Average annual temperature is 12.9 °C
Absolute maximum temperature: 34.6 °C
Absolute minimum temperature: -18.3 °C
Number of sunny days: 187 days
Number of rainy days: 166 days
Number of snow days: 12 days
Look at detailed online map of Sum-mal
* Weather data for Sum-mal 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 | 10.4 | 25.3 | 26.7 | 32.4 | 34.6 | 33.5 | 34.5 | 31.3 | 22.2 | 23.5 | 16.8 |
| Average daytime temperature (°C) | 2.1 | 6.9 | 15.8 | 19.3 | 24.8 | 28.0 | 29.7 | 30.2 | 26.4 | 18.8 | 10.1 | 4.6 |
| Average temperature (°C) | -2.7 | 1.0 | 8.6 | 12.8 | 18.7 | 22.7 | 25.6 | 26.1 | 22.1 | 13.5 | 5.2 | 0.4 |
| Average night temperature (°C) | -7.3 | -3.7 | 2.4 | 7.0 | 12.9 | 17.9 | 22.4 | 22.4 | 18.5 | 8.7 | 0.6 | -3.4 |
| Absolute minimum temperature (°C) | -18.3 | -7.6 | -4.8 | 0.0 | 4.5 | 13.8 | 20.2 | 15.8 | 11.8 | 2.9 | -7.6 | -14.1 |
| 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) | 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) | 7.0 | 8.3 | 9.4 | 7.6 | 8.9 | 9.8 | 7.5 | 8.4 | 7.3 | 8.2 | 7.1 | 6.0 |
| Precipitation (mm) | 43 | 1 | 22 | 79 | 137 | 206 | 479 | 415 | 204 | 20 | 79 | 85 |
| Sunny days | 19 | 23 | 23 | 16 | 22 | 9 | 5 | 6 | 7 | 22 | 16 | 19 |
| Rainy days | 7 | 4 | 8 | 14 | 9 | 21 | 26 | 25 | 23 | 9 | 12 | 8 |
| Snow days | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
The largest precipitation sum in Sum-mal is at