Average annual temperature is 13.5 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: -15.6 °C
Number of sunny days: 191 days
Number of rainy days: 170 days
Number of snow days: 4 days
Look at detailed online map of Gacheon
* Weather data for Gacheon 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) | 16.4 | 15.8 | 24.2 | 27.3 | 33.5 | 34.2 | 34.9 | 36.4 | 30.1 | 23.1 | 26.2 | 18.6 |
| Average daytime temperature (°C) | 4.6 | 8.6 | 17.2 | 19.0 | 23.1 | 28.5 | 29.6 | 30.6 | 26.0 | 20.4 | 12.7 | 6.5 |
| Average temperature (°C) | -0.8 | 2.6 | 10.0 | 12.8 | 17.4 | 22.6 | 25.3 | 26.1 | 22.0 | 14.7 | 7.1 | 2.0 |
| Average night temperature (°C) | -4.9 | -2.2 | 3.7 | 7.1 | 12.4 | 18.1 | 22.1 | 22.6 | 18.7 | 9.8 | 2.4 | -1.7 |
| Absolute minimum temperature (°C) | -15.6 | -7.3 | -3.5 | 1.3 | 4.4 | 14.6 | 17.5 | 20.6 | 14.5 | 4.7 | -7.0 | -12.0 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.8 | 7.3 | 9.2 | 8.4 | 8.3 | 9.5 | 7.7 | 9.2 | 7.5 | 8.8 | 7.8 | 6.8 |
| Precipitation (mm) | 40 | 20 | 58 | 62 | 151 | 170 | 382 | 264 | 227 | 12 | 52 | 87 |
| Sunny days | 25 | 19 | 21 | 15 | 15 | 11 | 6 | 6 | 7 | 22 | 22 | 22 |
| Rainy days | 4 | 8 | 10 | 15 | 16 | 19 | 25 | 25 | 23 | 9 | 8 | 8 |
| Snow days | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The largest precipitation sum in Gacheon is at