Average annual temperature is 13.5 °C
Absolute maximum temperature: 35.2 °C
Absolute minimum temperature: -16.4 °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 Heumsil
* Weather data for Heumsil 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) | 12.8 | 13.2 | 23.9 | 26.2 | 33.6 | 34.4 | 34.5 | 35.2 | 30.3 | 22.5 | 24.9 | 17.2 |
| Average daytime temperature (°C) | 3.7 | 8.2 | 17.1 | 19.1 | 24.7 | 29.1 | 30.1 | 30.9 | 26.6 | 19.9 | 11.8 | 5.8 |
| Average temperature (°C) | -1.3 | 2.1 | 9.9 | 12.9 | 18.8 | 23.3 | 25.7 | 26.5 | 22.3 | 14.0 | 6.4 | 1.1 |
| Average night temperature (°C) | -5.4 | -2.6 | 3.4 | 7.0 | 13.1 | 18.5 | 22.3 | 23.0 | 18.5 | 8.9 | 1.4 | -2.9 |
| Absolute minimum temperature (°C) | -16.4 | -6.8 | -3.4 | 0.9 | 3.9 | 15.0 | 18.6 | 19.3 | 13.6 | 4.5 | -7.5 | -12.7 |
| 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) | 7.4 | 7.6 | 9.0 | 8.3 | 8.6 | 9.8 | 7.6 | 9.3 | 7.6 | 8.5 | 7.8 | 6.7 |
| Precipitation (mm) | 26 | 10 | 42 | 52 | 149 | 252 | 425 | 294 | 239 | 10 | 51 | 82 |
| Sunny days | 24 | 22 | 23 | 17 | 18 | 10 | 4 | 8 | 12 | 24 | 18 | 22 |
| Rainy days | 6 | 5 | 8 | 13 | 13 | 20 | 27 | 23 | 18 | 7 | 12 | 7 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The largest precipitation sum in Heumsil is at