Average annual temperature is 12.3 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -18.1 °C
Number of sunny days: 185 days
Number of rainy days: 166 days
Number of snow days: 14 days
Look at detailed online map of Sŏŭn
* Weather data for Sŏŭn South Korea is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 11.8 | 11.3 | 23.2 | 25.5 | 30.1 | 33.3 | 33.1 | 34.5 | 30.0 | 21.9 | 22.5 | 15.4 |
| Average daytime temperature (°C) | 1.7 | 6.7 | 14.9 | 17.7 | 23.4 | 26.9 | 29.5 | 29.9 | 26.0 | 18.5 | 9.5 | 3.8 |
| Average temperature (°C) | -2.7 | 0.7 | 7.9 | 11.7 | 17.5 | 21.7 | 25.2 | 25.5 | 21.5 | 12.9 | 4.6 | -0.3 |
| Average night temperature (°C) | -6.9 | -3.3 | 1.8 | 6.3 | 11.9 | 17.0 | 21.8 | 21.8 | 17.7 | 8.3 | 0.4 | -3.9 |
| Absolute minimum temperature (°C) | -18.1 | -6.6 | -4.9 | -1.1 | 3.0 | 12.8 | 18.1 | 16.0 | 10.3 | 2.6 | -8.5 | -14.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.0 | 8.1 | 9.0 | 7.6 | 9.1 | 9.5 | 8.0 | 8.3 | 7.4 | 7.9 | 7.0 | 5.9 |
| Precipitation (mm) | 52 | 2 | 22 | 104 | 141 | 263 | 386 | 341 | 173 | 23 | 70 | 89 |
| Sunny days | 20 | 24 | 23 | 14 | 19 | 8 | 6 | 5 | 10 | 19 | 17 | 20 |
| Rainy days | 3 | 2 | 8 | 16 | 12 | 22 | 25 | 26 | 20 | 12 | 11 | 9 |
| Snow days | 8 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 |
The largest precipitation sum in Sŏŭn is at