Average annual temperature is 12.4 °C
Absolute maximum temperature: 34.1 °C
Absolute minimum temperature: -18.3 °C
Number of sunny days: 184 days
Number of rainy days: 170 days
Number of snow days: 11 days
Look at detailed online map of Ansan
* Weather data for Ansan 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) | 11.4 | 9.9 | 22.1 | 25.3 | 28.3 | 33.9 | 32.7 | 34.1 | 30.9 | 22.6 | 22.4 | 15.3 |
| Average daytime temperature (°C) | 1.6 | 5.9 | 13.9 | 17.5 | 22.9 | 26.6 | 28.9 | 29.4 | 26.3 | 19.0 | 9.2 | 3.9 |
| Average temperature (°C) | -2.9 | 0.5 | 7.5 | 11.9 | 17.5 | 21.8 | 25.3 | 25.7 | 22.2 | 14.2 | 4.8 | 0.0 |
| Average night temperature (°C) | -7.2 | -3.1 | 2.3 | 7.5 | 12.8 | 18.0 | 22.5 | 22.4 | 18.6 | 10.0 | 0.8 | -3.7 |
| Absolute minimum temperature (°C) | -18.3 | -6.8 | -4.1 | 1.1 | 7.0 | 14.3 | 19.5 | 18.1 | 12.0 | 3.9 | -7.6 | -15.0 |
| 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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 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) | 7.1 | 8.4 | 9.0 | 7.1 | 9.4 | 9.2 | 7.6 | 8.2 | 7.8 | 8.4 | 6.9 | 6.3 |
| Precipitation (mm) | 53 | 2 | 21 | 108 | 157 | 229 | 350 | 331 | 125 | 21 | 85 | 68 |
| Sunny days | 19 | 26 | 24 | 14 | 18 | 7 | 5 | 9 | 9 | 18 | 14 | 21 |
| Rainy days | 4 | 2 | 7 | 16 | 13 | 23 | 26 | 22 | 21 | 13 | 14 | 9 |
| Snow days | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 |
The largest precipitation sum in Ansan is at