Average annual temperature is 11.0 °C
Absolute maximum temperature: 32.9 °C
Absolute minimum temperature: -20.0 °C
Number of sunny days: 184 days
Number of rainy days: 167 days
Number of snow days: 14 days
Look at detailed online map of Sundam
* Weather data for Sundam 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) | 9.3 | 9.5 | 20.6 | 23.6 | 27.8 | 32.9 | 31.9 | 32.6 | 29.9 | 21.0 | 21.4 | 13.1 |
| Average daytime temperature (°C) | -0.5 | 4.7 | 12.9 | 16.0 | 21.9 | 25.8 | 28.6 | 28.2 | 25.3 | 17.7 | 7.6 | 1.9 |
| Average temperature (°C) | -5.1 | -0.8 | 6.3 | 10.4 | 16.4 | 20.8 | 24.6 | 24.4 | 20.6 | 12.5 | 3.1 | -2.0 |
| Average night temperature (°C) | -10.0 | -4.6 | 0.6 | 5.7 | 11.5 | 16.3 | 21.4 | 20.9 | 17.0 | 8.3 | -0.8 | -5.6 |
| Absolute minimum temperature (°C) | -20.0 | -8.3 | -6.2 | -1.3 | 4.4 | 11.8 | 18.4 | 16.2 | 8.9 | 1.7 | -9.4 | -17.5 |
| 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) | 7.0 | 8.5 | 9.4 | 7.3 | 9.3 | 9.6 | 8.4 | 7.9 | 7.8 | 8.4 | 6.5 | 6.0 |
| Precipitation (mm) | 52 | 2 | 16 | 99 | 145 | 184 | 270 | 278 | 111 | 35 | 100 | 75 |
| Sunny days | 20 | 25 | 25 | 11 | 22 | 9 | 5 | 5 | 13 | 18 | 15 | 16 |
| Rainy days | 4 | 1 | 6 | 19 | 9 | 21 | 26 | 26 | 17 | 13 | 13 | 12 |
| Snow days | 7 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 |
The largest precipitation sum in Sundam is at