Average annual temperature is 13.5 °C
Absolute maximum temperature: 35.2 °C
Absolute minimum temperature: -16.4 °C
Number of sunny days: 204 days
Number of rainy days: 156 days
Number of snow days: 5 days
Look at detailed online map of Sumu
* Weather data for Sumu 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) | 14.9 | 14.5 | 22.3 | 23.1 | 31.2 | 32.0 | 33.0 | 35.2 | 29.5 | 23.7 | 25.0 | 17.7 |
| Average daytime temperature (°C) | 3.4 | 6.6 | 13.4 | 16.6 | 21.8 | 25.5 | 29.3 | 28.4 | 24.4 | 20.0 | 12.2 | 5.5 |
| Average temperature (°C) | -0.6 | 2.4 | 9.1 | 12.5 | 17.8 | 21.9 | 26.1 | 25.5 | 21.5 | 15.3 | 7.7 | 1.8 |
| Average night temperature (°C) | -4.2 | -0.9 | 4.9 | 8.8 | 14.0 | 18.5 | 23.4 | 23.1 | 18.7 | 11.4 | 3.7 | -1.5 |
| Absolute minimum temperature (°C) | -16.4 | -7.1 | -2.4 | 3.9 | 5.1 | 14.7 | 19.1 | 17.6 | 11.8 | 6.7 | -5.8 | -13.5 |
| 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) | 7.3 | 7.5 | 8.5 | 8.0 | 9.3 | 10.3 | 8.3 | 7.9 | 7.5 | 8.3 | 7.2 | 6.2 |
| Precipitation (mm) | 82 | 40 | 15 | 62 | 113 | 193 | 205 | 441 | 190 | 26 | 72 | 153 |
| Sunny days | 25 | 19 | 24 | 15 | 17 | 12 | 11 | 8 | 12 | 18 | 21 | 22 |
| Rainy days | 6 | 5 | 7 | 15 | 14 | 18 | 20 | 23 | 18 | 13 | 8 | 9 |
| Snow days | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Sumu during the most sunny months:
The largest precipitation sum in Sumu is at