Average annual temperature is 13.7 °C
Absolute maximum temperature: 35.2 °C
Absolute minimum temperature: -14.4 °C
Number of sunny days: 198 days
Number of rainy days: 162 days
Number of snow days: 5 days
Look at detailed online map of Kŏsanŭmji
* Weather data for Kŏsanŭmji 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) | 15.5 | 14.5 | 23.4 | 28.4 | 31.7 | 34.3 | 34.3 | 35.2 | 29.9 | 24.3 | 25.4 | 16.5 |
| Average daytime temperature (°C) | 5.7 | 9.0 | 17.1 | 18.8 | 23.0 | 28.6 | 29.1 | 30.5 | 26.5 | 20.7 | 12.8 | 7.1 |
| Average temperature (°C) | 0.2 | 3.0 | 9.9 | 12.7 | 17.8 | 22.7 | 25.1 | 26.1 | 22.1 | 14.4 | 7.2 | 2.2 |
| Average night temperature (°C) | -3.8 | -1.5 | 4.0 | 7.3 | 12.9 | 18.0 | 22.2 | 22.5 | 18.6 | 9.1 | 2.6 | -1.4 |
| Absolute minimum temperature (°C) | -14.4 | -6.1 | -3.7 | 0.7 | 5.5 | 13.8 | 18.3 | 18.2 | 13.1 | 3.8 | -5.8 | -10.6 |
| 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) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 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) | 7.5 | 7.5 | 8.9 | 8.2 | 8.0 | 9.4 | 7.1 | 9.4 | 7.5 | 8.9 | 7.8 | 6.8 |
| Precipitation (mm) | 39 | 21 | 43 | 72 | 130 | 160 | 368 | 344 | 202 | 6 | 63 | 86 |
| Sunny days | 25 | 19 | 22 | 16 | 17 | 12 | 2 | 8 | 9 | 26 | 21 | 21 |
| Rainy days | 4 | 9 | 9 | 14 | 14 | 18 | 29 | 23 | 21 | 5 | 9 | 7 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The largest precipitation sum in Kŏsanŭmji is at