Average annual temperature is 13.9 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -15.1 °C
Number of sunny days: 197 days
Number of rainy days: 159 days
Number of snow days: 9 days
Look at detailed online map of Ŭmjima
* Weather data for Ŭmjima 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) | 12.8 | 14.0 | 25.0 | 26.4 | 33.9 | 35.9 | 34.0 | 35.5 | 31.0 | 23.0 | 25.8 | 16.7 |
| Average daytime temperature (°C) | 4.4 | 8.6 | 17.6 | 19.9 | 25.1 | 29.6 | 30.4 | 31.3 | 27.0 | 20.4 | 12.3 | 6.1 |
| Average temperature (°C) | -0.7 | 2.5 | 10.0 | 13.2 | 19.0 | 23.8 | 26.0 | 26.9 | 22.7 | 14.4 | 6.8 | 1.4 |
| Average night temperature (°C) | -5.0 | -2.3 | 3.2 | 7.1 | 13.2 | 18.8 | 22.7 | 23.2 | 18.9 | 9.4 | 1.9 | -2.6 |
| Absolute minimum temperature (°C) | -15.1 | -6.0 | -3.5 | 1.2 | 3.8 | 15.5 | 18.9 | 18.2 | 13.6 | 3.8 | -6.6 | -12.0 |
| 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 | 14.4 | 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) | 7.5 | 7.7 | 9.0 | 8.3 | 8.3 | 9.9 | 7.5 | 9.2 | 7.5 | 8.8 | 7.8 | 6.4 |
| Precipitation (mm) | 27 | 11 | 47 | 45 | 135 | 244 | 443 | 288 | 246 | 8 | 38 | 87 |
| Sunny days | 21 | 20 | 23 | 17 | 18 | 9 | 4 | 9 | 13 | 23 | 20 | 20 |
| Rainy days | 5 | 7 | 8 | 13 | 13 | 21 | 27 | 22 | 17 | 8 | 10 | 8 |
| Snow days | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The largest precipitation sum in Ŭmjima is at