Average annual temperature is 12.5 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: -18.0 °C
Number of sunny days: 184 days
Number of rainy days: 161 days
Number of snow days: 20 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) | 12.7 | 11.9 | 25.0 | 24.1 | 30.9 | 31.9 | 33.6 | 34.2 | 29.7 | 21.5 | 23.2 | 16.3 |
| Average daytime temperature (°C) | 2.1 | 6.9 | 15.2 | 17.7 | 23.2 | 27.0 | 29.4 | 30.2 | 26.1 | 18.6 | 10.2 | 4.3 |
| Average temperature (°C) | -2.5 | 1.2 | 8.4 | 11.7 | 17.7 | 21.9 | 25.1 | 25.7 | 21.5 | 13.1 | 5.3 | 0.1 |
| Average night temperature (°C) | -6.8 | -2.8 | 2.4 | 6.3 | 12.3 | 17.3 | 21.7 | 22.3 | 17.9 | 8.5 | 0.8 | -3.2 |
| Absolute minimum temperature (°C) | -18.0 | -6.9 | -5.1 | -0.6 | 4.0 | 13.5 | 18.0 | 16.0 | 12.2 | 3.1 | -7.9 | -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 | 9.7 |
| 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) | 7.1 | 7.9 | 9.3 | 8.2 | 8.9 | 9.9 | 7.6 | 9.1 | 7.4 | 8.4 | 7.4 | 6.1 |
| Precipitation (mm) | 30 | 4 | 27 | 86 | 125 | 166 | 542 | 306 | 228 | 22 | 69 | 78 |
| Sunny days | 18 | 22 | 23 | 15 | 20 | 9 | 5 | 7 | 10 | 21 | 16 | 18 |
| Rainy days | 4 | 2 | 8 | 15 | 11 | 21 | 26 | 24 | 20 | 10 | 12 | 8 |
| Snow days | 9 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
The largest precipitation sum in Ansan is at