Average annual temperature is 13.6 °C
Absolute maximum temperature: 35.2 °C
Absolute minimum temperature: -16.3 °C
Number of sunny days: 174 days
Number of rainy days: 180 days
Number of snow days: 11 days
Look at detailed online map of Sŏngnam
* Weather data for Sŏngnam 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) | 14.3 | 11.6 | 25.1 | 26.1 | 31.5 | 34.2 | 33.7 | 35.2 | 31.0 | 22.2 | 23.7 | 17.4 |
| Average daytime temperature (°C) | 3.4 | 7.0 | 16.2 | 19.1 | 24.3 | 28.7 | 29.5 | 30.9 | 26.6 | 19.5 | 11.2 | 5.6 |
| Average temperature (°C) | -1.4 | 1.4 | 9.2 | 13.1 | 18.8 | 23.2 | 25.8 | 26.5 | 22.6 | 14.6 | 6.6 | 1.8 |
| Average night temperature (°C) | -5.6 | -3.0 | 3.5 | 8.1 | 14.0 | 18.7 | 22.9 | 23.2 | 19.2 | 10.5 | 2.2 | -1.8 |
| Absolute minimum temperature (°C) | -16.3 | -7.1 | -4.8 | 1.1 | 5.1 | 14.9 | 19.1 | 17.5 | 12.3 | 5.2 | -7.6 | -13.1 |
| 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) | 10.0 | 10.9 | 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 | 7.6 | 9.0 | 7.6 | 8.2 | 10.1 | 7.2 | 9.3 | 7.3 | 8.6 | 7.2 | 5.6 |
| Precipitation (mm) | 42 | 5 | 30 | 71 | 129 | 164 | 469 | 384 | 276 | 15 | 76 | 94 |
| Sunny days | 18 | 21 | 23 | 12 | 17 | 11 | 4 | 5 | 8 | 23 | 16 | 16 |
| Rainy days | 9 | 6 | 8 | 18 | 14 | 19 | 27 | 26 | 22 | 8 | 14 | 9 |
| Snow days | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
The best time to visit Sŏngnam during the most sunny months:
The largest precipitation sum in Sŏngnam is at