Average annual temperature is 13.9 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -15.0 °C
Number of sunny days: 204 days
Number of rainy days: 153 days
Number of snow days: 8 days
Look at detailed online map of Yŏnsan
* Weather data for Yŏnsan 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) | 13.1 | 14.1 | 24.6 | 26.1 | 33.5 | 35.9 | 34.0 | 35.5 | 30.5 | 23.1 | 26.0 | 16.6 |
| Average daytime temperature (°C) | 4.4 | 8.6 | 17.5 | 19.7 | 24.9 | 29.7 | 30.1 | 31.2 | 26.9 | 20.4 | 12.4 | 6.2 |
| Average temperature (°C) | -0.6 | 2.6 | 10.1 | 13.1 | 18.9 | 24.0 | 25.9 | 26.9 | 22.7 | 14.6 | 6.8 | 1.4 |
| Average night temperature (°C) | -4.8 | -2.0 | 3.5 | 7.2 | 13.4 | 19.1 | 22.7 | 23.3 | 19.1 | 9.7 | 1.8 | -2.7 |
| Absolute minimum temperature (°C) | -15.0 | -5.7 | -3.6 | 1.6 | 4.9 | 15.7 | 18.9 | 19.1 | 13.9 | 4.1 | -6.5 | -12.0 |
| 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 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.5 | 7.6 | 9.0 | 8.3 | 8.3 | 9.8 | 7.4 | 9.3 | 7.5 | 8.8 | 7.8 | 6.4 |
| Precipitation (mm) | 24 | 10 | 45 | 45 | 147 | 260 | 393 | 296 | 244 | 8 | 39 | 82 |
| Sunny days | 21 | 21 | 24 | 17 | 21 | 13 | 3 | 7 | 13 | 23 | 20 | 21 |
| Rainy days | 6 | 6 | 7 | 13 | 10 | 17 | 28 | 24 | 17 | 8 | 10 | 7 |
| Snow days | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The largest precipitation sum in Yŏnsan is at