Average annual temperature is 14.6 °C
Absolute maximum temperature: 35.7 °C
Absolute minimum temperature: -11.2 °C
Number of sunny days: 198 days
Number of rainy days: 164 days
Number of snow days: 3 days
Look at detailed online map of Seisan-ri
* Weather data for Seisan-ri 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 | 14.0 | 24.3 | 27.3 | 27.8 | 33.8 | 33.4 | 35.7 | 30.8 | 23.7 | 26.3 | 18.8 |
| Average daytime temperature (°C) | 7.4 | 10.8 | 17.7 | 19.6 | 23.1 | 27.9 | 29.0 | 31.0 | 27.4 | 21.5 | 14.9 | 9.3 |
| Average temperature (°C) | 1.3 | 4.4 | 10.9 | 13.8 | 18.0 | 22.8 | 25.4 | 27.0 | 23.1 | 15.5 | 9.0 | 3.8 |
| Average night temperature (°C) | -3.5 | -0.7 | 5.2 | 8.9 | 14.0 | 18.8 | 22.7 | 23.8 | 19.8 | 10.7 | 4.3 | -0.5 |
| Absolute minimum temperature (°C) | -11.2 | -5.9 | -3.4 | 1.1 | 7.5 | 15.4 | 18.6 | 21.4 | 14.9 | 5.7 | -4.0 | -9.1 |
| 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) | 7.7 | 7.7 | 8.6 | 7.7 | 7.7 | 8.9 | 6.7 | 9.9 | 7.7 | 8.7 | 8.0 | 7.1 |
| Precipitation (mm) | 54 | 32 | 71 | 96 | 193 | 226 | 355 | 315 | 228 | 9 | 66 | 85 |
| Sunny days | 27 | 19 | 21 | 14 | 10 | 13 | 6 | 8 | 11 | 24 | 25 | 20 |
| Rainy days | 4 | 9 | 10 | 16 | 21 | 17 | 25 | 23 | 19 | 7 | 5 | 8 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The largest precipitation sum in Seisan-ri is at