Average annual temperature is 13.0 °C
Absolute maximum temperature: 35.7 °C
Absolute minimum temperature: -19.1 °C
Number of sunny days: 187 days
Number of rainy days: 168 days
Number of snow days: 10 days
Look at detailed online map of Yŏlsan
* Weather data for Yŏlsan 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) | 14.7 | 14.1 | 22.1 | 24.7 | 30.9 | 33.5 | 34.2 | 35.7 | 29.6 | 23.5 | 25.0 | 16.9 |
| Average daytime temperature (°C) | 2.6 | 6.1 | 13.6 | 16.6 | 22.5 | 25.8 | 30.1 | 28.5 | 24.5 | 20.1 | 11.4 | 3.6 |
| Average temperature (°C) | -1.8 | 1.3 | 8.9 | 12.5 | 18.2 | 21.9 | 26.4 | 25.3 | 21.3 | 15.0 | 6.6 | -0.3 |
| Average night temperature (°C) | -5.9 | -2.6 | 4.2 | 8.6 | 14.1 | 18.4 | 23.6 | 22.8 | 18.3 | 10.8 | 2.4 | -4.0 |
| Absolute minimum temperature (°C) | -19.1 | -11.7 | -4.0 | 3.3 | 5.8 | 14.7 | 20.3 | 16.5 | 12.1 | 5.4 | -7.1 | -17.7 |
| 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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 7.4 | 7.6 | 8.7 | 7.9 | 9.4 | 9.9 | 8.5 | 7.3 | 7.6 | 8.4 | 6.9 | 6.0 |
| Precipitation (mm) | 81 | 25 | 16 | 82 | 93 | 186 | 162 | 418 | 154 | 48 | 80 | 178 |
| Sunny days | 23 | 19 | 24 | 13 | 17 | 11 | 7 | 7 | 9 | 16 | 21 | 20 |
| Rainy days | 3 | 5 | 7 | 17 | 14 | 19 | 24 | 24 | 21 | 15 | 9 | 10 |
| Snow days | 5 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The largest precipitation sum in Yŏlsan is at