Average annual temperature is 14.4 °C
Absolute maximum temperature: 35.5 °C
Absolute minimum temperature: -12.4 °C
Number of sunny days: 183 days
Number of rainy days: 176 days
Number of snow days: 6 days
Look at detailed online map of Chwayŏn
* Weather data for Chwayŏn 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) | 17.2 | 14.4 | 23.8 | 28.4 | 28.7 | 31.7 | 34.6 | 35.5 | 31.1 | 24.3 | 26.4 | 18.8 |
| Average daytime temperature (°C) | 7.0 | 10.6 | 17.2 | 19.2 | 22.7 | 27.4 | 29.3 | 30.9 | 27.3 | 21.6 | 14.5 | 9.1 |
| Average temperature (°C) | 1.3 | 4.3 | 10.5 | 13.4 | 17.6 | 22.2 | 25.4 | 26.7 | 22.9 | 15.6 | 8.8 | 3.8 |
| Average night temperature (°C) | -3.1 | -0.4 | 5.4 | 8.5 | 13.7 | 18.3 | 22.6 | 23.6 | 19.4 | 10.7 | 3.9 | -0.3 |
| Absolute minimum temperature (°C) | -12.4 | -5.8 | -3.3 | 1.0 | 6.8 | 14.9 | 18.7 | 21.8 | 16.0 | 5.6 | -4.8 | -9.4 |
| 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) | 7.6 | 7.7 | 8.7 | 7.8 | 7.7 | 8.7 | 7.0 | 9.8 | 7.5 | 8.6 | 8.1 | 7.1 |
| Precipitation (mm) | 62 | 42 | 71 | 101 | 244 | 202 | 325 | 331 | 267 | 9 | 41 | 73 |
| Sunny days | 25 | 19 | 21 | 15 | 13 | 9 | 3 | 4 | 8 | 24 | 23 | 19 |
| Rainy days | 5 | 9 | 10 | 15 | 18 | 21 | 28 | 27 | 22 | 7 | 6 | 8 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 |
The largest precipitation sum in Chwayŏn is at