Average annual temperature is 12.8 °C
Absolute maximum temperature: 35.1 °C
Absolute minimum temperature: -18.6 °C
Number of sunny days: 182 days
Number of rainy days: 171 days
Number of snow days: 12 days
Look at detailed online map of Heosani
* Weather data for Heosani 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) | 10.6 | 11.3 | 24.4 | 26.4 | 31.8 | 35.1 | 33.7 | 34.6 | 30.5 | 22.4 | 23.5 | 16.5 |
| Average daytime temperature (°C) | 1.8 | 6.5 | 15.6 | 18.7 | 24.4 | 27.5 | 29.5 | 30.2 | 26.3 | 18.9 | 9.8 | 4.2 |
| Average temperature (°C) | -2.9 | 0.9 | 8.5 | 12.6 | 18.4 | 22.4 | 25.5 | 26.0 | 22.2 | 13.7 | 5.1 | 0.2 |
| Average night temperature (°C) | -7.6 | -3.0 | 2.5 | 7.4 | 13.1 | 18.0 | 22.3 | 22.4 | 18.6 | 9.2 | 0.9 | -3.4 |
| Absolute minimum temperature (°C) | -18.6 | -6.6 | -4.1 | 1.3 | 4.9 | 13.9 | 20.0 | 17.1 | 13.2 | 3.6 | -7.8 | -14.4 |
| 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) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 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) | 7.1 | 8.3 | 9.2 | 7.6 | 8.7 | 9.5 | 7.2 | 8.2 | 7.3 | 8.0 | 7.1 | 5.7 |
| Precipitation (mm) | 45 | 1 | 24 | 106 | 131 | 222 | 419 | 367 | 214 | 34 | 103 | 86 |
| Sunny days | 21 | 23 | 20 | 15 | 19 | 11 | 6 | 6 | 8 | 19 | 16 | 18 |
| Rainy days | 5 | 3 | 11 | 15 | 12 | 19 | 25 | 25 | 22 | 12 | 13 | 9 |
| Snow days | 5 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 |
The largest precipitation sum in Heosani is at