Average annual temperature is 13.0 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -14.6 °C
Number of sunny days: 192 days
Number of rainy days: 160 days
Number of snow days: 13 days
Look at detailed online map of Iljichon
* Weather data for Iljichon 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) | 12.3 | 9.8 | 23.0 | 26.3 | 29.8 | 34.3 | 33.4 | 34.5 | 30.1 | 22.4 | 23.0 | 17.3 |
| Average daytime temperature (°C) | 2.4 | 5.1 | 13.6 | 17.8 | 23.3 | 26.1 | 29.0 | 29.7 | 26.0 | 19.4 | 10.8 | 5.2 |
| Average temperature (°C) | -1.2 | 1.2 | 7.8 | 12.4 | 17.9 | 21.6 | 25.2 | 25.7 | 22.2 | 14.6 | 6.9 | 1.3 |
| Average night temperature (°C) | -5.3 | -2.0 | 3.4 | 8.4 | 13.7 | 18.3 | 22.5 | 22.4 | 18.9 | 10.1 | 2.8 | -2.4 |
| Absolute minimum temperature (°C) | -14.6 | -4.2 | -2.1 | 3.8 | 7.2 | 15.5 | 19.4 | 18.5 | 12.7 | 4.3 | -4.8 | -12.9 |
| 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 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.7 | 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) | 7.2 | 8.4 | 9.4 | 7.8 | 8.6 | 9.6 | 7.5 | 8.8 | 7.4 | 8.2 | 6.7 | 4.8 |
| Precipitation (mm) | 33 | 1 | 15 | 68 | 118 | 160 | 389 | 232 | 183 | 23 | 92 | 80 |
| Sunny days | 20 | 26 | 24 | 17 | 19 | 14 | 7 | 8 | 7 | 21 | 15 | 14 |
| Rainy days | 6 | 2 | 7 | 13 | 12 | 16 | 24 | 23 | 23 | 10 | 15 | 9 |
| Snow days | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 |
The largest precipitation sum in Iljichon is at