Average annual temperature is 14.2 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: -14.4 °C
Number of sunny days: 205 days
Number of rainy days: 154 days
Number of snow days: 6 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) | 16.9 | 17.3 | 25.4 | 28.8 | 34.5 | 36.4 | 35.5 | 35.9 | 30.5 | 23.7 | 27.4 | 18.9 |
| Average daytime temperature (°C) | 5.7 | 9.4 | 18.7 | 20.3 | 24.5 | 30.1 | 30.4 | 31.3 | 27.1 | 21.1 | 13.4 | 7.4 |
| Average temperature (°C) | -0.1 | 3.2 | 10.8 | 13.7 | 18.7 | 23.9 | 26.0 | 27.0 | 22.8 | 14.7 | 7.3 | 2.1 |
| Average night temperature (°C) | -4.4 | -1.8 | 3.5 | 7.5 | 13.3 | 18.9 | 22.6 | 23.4 | 19.0 | 9.0 | 2.3 | -2.1 |
| Absolute minimum temperature (°C) | -14.4 | -6.0 | -4.5 | 2.1 | 5.5 | 15.1 | 18.0 | 19.1 | 14.0 | 3.6 | -5.6 | -10.9 |
| 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 | 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 | 14.3 | 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) | 7.6 | 7.6 | 9.0 | 8.4 | 8.3 | 10.0 | 7.3 | 9.5 | 7.5 | 9.0 | 7.8 | 6.5 |
| Precipitation (mm) | 40 | 18 | 46 | 65 | 142 | 164 | 357 | 309 | 219 | 6 | 64 | 94 |
| Sunny days | 24 | 17 | 21 | 16 | 18 | 16 | 8 | 8 | 10 | 22 | 21 | 24 |
| Rainy days | 4 | 10 | 10 | 14 | 13 | 14 | 23 | 23 | 20 | 9 | 9 | 5 |
| Snow days | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The largest precipitation sum in Yŏnsan is at