Average annual temperature is 14.5 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -11.5 °C
Number of sunny days: 160 days
Number of rainy days: 193 days
Number of snow days: 12 days
Look at detailed online map of Illo
* Weather data for Illo 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) | 15.1 | 12.8 | 22.6 | 24.0 | 27.8 | 32.8 | 31.5 | 34.3 | 30.4 | 23.8 | 25.8 | 19.4 |
| Average daytime temperature (°C) | 6.2 | 8.0 | 15.4 | 18.3 | 22.1 | 26.5 | 28.5 | 30.8 | 27.4 | 21.4 | 14.0 | 8.3 |
| Average temperature (°C) | 1.9 | 2.9 | 9.4 | 13.4 | 17.8 | 22.3 | 25.6 | 26.7 | 23.2 | 16.1 | 9.6 | 4.6 |
| Average night temperature (°C) | -2.2 | -0.8 | 4.8 | 9.4 | 14.4 | 19.3 | 23.3 | 23.5 | 20.0 | 11.6 | 5.3 | 0.8 |
| Absolute minimum temperature (°C) | -11.5 | -4.1 | -2.3 | 4.1 | 7.8 | 15.5 | 20.5 | 18.8 | 15.3 | 7.8 | -2.8 | -9.1 |
| 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) | 6.9 | 7.3 | 8.5 | 7.6 | 7.5 | 8.9 | 6.5 | 10.1 | 8.1 | 8.3 | 6.8 | 5.3 |
| Precipitation (mm) | 28 | 30 | 60 | 98 | 213 | 178 | 469 | 197 | 121 | 21 | 66 | 58 |
| Sunny days | 18 | 21 | 23 | 13 | 12 | 12 | 1 | 3 | 7 | 22 | 17 | 11 |
| Rainy days | 10 | 6 | 8 | 17 | 19 | 18 | 30 | 28 | 23 | 9 | 13 | 12 |
| Snow days | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 |
The best time to visit Illo during the most sunny months:
The largest precipitation sum in Illo is at