Average annual temperature is 13.0 °C
Absolute maximum temperature: 33.9 °C
Absolute minimum temperature: -15.5 °C
Number of sunny days: 162 days
Number of rainy days: 187 days
Number of snow days: 16 days
Look at detailed online map of Seosan
* Weather data for Seosan 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) | 14.9 | 12.4 | 21.9 | 24.2 | 29.6 | 31.5 | 32.2 | 33.9 | 29.6 | 22.0 | 23.0 | 18.0 |
| Average daytime temperature (°C) | 3.5 | 7.1 | 15.1 | 17.6 | 22.1 | 26.5 | 28.1 | 29.8 | 26.2 | 19.1 | 11.3 | 5.8 |
| Average temperature (°C) | -0.7 | 1.8 | 8.8 | 12.1 | 17.3 | 21.4 | 24.6 | 25.5 | 21.9 | 14.0 | 6.8 | 2.4 |
| Average night temperature (°C) | -4.6 | -1.9 | 4.1 | 7.3 | 13.1 | 17.4 | 21.9 | 22.2 | 18.7 | 9.6 | 2.7 | -1.0 |
| Absolute minimum temperature (°C) | -15.5 | -7.1 | -3.8 | 0.3 | 5.1 | 13.8 | 19.3 | 18.3 | 12.3 | 5.3 | -7.1 | -12.3 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.0 | 7.3 | 8.9 | 7.5 | 8.1 | 9.3 | 6.7 | 9.4 | 7.6 | 8.8 | 7.2 | 5.7 |
| Precipitation (mm) | 43 | 13 | 56 | 113 | 155 | 198 | 542 | 337 | 174 | 12 | 95 | 135 |
| Sunny days | 16 | 21 | 22 | 16 | 14 | 9 | 1 | 4 | 9 | 23 | 14 | 13 |
| Rainy days | 7 | 6 | 9 | 14 | 17 | 21 | 30 | 27 | 21 | 8 | 16 | 11 |
| Snow days | 8 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
The largest precipitation sum in Seosan is at