Average annual temperature is 10.3 °C
Absolute maximum temperature: 31.4 °C
Absolute minimum temperature: -21.1 °C
Number of sunny days: 170 days
Number of rainy days: 171 days
Number of snow days: 24 days
Look at detailed online map of Sulmyŏn
* Weather data for Sulmyŏn 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) | 11.0 | 11.3 | 21.0 | 21.9 | 27.7 | 29.9 | 31.4 | 31.1 | 27.4 | 19.5 | 21.3 | 13.7 |
| Average daytime temperature (°C) | -0.5 | 4.6 | 12.4 | 15.1 | 20.5 | 24.2 | 27.2 | 27.8 | 23.7 | 16.2 | 7.6 | 1.5 |
| Average temperature (°C) | -4.8 | -0.8 | 6.3 | 9.6 | 15.4 | 19.5 | 23.2 | 23.5 | 19.5 | 11.1 | 2.9 | -2.2 |
| Average night temperature (°C) | -8.7 | -4.4 | 1.0 | 4.9 | 10.4 | 15.3 | 19.9 | 20.2 | 16.0 | 6.8 | -1.2 | -5.7 |
| Absolute minimum temperature (°C) | -21.1 | -9.2 | -7.6 | -2.0 | 3.0 | 10.8 | 16.1 | 15.9 | 9.2 | 0.5 | -11.4 | -17.7 |
| 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 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| 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) | 6.9 | 8.1 | 9.2 | 8.0 | 9.0 | 9.6 | 7.5 | 8.8 | 7.5 | 8.2 | 7.1 | 5.9 |
| Precipitation (mm) | 38 | 4 | 28 | 121 | 127 | 248 | 465 | 305 | 199 | 30 | 97 | 95 |
| Sunny days | 18 | 22 | 22 | 14 | 16 | 7 | 4 | 5 | 8 | 21 | 17 | 16 |
| Rainy days | 3 | 1 | 9 | 16 | 15 | 23 | 27 | 26 | 22 | 10 | 11 | 8 |
| Snow days | 10 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 7 |
The largest precipitation sum in Sulmyŏn is at