Average annual temperature is 13.4 °C
Absolute maximum temperature: 33.5 °C
Absolute minimum temperature: -13.8 °C
Number of sunny days: 203 days
Number of rainy days: 159 days
Number of snow days: 3 days
Look at detailed online map of Isŏltang
* Weather data for Isŏltang 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) | 12.9 | 13.2 | 22.1 | 24.1 | 30.8 | 31.6 | 33.2 | 33.5 | 28.7 | 25.0 | 25.7 | 18.1 |
| Average daytime temperature (°C) | 4.6 | 6.1 | 12.8 | 16.6 | 21.0 | 24.9 | 28.9 | 28.3 | 24.6 | 20.0 | 13.0 | 6.3 |
| Average temperature (°C) | 0.3 | 2.5 | 8.3 | 12.3 | 17.2 | 21.7 | 25.6 | 25.3 | 21.5 | 15.1 | 8.3 | 2.3 |
| Average night temperature (°C) | -3.5 | -0.8 | 3.8 | 7.9 | 13.2 | 18.3 | 22.7 | 22.7 | 18.7 | 10.7 | 4.2 | -1.0 |
| Absolute minimum temperature (°C) | -13.8 | -4.6 | -1.9 | 3.7 | 7.4 | 15.4 | 19.5 | 16.2 | 11.7 | 6.4 | -5.0 | -11.2 |
| 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 | 14.7 | 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) | 7.2 | 7.4 | 8.5 | 8.5 | 9.3 | 10.5 | 8.4 | 8.3 | 7.2 | 8.1 | 7.4 | 6.3 |
| Precipitation (mm) | 71 | 34 | 20 | 59 | 123 | 120 | 311 | 408 | 219 | 29 | 72 | 143 |
| Sunny days | 24 | 20 | 24 | 14 | 18 | 12 | 10 | 5 | 10 | 19 | 24 | 23 |
| Rainy days | 6 | 6 | 7 | 16 | 13 | 18 | 21 | 26 | 20 | 12 | 6 | 8 |
| Snow days | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Isŏltang during the most sunny months:
The largest precipitation sum in Isŏltang is at