Average annual temperature is 13.3 °C
Absolute maximum temperature: 34.6 °C
Absolute minimum temperature: -15.9 °C
Number of sunny days: 188 days
Number of rainy days: 173 days
Number of snow days: 4 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) | 15.0 | 13.7 | 22.6 | 25.8 | 32.0 | 32.6 | 33.8 | 34.6 | 28.4 | 22.0 | 24.7 | 17.3 |
| Average daytime temperature (°C) | 3.9 | 7.9 | 15.8 | 17.6 | 22.2 | 27.0 | 28.7 | 29.5 | 24.9 | 19.4 | 11.8 | 5.9 |
| Average temperature (°C) | -0.4 | 2.7 | 9.7 | 12.5 | 17.3 | 21.9 | 24.8 | 25.5 | 21.5 | 14.5 | 7.1 | 1.9 |
| Average night temperature (°C) | -4.0 | -1.2 | 4.7 | 8.0 | 13.0 | 18.0 | 22.0 | 22.6 | 18.6 | 10.5 | 2.6 | -1.3 |
| Absolute minimum temperature (°C) | -15.9 | -6.3 | -3.8 | 1.3 | 5.7 | 14.3 | 17.9 | 20.1 | 13.9 | 5.0 | -7.3 | -12.5 |
| 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 | 9.8 |
| 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) | 7.7 | 7.2 | 9.0 | 8.5 | 8.4 | 9.4 | 7.5 | 9.1 | 7.3 | 8.7 | 7.8 | 7.0 |
| Precipitation (mm) | 38 | 19 | 63 | 60 | 157 | 186 | 367 | 227 | 234 | 4 | 28 | 102 |
| Sunny days | 26 | 17 | 19 | 15 | 15 | 11 | 2 | 5 | 9 | 24 | 23 | 22 |
| Rainy days | 4 | 8 | 12 | 15 | 16 | 19 | 29 | 26 | 21 | 7 | 7 | 9 |
| Snow days | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Ŭmjima is at