Average annual temperature is 12.6 °C
Absolute maximum temperature: 33.5 °C
Absolute minimum temperature: -16.2 °C
Number of sunny days: 164 days
Number of rainy days: 187 days
Number of snow days: 14 days
Look at detailed online map of Kosan-myŏn
* Weather data for Kosan-myŏn 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) | 15.1 | 11.3 | 23.0 | 25.2 | 29.3 | 32.6 | 31.6 | 33.5 | 29.9 | 21.6 | 22.8 | 17.2 |
| Average daytime temperature (°C) | 3.1 | 6.6 | 15.0 | 17.6 | 22.3 | 26.5 | 28.0 | 29.3 | 25.7 | 18.5 | 10.6 | 5.3 |
| Average temperature (°C) | -1.4 | 1.1 | 8.2 | 11.8 | 17.1 | 21.2 | 24.3 | 25.1 | 21.5 | 13.7 | 6.3 | 1.6 |
| Average night temperature (°C) | -5.2 | -2.8 | 3.0 | 6.9 | 12.6 | 17.0 | 21.7 | 22.0 | 18.2 | 9.4 | 2.3 | -1.9 |
| Absolute minimum temperature (°C) | -16.2 | -7.6 | -5.0 | -1.5 | 5.7 | 13.0 | 18.2 | 17.9 | 11.8 | 5.3 | -7.4 | -13.7 |
| 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 | 14.6 | 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) | 7.1 | 7.4 | 9.1 | 7.5 | 8.4 | 9.7 | 7.1 | 9.3 | 7.5 | 8.7 | 7.0 | 5.8 |
| Precipitation (mm) | 46 | 10 | 33 | 87 | 200 | 180 | 614 | 375 | 269 | 21 | 87 | 131 |
| Sunny days | 16 | 21 | 22 | 15 | 14 | 10 | 0 | 4 | 8 | 22 | 17 | 15 |
| Rainy days | 7 | 6 | 9 | 15 | 17 | 20 | 31 | 27 | 22 | 9 | 13 | 11 |
| Snow days | 8 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 |
The largest precipitation sum in Kosan-myŏn is at