Average annual temperature is 13.5 °C
Absolute maximum temperature: 35.0 °C
Absolute minimum temperature: -15.3 °C
Number of sunny days: 185 days
Number of rainy days: 165 days
Number of snow days: 15 days
Look at detailed online map of Tongsŏng
* Weather data for Tongsŏng 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) | 14.0 | 12.3 | 26.0 | 27.7 | 30.0 | 35.0 | 33.7 | 34.8 | 30.9 | 22.9 | 23.7 | 17.6 |
| Average daytime temperature (°C) | 3.6 | 7.2 | 15.8 | 18.7 | 24.0 | 28.5 | 29.3 | 30.8 | 26.6 | 19.9 | 11.4 | 5.7 |
| Average temperature (°C) | -1.0 | 1.6 | 8.9 | 12.8 | 18.4 | 22.9 | 25.5 | 26.4 | 22.6 | 14.8 | 6.8 | 1.8 |
| Average night temperature (°C) | -5.2 | -2.4 | 3.6 | 8.0 | 13.6 | 18.5 | 22.7 | 23.1 | 19.3 | 10.6 | 2.6 | -1.7 |
| Absolute minimum temperature (°C) | -15.3 | -5.8 | -3.4 | 2.0 | 7.1 | 15.3 | 19.4 | 19.1 | 14.8 | 5.5 | -6.2 | -14.6 |
| 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 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| 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) | 7.3 | 7.8 | 9.2 | 7.8 | 8.3 | 9.9 | 7.1 | 9.0 | 7.1 | 8.5 | 6.9 | 5.2 |
| Precipitation (mm) | 24 | 3 | 28 | 66 | 150 | 179 | 474 | 253 | 349 | 14 | 53 | 93 |
| Sunny days | 19 | 24 | 23 | 15 | 16 | 13 | 3 | 4 | 12 | 23 | 17 | 16 |
| Rainy days | 5 | 3 | 8 | 15 | 15 | 17 | 28 | 27 | 18 | 8 | 13 | 8 |
| Snow days | 7 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
The best time to visit Tongsŏng during the most sunny months:
The largest precipitation sum in Tongsŏng is at