Average annual temperature is 10.8 °C
Absolute maximum temperature: 32.6 °C
Absolute minimum temperature: -19.7 °C
Number of sunny days: 187 days
Number of rainy days: 163 days
Number of snow days: 15 days
Look at detailed online map of Gachon
* Weather data for Gachon 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) | 8.9 | 9.6 | 20.6 | 24.0 | 28.0 | 32.6 | 32.2 | 32.6 | 29.8 | 21.0 | 21.5 | 12.9 |
| Average daytime temperature (°C) | -0.5 | 4.8 | 12.9 | 16.1 | 21.9 | 25.8 | 28.6 | 28.3 | 25.2 | 17.7 | 7.6 | 1.8 |
| Average temperature (°C) | -5.4 | -0.8 | 6.0 | 10.3 | 16.2 | 20.7 | 24.5 | 24.3 | 20.5 | 12.2 | 3.0 | -2.2 |
| Average night temperature (°C) | -10.5 | -4.6 | -0.1 | 5.3 | 11.0 | 16.0 | 21.3 | 20.9 | 16.9 | 7.5 | -1.0 | -5.8 |
| Absolute minimum temperature (°C) | -19.7 | -8.1 | -6.1 | -1.3 | 3.9 | 11.3 | 18.2 | 15.3 | 9.7 | 1.9 | -9.2 | -17.5 |
| 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) | 9.8 | 10.8 | 12.0 | 13.2 | 14.2 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 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) | 7.0 | 8.4 | 9.4 | 7.4 | 9.3 | 9.4 | 8.4 | 7.8 | 7.8 | 8.2 | 6.3 | 6.0 |
| Precipitation (mm) | 49 | 2 | 17 | 105 | 152 | 181 | 258 | 281 | 105 | 24 | 115 | 74 |
| Sunny days | 20 | 24 | 25 | 12 | 20 | 10 | 5 | 5 | 13 | 20 | 15 | 18 |
| Rainy days | 4 | 0 | 6 | 18 | 11 | 20 | 26 | 26 | 17 | 11 | 13 | 11 |
| Snow days | 7 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 |
The largest precipitation sum in Gachon is at