Average annual temperature is 14.8 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -11.7 °C
Number of sunny days: 202 days
Number of rainy days: 159 days
Number of snow days: 4 days
Look at detailed online map of Tondaesan
* Weather data for Tondaesan 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) | 16.8 | 15.4 | 24.4 | 28.9 | 30.8 | 35.6 | 35.0 | 36.5 | 31.1 | 24.5 | 26.3 | 19.0 |
| Average daytime temperature (°C) | 7.3 | 10.6 | 18.2 | 20.0 | 24.0 | 29.3 | 30.0 | 31.4 | 27.5 | 21.9 | 14.8 | 9.1 |
| Average temperature (°C) | 1.2 | 4.3 | 11.0 | 13.9 | 18.4 | 23.4 | 25.8 | 27.1 | 23.2 | 15.8 | 8.9 | 3.8 |
| Average night temperature (°C) | -3.1 | -0.5 | 5.1 | 8.6 | 14.0 | 18.9 | 22.8 | 23.8 | 19.8 | 10.5 | 4.1 | -0.2 |
| Absolute minimum temperature (°C) | -11.7 | -5.0 | -4.2 | 1.7 | 7.8 | 15.0 | 18.8 | 21.7 | 15.6 | 4.8 | -4.2 | -8.6 |
| 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 | 7.6 | 8.6 | 7.9 | 7.7 | 9.1 | 7.0 | 9.6 | 7.7 | 8.6 | 8.1 | 6.9 |
| Precipitation (mm) | 51 | 27 | 73 | 79 | 186 | 180 | 250 | 364 | 232 | 9 | 64 | 75 |
| Sunny days | 25 | 20 | 21 | 17 | 14 | 14 | 5 | 6 | 9 | 24 | 24 | 23 |
| Rainy days | 5 | 8 | 10 | 13 | 17 | 16 | 26 | 25 | 21 | 7 | 5 | 6 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The largest precipitation sum in Tondaesan is at