Average annual temperature is 13.6 °C
Absolute maximum temperature: 35.1 °C
Absolute minimum temperature: -14.4 °C
Number of sunny days: 186 days
Number of rainy days: 168 days
Number of snow days: 11 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) | 13.9 | 12.1 | 25.3 | 27.6 | 31.2 | 35.1 | 33.8 | 34.9 | 30.5 | 22.9 | 23.5 | 17.7 |
| Average daytime temperature (°C) | 3.6 | 6.7 | 15.2 | 19.0 | 24.6 | 28.3 | 29.5 | 30.6 | 26.6 | 19.8 | 11.3 | 5.8 |
| Average temperature (°C) | -1.0 | 1.3 | 8.6 | 13.0 | 18.7 | 22.6 | 25.7 | 26.3 | 22.5 | 15.0 | 7.2 | 2.0 |
| Average night temperature (°C) | -5.1 | -2.6 | 3.3 | 8.3 | 13.6 | 18.2 | 22.9 | 22.9 | 19.2 | 10.7 | 3.0 | -1.6 |
| Absolute minimum temperature (°C) | -14.4 | -5.8 | -2.9 | 1.8 | 5.7 | 14.8 | 20.5 | 17.9 | 13.3 | 5.3 | -5.5 | -13.0 |
| 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 | 10.8 | 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 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.2 | 8.1 | 9.4 | 7.9 | 8.5 | 9.9 | 7.5 | 8.8 | 7.2 | 8.4 | 6.8 | 4.7 |
| Precipitation (mm) | 27 | 1 | 17 | 62 | 106 | 115 | 415 | 230 | 244 | 20 | 82 | 88 |
| Sunny days | 21 | 25 | 23 | 15 | 20 | 12 | 5 | 6 | 10 | 21 | 16 | 12 |
| Rainy days | 6 | 3 | 8 | 15 | 11 | 18 | 26 | 25 | 20 | 10 | 14 | 12 |
| Snow days | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
The best time to visit Sum-mal during the most sunny months:
The largest precipitation sum in Sum-mal is at