Average annual temperature is 8.0 °C
Absolute maximum temperature: 29.7 °C
Absolute minimum temperature: -30.5 °C
Number of sunny days: 165 days
Number of rainy days: 181 days
Number of snow days: 19 days
Look at detailed online map of Ŏnwi
* Weather data for Ŏnwi 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) | 7.5 | 7.1 | 17.8 | 20.5 | 24.0 | 28.4 | 29.6 | 29.7 | 26.6 | 17.7 | 18.3 | 10.1 |
| Average daytime temperature (°C) | -4.0 | 1.6 | 9.9 | 12.7 | 18.4 | 22.3 | 25.4 | 25.2 | 21.9 | 14.6 | 4.7 | -1.3 |
| Average temperature (°C) | -9.0 | -3.6 | 3.7 | 7.5 | 13.5 | 17.7 | 21.5 | 21.3 | 17.7 | 9.8 | 0.2 | -5.0 |
| Average night temperature (°C) | -14.5 | -7.5 | -1.4 | 3.1 | 9.0 | 13.7 | 18.5 | 18.1 | 14.5 | 5.8 | -3.5 | -8.2 |
| Absolute minimum temperature (°C) | -30.5 | -11.8 | -9.2 | -3.9 | 3.5 | 10.4 | 15.5 | 14.4 | 8.0 | -0.6 | -13.3 | -21.2 |
| 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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 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 | 8.5 | 9.5 | 7.2 | 9.3 | 9.7 | 8.1 | 7.7 | 7.7 | 8.3 | 6.6 | 5.8 |
| Precipitation (mm) | 59 | 2 | 24 | 137 | 156 | 210 | 387 | 328 | 131 | 25 | 123 | 106 |
| Sunny days | 19 | 23 | 22 | 12 | 14 | 6 | 5 | 4 | 10 | 16 | 16 | 18 |
| Rainy days | 4 | 0 | 9 | 18 | 17 | 24 | 26 | 27 | 20 | 15 | 12 | 9 |
| Snow days | 8 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
The largest precipitation sum in Ŏnwi is at