Average annual temperature is 13.9 °C
Absolute maximum temperature: 35.2 °C
Absolute minimum temperature: -15.4 °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 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) | 14.0 | 14.1 | 24.9 | 26.4 | 33.8 | 34.5 | 33.7 | 35.2 | 30.4 | 22.7 | 26.5 | 16.7 |
| Average daytime temperature (°C) | 4.1 | 8.3 | 17.5 | 19.7 | 24.8 | 29.1 | 30.2 | 31.1 | 26.7 | 20.1 | 12.2 | 5.9 |
| Average temperature (°C) | -0.6 | 2.6 | 10.3 | 13.3 | 19.0 | 23.6 | 25.7 | 26.6 | 22.5 | 14.6 | 6.9 | 1.5 |
| Average night temperature (°C) | -4.7 | -1.6 | 3.9 | 7.7 | 13.7 | 19.0 | 22.3 | 23.0 | 19.1 | 9.8 | 2.1 | -2.3 |
| Absolute minimum temperature (°C) | -15.4 | -6.1 | -2.3 | 2.2 | 4.5 | 15.7 | 18.3 | 18.5 | 14.1 | 5.2 | -6.9 | -12.2 |
| 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 | 9.7 |
| 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) | 7.4 | 7.6 | 8.9 | 8.3 | 8.1 | 10.0 | 7.3 | 9.2 | 7.5 | 8.9 | 7.7 | 6.3 |
| Precipitation (mm) | 36 | 12 | 44 | 46 | 119 | 259 | 413 | 282 | 231 | 8 | 34 | 102 |
| Sunny days | 24 | 20 | 22 | 16 | 18 | 13 | 3 | 7 | 14 | 24 | 19 | 21 |
| Rainy days | 4 | 6 | 9 | 14 | 13 | 17 | 28 | 24 | 16 | 7 | 11 | 7 |
| Snow days | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The largest precipitation sum in Yŏnam is at