C) | Rainfall (mm) |
|---|---|---|---|
| Jan | 2.1 | -5.5 | 16.8 |
| Feb | 5.1 | -3.2 | 28.2 |
| Mar | 11.0 | 1.9 | 36.9 |
| Apr | 17.9 | 8.0 | 72.9 |
| May | 23.6 | 13.5 | 103.6 |
| Jun | 27.6 | 18.7 | 129.5 |
| Jul | 29.0 | 22.3 | 414.4 |
| Aug | 30.0 | 22.9 | 348.2 |
| Sep | 26.2 | 17.7 | 141.5 |
| Oct | 20.2 | 10.6 | 52.2 |
| Nov | 11.9 | 3.5 | 51.1 |
| Dec | 4.2 | -3.4 | 22.6 |
Station Seoul · Korea Meteorological Administration · normals 1991–2020 · Sources
Seoul travel guides
Monthly weather by city
Photo credits1
- View of Buyongji Pond in the Changdeokgung Secret Garden, with a pavilion and trees
- Sadopaul · CC BY-SA 4.0 · CC BY-SA 4.0
