Average annual temperature is 12.3 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: -17.8 °C
Number of sunny days: 186 days
Number of rainy days: 163 days
Number of snow days: 16 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) | 11.8 | 10.6 | 23.9 | 25.5 | 30.3 | 33.0 | 33.1 | 34.2 | 30.3 | 21.9 | 22.5 | 15.3 |
| Average daytime temperature (°C) | 1.7 | 6.6 | 14.9 | 17.7 | 23.4 | 26.9 | 29.4 | 29.9 | 26.0 | 18.4 | 9.5 | 3.8 |
| Average temperature (°C) | -2.7 | 0.8 | 8.0 | 11.7 | 17.6 | 21.7 | 25.1 | 25.5 | 21.5 | 12.7 | 4.7 | -0.2 |
| Average night temperature (°C) | -7.0 | -3.3 | 1.6 | 6.3 | 11.9 | 16.9 | 21.5 | 21.6 | 17.6 | 7.8 | 0.3 | -3.7 |
| Absolute minimum temperature (°C) | -17.8 | -6.5 | -5.3 | -0.9 | 1.9 | 13.0 | 18.4 | 15.3 | 10.3 | 3.0 | -8.2 | -14.3 |
| 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 | 14.5 | 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) | 6.9 | 8.2 | 9.2 | 7.7 | 9.2 | 9.5 | 7.9 | 8.6 | 7.6 | 8.0 | 7.0 | 5.9 |
| Precipitation (mm) | 44 | 3 | 23 | 96 | 135 | 216 | 401 | 334 | 166 | 28 | 78 | 84 |
| Sunny days | 19 | 24 | 23 | 13 | 19 | 10 | 7 | 7 | 9 | 21 | 16 | 18 |
| Rainy days | 5 | 2 | 8 | 17 | 12 | 20 | 24 | 24 | 21 | 10 | 12 | 8 |
| Snow days | 7 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
The largest precipitation sum in Ansan is at