Average annual temperature is 15.6 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -10.0 °C
Number of sunny days: 193 days
Number of rainy days: 170 days
Number of snow days: 2 days
Look at detailed online map of Iun
* Weather data for Iun 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) | 15.7 | 13.4 | 23.5 | 20.4 | 23.0 | 28.6 | 31.6 | 36.5 | 30.4 | 25.0 | 24.6 | 18.3 |
| Average daytime temperature (°C) | 6.9 | 9.8 | 15.1 | 17.1 | 19.9 | 23.8 | 27.0 | 30.4 | 27.1 | 22.0 | 14.8 | 9.7 |
| Average temperature (°C) | 3.7 | 6.1 | 11.5 | 14.1 | 17.5 | 21.6 | 25.0 | 27.8 | 24.3 | 18.2 | 11.1 | 6.3 |
| Average night temperature (°C) | -0.3 | 2.5 | 7.9 | 11.3 | 15.4 | 19.8 | 23.3 | 25.5 | 21.9 | 14.3 | 7.3 | 2.7 |
| Absolute minimum temperature (°C) | -10.0 | -2.3 | 0.8 | 5.0 | 10.4 | 16.9 | 20.7 | 24.0 | 17.1 | 9.0 | -1.4 | -5.9 |
| 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 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.7 | 7.6 | 8.7 | 8.0 | 7.8 | 8.5 | 7.3 | 9.9 | 7.9 | 8.8 | 8.4 | 7.3 |
| Precipitation (mm) | 67 | 48 | 58 | 107 | 265 | 252 | 419 | 253 | 247 | 10 | 47 | 81 |
| Sunny days | 24 | 20 | 20 | 15 | 12 | 11 | 4 | 9 | 11 | 23 | 22 | 22 |
| Rainy days | 6 | 8 | 11 | 15 | 19 | 19 | 27 | 22 | 19 | 8 | 8 | 8 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The largest precipitation sum in Iun is at