Common information
CountrySouth Korea
Population1 031 935
Weather, climate, temperature by months in Seongnam-si
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 32 | 30 | 25 | 20 | 17 | 17 | 22 | 28 | 32 | 35 | 37 | 36 | 37 |
| Average high, °C | 25 | 19 | 11 | 4 | 1 | 3 | 10 | 17 | 22 | 26 | 28 | 29 | 16 |
| Average temperature, °C | 20 | 13 | 6 | 0 | -3 | -1 | 5 | 11 | 17 | 22 | 25 | 25 | 12 |
| Average low, °C | 15 | 7 | 1 | -5 | -8 | -5 | 0 | 5 | 11 | 16 | 21 | 21 | 7 |
| Record low, °C | 5 | -3 | -11 | -20 | -22 | 0 | -11 | -2 | 2 | 7 | 7 | 13 | -22 |
| Rain, days | 10 | 8 | 10 | 7 | 4 | 5 | 8 | 11 | 10 | 12 | 18 | 16 | 119 |
| Snow, days | 0 | 0 | 1 | 5 | 8 | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 22 |
| Fog, days | 27 | 28 | 26 | 27 | 25 | 22 | 26 | 25 | 27 | 27 | 27 | 28 | 315 |
| Thunderstorms, days | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 5 | 5 | 18 |
| Average precipitation, mm. | 148 | 55 | 54 | 23 | 25 | 30 | 47 | 92 | 87 | 119 | 336 | 280 | 1296 |
| Relative humidity morning, % | 91 | 89 | 84 | 79 | 75 | 75 | 80 | 83 | 87 | 89 | 92 | 91 | 85 |
| Relative humidity evening, % | 56 | 50 | 54 | 54 | 54 | 52 | 48 | 47 | 49 | 55 | 68 | 63 | 54 |
| Wind speed, km/h | 6 | 6 | 6 | 6 | 9 | 9 | 8 | 8 | 6 | 6 | 6 | 6 | 7 |
| Day Length, часов | 13 | 12 | 11 | 10 | 10 | 11 | 12 | 14 | 15 | 15 | 15 | 14 | 13 |
| Dew point, °C | 15 | 7 | 0 | -5 | -9 | -7 | -1 | 4 | 10 | 16 | 20 | 20 | 70 |
| Growing degree-day, °C | 308 | 112 | 0 | 0 | 0 | 0 | 0 | 50 | 215 | 350 | 465 | 474 | 1974 |
| Solar radiation, global, Mj/m2 | 15 | 13 | 10 | 9 | 10 | 13 | 16 | 20 | 20 | 18 | 14 | 15 | 14 |