Average annual temperature is 13.8 °C
Absolute maximum temperature: 35.5 °C
Absolute minimum temperature: -15.2 °C
Number of sunny days: 201 days
Number of rainy days: 156 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) | 12.2 | 14.4 | 25.0 | 27.4 | 33.9 | 35.4 | 34.1 | 35.5 | 30.5 | 22.8 | 25.5 | 17.1 |
| Average daytime temperature (°C) | 4.3 | 8.7 | 17.7 | 20.2 | 25.3 | 29.4 | 30.4 | 31.3 | 27.0 | 20.3 | 12.2 | 5.9 |
| Average temperature (°C) | -0.8 | 2.5 | 10.0 | 13.4 | 19.2 | 23.8 | 25.9 | 26.7 | 22.5 | 14.2 | 6.7 | 1.2 |
| Average night temperature (°C) | -5.2 | -2.2 | 3.0 | 7.1 | 13.3 | 18.8 | 22.3 | 23.0 | 18.8 | 9.2 | 1.7 | -2.8 |
| Absolute minimum temperature (°C) | -15.2 | -6.3 | -3.0 | 1.3 | 3.5 | 15.3 | 18.6 | 17.7 | 13.1 | 3.7 | -6.9 | -12.1 |
| 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 | 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 | 10.2 | 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 | 7.7 | 9.1 | 8.2 | 8.3 | 9.9 | 7.5 | 9.2 | 7.6 | 8.8 | 7.7 | 6.4 |
| Precipitation (mm) | 33 | 10 | 47 | 47 | 154 | 211 | 436 | 299 | 270 | 9 | 41 | 95 |
| Sunny days | 22 | 21 | 24 | 16 | 19 | 10 | 4 | 10 | 13 | 22 | 18 | 22 |
| Rainy days | 6 | 5 | 7 | 14 | 12 | 20 | 27 | 21 | 17 | 9 | 12 | 6 |
| Snow days | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The largest precipitation sum in Yŏnsan is at