Average annual temperature is 13.6 °C
Absolute maximum temperature: 35.0 °C
Absolute minimum temperature: -14.3 °C
Number of sunny days: 189 days
Number of rainy days: 171 days
Number of snow days: 5 days
Look at detailed online map of Sayŏn
* Weather data for Sayŏn 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) | 14.9 | 14.2 | 23.1 | 26.7 | 29.1 | 32.0 | 33.3 | 35.0 | 29.5 | 22.2 | 23.4 | 17.8 |
| Average daytime temperature (°C) | 5.3 | 9.1 | 16.7 | 18.4 | 22.1 | 26.7 | 28.6 | 29.9 | 26.2 | 20.0 | 12.8 | 7.4 |
| Average temperature (°C) | 0.2 | 3.3 | 9.9 | 12.7 | 17.0 | 21.6 | 24.8 | 25.9 | 22.1 | 14.4 | 7.5 | 2.7 |
| Average night temperature (°C) | -3.7 | -1.0 | 4.8 | 7.5 | 12.7 | 17.7 | 21.9 | 22.8 | 18.7 | 10.0 | 2.9 | -0.8 |
| Absolute minimum temperature (°C) | -14.3 | -5.8 | -2.8 | 1.5 | 6.1 | 14.2 | 18.2 | 21.2 | 14.0 | 5.6 | -5.9 | -10.6 |
| 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) | 7.8 | 7.8 | 8.9 | 8.2 | 7.9 | 8.8 | 6.9 | 9.0 | 7.6 | 8.7 | 8.0 | 6.9 |
| Precipitation (mm) | 39 | 30 | 66 | 67 | 193 | 181 | 313 | 327 | 245 | 7 | 41 | 61 |
| Sunny days | 24 | 19 | 20 | 14 | 15 | 13 | 4 | 3 | 10 | 24 | 22 | 21 |
| Rainy days | 6 | 8 | 11 | 16 | 16 | 17 | 27 | 28 | 20 | 7 | 7 | 8 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The largest precipitation sum in Sayŏn is at