Average annual temperature is 13.2 °C
Absolute maximum temperature: 34.6 °C
Absolute minimum temperature: -16.4 °C
Number of sunny days: 189 days
Number of rainy days: 168 days
Number of snow days: 8 days
Look at detailed online map of Yachon
* Weather data for Yachon 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) | 13.1 | 11.0 | 25.5 | 27.4 | 32.0 | 34.6 | 33.5 | 34.1 | 30.8 | 22.3 | 23.8 | 17.5 |
| Average daytime temperature (°C) | 2.9 | 6.9 | 15.8 | 19.3 | 24.9 | 27.8 | 29.7 | 30.5 | 26.6 | 19.5 | 10.8 | 5.2 |
| Average temperature (°C) | -2.1 | 1.2 | 8.6 | 13.1 | 18.7 | 22.5 | 25.8 | 26.2 | 22.5 | 14.2 | 6.0 | 1.1 |
| Average night temperature (°C) | -7.1 | -3.2 | 2.7 | 7.9 | 13.3 | 18.1 | 22.7 | 22.7 | 19.1 | 9.6 | 1.3 | -2.5 |
| Absolute minimum temperature (°C) | -16.4 | -6.6 | -3.7 | 1.1 | 5.8 | 14.3 | 20.2 | 16.9 | 12.7 | 3.8 | -7.2 | -13.6 |
| 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 | 13.1 | 14.1 | 14.7 | 14.4 | 13.5 | 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 | 8.0 | 9.2 | 7.8 | 8.5 | 9.6 | 7.4 | 8.4 | 7.2 | 8.2 | 7.1 | 5.9 |
| Precipitation (mm) | 32 | 1 | 21 | 69 | 140 | 123 | 468 | 300 | 212 | 18 | 96 | 81 |
| Sunny days | 20 | 24 | 24 | 14 | 18 | 12 | 4 | 8 | 9 | 21 | 17 | 18 |
| Rainy days | 8 | 4 | 7 | 16 | 13 | 18 | 27 | 23 | 21 | 10 | 13 | 8 |
| Snow days | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 |
The largest precipitation sum in Yachon is at