Average annual temperature is 12.5 °C
Absolute maximum temperature: 31.1 °C
Absolute minimum temperature: -14.0 °C
Number of sunny days: 196 days
Number of rainy days: 155 days
Number of snow days: 14 days
Look at detailed online map of Iwŏn-myŏn
* Weather data for Iwŏn-myŏn 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) | 11.6 | 7.8 | 17.6 | 21.6 | 23.7 | 27.8 | 30.5 | 31.1 | 27.8 | 21.6 | 20.8 | 14.8 |
| Average daytime temperature (°C) | 2.0 | 3.6 | 9.4 | 14.3 | 19.0 | 22.2 | 26.4 | 27.6 | 24.6 | 18.6 | 10.7 | 5.2 |
| Average temperature (°C) | -0.7 | 1.1 | 5.9 | 10.8 | 15.5 | 19.3 | 24.0 | 25.1 | 22.0 | 15.9 | 8.0 | 2.5 |
| Average night temperature (°C) | -4.0 | -1.3 | 3.0 | 8.1 | 12.9 | 17.3 | 22.2 | 22.7 | 19.6 | 12.9 | 5.0 | -0.4 |
| Absolute minimum temperature (°C) | -14.0 | -4.5 | -1.0 | 3.8 | 7.2 | 14.9 | 19.5 | 20.2 | 15.7 | 8.1 | -2.6 | -8.7 |
| 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 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.2 | 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) | 7.1 | 8.5 | 9.3 | 8.2 | 8.6 | 9.5 | 7.8 | 9.0 | 7.6 | 8.3 | 6.6 | 4.7 |
| Precipitation (mm) | 36 | 2 | 14 | 94 | 153 | 190 | 357 | 263 | 149 | 17 | 116 | 86 |
| Sunny days | 19 | 26 | 25 | 18 | 19 | 14 | 8 | 11 | 12 | 18 | 13 | 13 |
| Rainy days | 6 | 1 | 6 | 12 | 12 | 16 | 23 | 20 | 18 | 13 | 16 | 12 |
| Snow days | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6 |
The largest precipitation sum in Iwŏn-myŏn is at