Average annual temperature is 12.7 °C
Absolute maximum temperature: 33.8 °C
Absolute minimum temperature: -16.9 °C
Number of sunny days: 180 days
Number of rainy days: 172 days
Number of snow days: 13 days
Look at detailed online map of Iwon
* Weather data for Iwon 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) | 13.8 | 11.8 | 24.0 | 25.6 | 30.6 | 33.5 | 32.5 | 33.8 | 29.6 | 21.7 | 23.7 | 17.5 |
| Average daytime temperature (°C) | 3.0 | 6.6 | 15.7 | 18.4 | 23.1 | 28.0 | 28.8 | 30.0 | 25.7 | 18.8 | 10.7 | 5.1 |
| Average temperature (°C) | -1.8 | 1.0 | 8.5 | 12.2 | 17.4 | 22.3 | 24.7 | 25.5 | 21.5 | 13.3 | 5.9 | 1.1 |
| Average night temperature (°C) | -6.1 | -3.1 | 2.3 | 6.7 | 12.1 | 17.4 | 21.5 | 21.9 | 18.0 | 8.4 | 1.3 | -2.5 |
| Absolute minimum temperature (°C) | -16.9 | -7.6 | -4.8 | 0.2 | 3.3 | 13.0 | 18.2 | 17.2 | 12.8 | 3.4 | -7.8 | -13.5 |
| 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) | 7.2 | 7.4 | 9.1 | 7.8 | 8.2 | 10.0 | 7.3 | 9.4 | 7.4 | 8.9 | 7.3 | 5.9 |
| Precipitation (mm) | 42 | 8 | 28 | 62 | 111 | 222 | 540 | 368 | 249 | 15 | 65 | 105 |
| Sunny days | 19 | 23 | 23 | 13 | 19 | 11 | 3 | 3 | 8 | 22 | 18 | 18 |
| Rainy days | 6 | 3 | 8 | 17 | 12 | 19 | 28 | 28 | 22 | 9 | 12 | 8 |
| Snow days | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 |
The largest precipitation sum in Iwon is at