Average annual temperature is 14.2 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -13.9 °C
Number of sunny days: 166 days
Number of rainy days: 184 days
Number of snow days: 15 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) | 15.5 | 12.0 | 22.8 | 25.1 | 29.3 | 34.5 | 32.1 | 34.1 | 30.6 | 22.9 | 24.5 | 18.6 |
| Average daytime temperature (°C) | 5.6 | 7.8 | 15.9 | 18.8 | 23.4 | 27.9 | 28.9 | 30.6 | 27.0 | 20.4 | 13.1 | 7.8 |
| Average temperature (°C) | 0.8 | 2.5 | 8.9 | 12.9 | 18.0 | 22.5 | 25.6 | 26.5 | 23.0 | 15.5 | 8.8 | 4.0 |
| Average night temperature (°C) | -3.5 | -1.4 | 3.6 | 8.1 | 13.7 | 18.8 | 23.2 | 23.2 | 19.7 | 11.2 | 4.6 | 0.5 |
| Absolute minimum temperature (°C) | -13.9 | -5.1 | -4.1 | 2.0 | 7.5 | 14.9 | 20.0 | 19.2 | 15.5 | 7.4 | -2.4 | -9.9 |
| 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) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 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) | 6.8 | 7.1 | 8.7 | 7.4 | 7.5 | 8.4 | 6.0 | 9.6 | 7.8 | 8.0 | 6.7 | 4.9 |
| Precipitation (mm) | 45 | 22 | 54 | 113 | 183 | 180 | 502 | 227 | 200 | 15 | 89 | 95 |
| Sunny days | 20 | 22 | 23 | 14 | 14 | 16 | 1 | 1 | 8 | 22 | 17 | 8 |
| Rainy days | 6 | 6 | 8 | 16 | 17 | 14 | 30 | 30 | 22 | 9 | 13 | 13 |
| Snow days | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10 |
The best time to visit Yachon during the most sunny months:
The largest precipitation sum in Yachon is at