Average annual temperature is 9.5 °C
Absolute maximum temperature: 31.7 °C
Absolute minimum temperature: -23.0 °C
Number of sunny days: 172 days
Number of rainy days: 175 days
Number of snow days: 18 days
Look at detailed online map of Sumil
* Weather data for Sumil 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) | 7.6 | 9.0 | 19.5 | 22.2 | 25.5 | 30.1 | 31.3 | 31.7 | 28.4 | 19.3 | 20.0 | 11.7 |
| Average daytime temperature (°C) | -2.4 | 3.2 | 11.6 | 14.3 | 19.9 | 24.0 | 27.3 | 27.0 | 23.5 | 16.4 | 6.4 | 0.3 |
| Average temperature (°C) | -7.5 | -2.1 | 5.0 | 9.0 | 14.9 | 19.2 | 23.2 | 22.9 | 19.2 | 11.4 | 1.8 | -3.5 |
| Average night temperature (°C) | -13.0 | -6.0 | -0.2 | 4.5 | 10.3 | 14.9 | 20.2 | 19.6 | 15.9 | 7.7 | -1.8 | -6.8 |
| Absolute minimum temperature (°C) | -23.0 | -12.0 | -7.6 | -2.4 | 4.5 | 10.8 | 17.6 | 16.3 | 9.4 | 1.5 | -11.5 | -19.6 |
| 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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 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 | 8.5 | 9.5 | 7.2 | 9.2 | 9.6 | 8.2 | 7.6 | 7.6 | 8.3 | 6.5 | 5.7 |
| Precipitation (mm) | 52 | 3 | 24 | 111 | 142 | 212 | 314 | 328 | 126 | 34 | 107 | 97 |
| Sunny days | 19 | 23 | 22 | 12 | 15 | 6 | 5 | 7 | 10 | 18 | 16 | 19 |
| Rainy days | 5 | 0 | 9 | 18 | 16 | 24 | 26 | 24 | 20 | 13 | 12 | 8 |
| Snow days | 7 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
The largest precipitation sum in Sumil is at