Average annual temperature is 12.7 °C
Absolute maximum temperature: 35.4 °C
Absolute minimum temperature: -18.2 °C
Number of sunny days: 189 days
Number of rainy days: 165 days
Number of snow days: 11 days
Look at detailed online map of Chŏjam
* Weather data for Chŏjam 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) | 12.1 | 9.8 | 23.3 | 27.2 | 30.2 | 35.4 | 33.6 | 33.8 | 30.9 | 22.2 | 23.4 | 16.1 |
| Average daytime temperature (°C) | 2.0 | 6.2 | 14.9 | 18.4 | 23.8 | 26.8 | 29.3 | 29.8 | 26.3 | 19.1 | 9.8 | 4.4 |
| Average temperature (°C) | -3.0 | 0.6 | 7.9 | 12.4 | 18.1 | 22.1 | 25.7 | 26.0 | 22.3 | 14.1 | 5.2 | 0.1 |
| Average night temperature (°C) | -7.8 | -3.8 | 2.2 | 7.4 | 13.2 | 18.1 | 22.8 | 22.9 | 19.0 | 9.5 | 1.0 | -3.9 |
| Absolute minimum temperature (°C) | -18.2 | -6.8 | -4.3 | 1.1 | 6.2 | 14.0 | 19.7 | 19.0 | 11.8 | 3.8 | -7.3 | -14.3 |
| 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 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| 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 | 8.2 | 9.1 | 7.5 | 8.8 | 9.2 | 7.4 | 8.3 | 7.4 | 8.1 | 6.9 | 6.0 |
| Precipitation (mm) | 34 | 1 | 18 | 95 | 153 | 186 | 453 | 302 | 165 | 31 | 111 | 76 |
| Sunny days | 19 | 26 | 24 | 13 | 22 | 9 | 7 | 8 | 7 | 18 | 17 | 19 |
| Rainy days | 6 | 1 | 7 | 17 | 9 | 21 | 24 | 23 | 23 | 13 | 12 | 9 |
| Snow days | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
The largest precipitation sum in Chŏjam is at