Average annual temperature is 13.9 °C
Absolute maximum temperature: 37.0 °C
Absolute minimum temperature: -14.8 °C
Number of sunny days: 187 days
Number of rainy days: 169 days
Number of snow days: 9 days
Look at detailed online map of Summal
* Weather data for Summal 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) | 14.7 | 12.5 | 27.2 | 29.0 | 31.1 | 37.0 | 33.1 | 35.1 | 31.1 | 23.0 | 24.3 | 18.2 |
| Average daytime temperature (°C) | 4.6 | 8.0 | 17.1 | 20.0 | 24.8 | 29.6 | 29.4 | 31.0 | 26.9 | 20.2 | 12.2 | 6.6 |
| Average temperature (°C) | -0.7 | 1.7 | 9.4 | 13.5 | 18.8 | 23.5 | 25.7 | 26.7 | 22.7 | 14.8 | 7.4 | 2.5 |
| Average night temperature (°C) | -5.1 | -2.9 | 3.0 | 7.9 | 13.7 | 18.9 | 22.9 | 23.3 | 19.3 | 10.2 | 2.8 | -1.3 |
| Absolute minimum temperature (°C) | -14.8 | -6.7 | -4.5 | 1.0 | 5.5 | 14.9 | 20.2 | 17.6 | 13.4 | 5.1 | -5.4 | -12.2 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.3 | 7.5 | 9.2 | 7.7 | 8.3 | 10.0 | 7.0 | 9.2 | 7.2 | 8.6 | 7.1 | 5.6 |
| Precipitation (mm) | 33 | 4 | 27 | 83 | 152 | 202 | 555 | 335 | 267 | 13 | 91 | 120 |
| Sunny days | 19 | 21 | 23 | 14 | 15 | 13 | 3 | 8 | 12 | 25 | 17 | 17 |
| Rainy days | 8 | 6 | 8 | 16 | 16 | 17 | 28 | 23 | 18 | 6 | 13 | 10 |
| Snow days | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
The best time to visit Summal during the most sunny months:
The largest precipitation sum in Summal is at