Average annual temperature is 14.9 °C
Absolute maximum temperature: 35.0 °C
Absolute minimum temperature: -9.7 °C
Number of sunny days: 173 days
Number of rainy days: 181 days
Number of snow days: 11 days
Look at detailed online map of Sillyong
* Weather data for Sillyong 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) | 15.3 | 13.4 | 23.4 | 24.7 | 24.8 | 28.3 | 31.2 | 35.0 | 30.8 | 24.1 | 24.5 | 19.3 |
| Average daytime temperature (°C) | 6.6 | 8.8 | 15.5 | 17.4 | 21.0 | 25.3 | 28.0 | 30.4 | 27.5 | 21.5 | 14.1 | 9.0 |
| Average temperature (°C) | 2.8 | 3.9 | 10.1 | 13.3 | 17.5 | 21.8 | 25.2 | 27.0 | 23.9 | 16.9 | 10.3 | 5.5 |
| Average night temperature (°C) | -0.9 | 0.6 | 6.1 | 9.9 | 14.8 | 19.2 | 23.2 | 24.1 | 21.1 | 13.1 | 6.6 | 2.2 |
| Absolute minimum temperature (°C) | -9.7 | -3.1 | -0.3 | 5.1 | 9.9 | 16.1 | 21.0 | 20.1 | 16.1 | 8.8 | -1.3 | -7.8 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.4 | 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) | 7.5 | 7.2 | 8.6 | 8.0 | 7.5 | 8.4 | 6.5 | 10.7 | 8.7 | 8.7 | 7.6 | 6.0 |
| Precipitation (mm) | 44 | 53 | 38 | 160 | 282 | 265 | 413 | 187 | 132 | 26 | 77 | 77 |
| Sunny days | 19 | 18 | 20 | 15 | 15 | 11 | 3 | 6 | 9 | 20 | 20 | 17 |
| Rainy days | 7 | 9 | 11 | 15 | 16 | 19 | 28 | 25 | 21 | 11 | 9 | 10 |
| Snow days | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 |
The best time to visit Sillyong during the most sunny months:
The largest precipitation sum in Sillyong is at