Average annual temperature is 11.7 °C
Absolute maximum temperature: 32.4 °C
Absolute minimum temperature: -18.2 °C
Number of sunny days: 182 days
Number of rainy days: 168 days
Number of snow days: 15 days
Look at detailed online map of Ŭmsan
* Weather data for Ŭmsan 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) | 13.3 | 11.2 | 20.5 | 23.7 | 29.7 | 30.2 | 32.4 | 32.2 | 26.7 | 19.7 | 22.0 | 15.1 |
| Average daytime temperature (°C) | 1.7 | 5.7 | 13.6 | 15.3 | 20.0 | 24.9 | 27.2 | 27.6 | 23.3 | 17.2 | 9.7 | 3.9 |
| Average temperature (°C) | -2.2 | 1.1 | 8.1 | 10.5 | 15.6 | 20.2 | 23.5 | 24.0 | 20.1 | 13.1 | 5.4 | 0.3 |
| Average night temperature (°C) | -5.8 | -2.2 | 3.7 | 6.5 | 11.9 | 16.7 | 21.0 | 21.4 | 17.5 | 9.9 | 1.3 | -2.6 |
| Absolute minimum temperature (°C) | -18.2 | -8.1 | -5.9 | -0.7 | 4.4 | 13.3 | 16.7 | 19.2 | 12.6 | 3.4 | -9.4 | -14.5 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.8 | 7.6 | 9.0 | 8.6 | 8.5 | 9.8 | 8.1 | 9.2 | 7.3 | 8.8 | 8.0 | 7.0 |
| Precipitation (mm) | 32 | 20 | 52 | 60 | 154 | 191 | 339 | 254 | 302 | 8 | 43 | 131 |
| Sunny days | 24 | 16 | 21 | 15 | 16 | 8 | 2 | 6 | 9 | 23 | 21 | 21 |
| Rainy days | 4 | 5 | 10 | 15 | 15 | 22 | 29 | 25 | 21 | 8 | 7 | 7 |
| Snow days | 3 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 |
The largest precipitation sum in Ŭmsan is at