Average annual temperature is 14.5 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -11.9 °C
Number of sunny days: 182 days
Number of rainy days: 177 days
Number of snow days: 6 days
Look at detailed online map of Ŭlmun
* Weather data for Ŭlmun 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) | 16.9 | 14.2 | 23.9 | 27.8 | 28.1 | 30.8 | 34.3 | 34.5 | 30.8 | 24.4 | 26.8 | 19.3 |
| Average daytime temperature (°C) | 7.1 | 10.6 | 17.1 | 19.0 | 22.3 | 26.8 | 29.1 | 30.7 | 27.2 | 21.8 | 14.7 | 9.3 |
| Average temperature (°C) | 1.5 | 4.6 | 10.5 | 13.6 | 17.7 | 22.2 | 25.3 | 26.7 | 23.1 | 15.8 | 8.9 | 4.1 |
| Average night temperature (°C) | -2.8 | 0.1 | 5.5 | 9.0 | 13.9 | 18.7 | 22.6 | 23.7 | 19.7 | 10.9 | 3.9 | 0.1 |
| Absolute minimum temperature (°C) | -11.9 | -4.8 | -2.1 | 2.5 | 6.9 | 15.2 | 19.7 | 22.0 | 15.4 | 6.0 | -3.8 | -7.7 |
| 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) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.6 | 7.7 | 8.7 | 7.9 | 7.6 | 8.7 | 7.0 | 9.6 | 7.4 | 8.6 | 8.1 | 7.1 |
| Precipitation (mm) | 69 | 41 | 61 | 98 | 275 | 201 | 290 | 320 | 242 | 9 | 34 | 79 |
| Sunny days | 24 | 19 | 21 | 15 | 13 | 10 | 4 | 4 | 6 | 25 | 22 | 19 |
| Rainy days | 5 | 9 | 10 | 15 | 18 | 20 | 27 | 27 | 24 | 6 | 7 | 9 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
The largest precipitation sum in Ŭlmun is at