Average annual temperature is 13.1 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: -15.3 °C
Number of sunny days: 185 days
Number of rainy days: 164 days
Number of snow days: 16 days
Look at detailed online map of Yŏnam
* Weather data for Yŏnam 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) | 11.7 | 9.7 | 22.8 | 25.8 | 30.2 | 34.2 | 32.7 | 34.9 | 30.0 | 22.4 | 23.1 | 16.8 |
| Average daytime temperature (°C) | 2.2 | 5.0 | 13.2 | 17.5 | 23.0 | 25.7 | 28.5 | 29.5 | 25.8 | 19.2 | 10.5 | 5.0 |
| Average temperature (°C) | -1.1 | 1.3 | 7.7 | 12.4 | 17.8 | 21.4 | 25.1 | 25.8 | 22.3 | 14.9 | 6.8 | 1.5 |
| Average night temperature (°C) | -5.0 | -1.9 | 3.3 | 8.5 | 13.7 | 18.4 | 22.7 | 22.9 | 19.4 | 10.9 | 2.8 | -2.0 |
| Absolute minimum temperature (°C) | -15.3 | -4.4 | -1.5 | 3.8 | 6.3 | 15.3 | 20.3 | 18.4 | 14.7 | 5.9 | -5.2 | -12.7 |
| 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 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.1 | 14.1 | 14.7 | 14.4 | 13.5 | 12.4 | 11.2 | 10.2 | 9.7 |
| 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) | 7.2 | 8.4 | 9.5 | 7.8 | 8.6 | 9.5 | 7.6 | 8.7 | 7.5 | 8.1 | 6.9 | 5.3 |
| Precipitation (mm) | 38 | 1 | 11 | 71 | 129 | 168 | 390 | 253 | 188 | 34 | 93 | 76 |
| Sunny days | 19 | 25 | 25 | 17 | 19 | 13 | 5 | 8 | 7 | 20 | 13 | 14 |
| Rainy days | 7 | 2 | 6 | 13 | 12 | 17 | 26 | 23 | 23 | 11 | 16 | 8 |
| Snow days | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 9 |
The largest precipitation sum in Yŏnam is at