Average annual temperature is 12.6 °C
Absolute maximum temperature: 33.9 °C
Absolute minimum temperature: -16.8 °C
Number of sunny days: 185 days
Number of rainy days: 169 days
Number of snow days: 11 days
Look at detailed online map of Siheung
* Weather data for Siheung 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 | 9.9 | 22.2 | 25.0 | 27.8 | 32.0 | 33.6 | 33.9 | 31.1 | 22.3 | 23.1 | 16.1 |
| Average daytime temperature (°C) | 2.1 | 5.3 | 12.9 | 17.2 | 22.4 | 25.2 | 29.0 | 29.6 | 26.2 | 19.3 | 10.1 | 4.8 |
| Average temperature (°C) | -2.0 | 0.9 | 7.3 | 12.1 | 17.3 | 21.3 | 25.4 | 25.8 | 22.3 | 14.4 | 5.5 | 0.6 |
| Average night temperature (°C) | -6.1 | -2.8 | 2.6 | 8.1 | 13.2 | 18.2 | 22.6 | 22.7 | 19.0 | 9.9 | 1.3 | -3.3 |
| Absolute minimum temperature (°C) | -16.8 | -5.7 | -2.2 | 2.6 | 6.6 | 14.4 | 20.5 | 18.7 | 13.2 | 4.7 | -7.0 | -14.0 |
| 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) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| 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 | 8.6 | 9.5 | 7.7 | 8.9 | 9.4 | 7.8 | 8.8 | 7.5 | 8.2 | 7.2 | 6.1 |
| Precipitation (mm) | 44 | 2 | 20 | 93 | 168 | 213 | 391 | 294 | 172 | 42 | 146 | 80 |
| Sunny days | 19 | 25 | 24 | 15 | 21 | 12 | 3 | 6 | 8 | 19 | 16 | 17 |
| Rainy days | 7 | 3 | 7 | 15 | 10 | 18 | 28 | 25 | 22 | 12 | 13 | 9 |
| Snow days | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 5 |
The largest precipitation sum in Siheung is at