Seongnam-si, Gyeonggi-do Climate
South Korea
Pop. 914,832 Elev. 80 m / 262 ft
TZ: Asia/Seoul (UTC+9) ·
Seongnam-si has warm summers with average highs of 88°F (31°C) in July, and frigid winters averaging 19°F (-7°C) in February. Humidity pushes the summer feels-like temperature to 106°F (41°C), while wind chill can drive winter lows to 12°F (-11°C). Rain falls on about 55 days per year (56.9 in / 1445 mm total), with snow on 3 days and 23 in (591 mm) of annual accumulation. The city averages 132 sunny days per year and around 33 thunderstorm days. Ocean water temperatures reach 82°F (28°C) in summer.
| Temperature | 31°C (88°F) high | -7°C (19°F) low |
| Feels like | 41°C (106°F) high | -11°C (12°F) low |
| Rain | 55 days | 1445 mm (56.9 in) /yr |
| Snow | 3 days | 591 mm (23.3 in) /yr |
| Sky | 132 sunny | 33 stormy |
| Wind | 1.2 m/s (2.6 mph) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, May
Sky & Air by Month
Cloud cover (%)
41
Jan 25
Feb 50
Mar 48
Apr 62
May 69
Jun 66
Jul 70
Aug 75
Sep 75
Oct 37
Nov 40
Dec Humidity (%)
62
Jan 54
Feb 58
Mar 63
Apr 72
May 73
Jun 77
Jul 83
Aug 82
Sep 79
Oct 66
Nov 64
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 34 km Gimpo International Airport (GMP)
Ski resort 18 km 곤지암스키장
National park 29 km 북한산국립공원
Mountain peak
(1,579 m) 121 km 계방산
Hospital 0 km 성남시의료원
Hiking trail 6 km [서울둘레길] 8코스 / 장지 • 탄천 코스
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 3°C 37°F | -6°C 21°F | 2 mm 0.1 in | 182 mm7.2 in | 15 |
| February | 3°C 37°F | -7°C 19°F | 1 mm 0.0 in | 39 mm1.5 in | 18 |
| March | 13°C 55°F | 1°C 34°F | 26 mm 1.0 in | 221 mm8.7 in | 14 |
| April | 18°C 65°F | 7°C 44°F | 90 mm 3.5 in | 66 mm2.6 in | 12 |
| May | 22°C 71°F | 12°C 53°F | 97 mm 3.8 in | — | 10 |
| June | 28°C 82°F | 19°C 66°F | 157 mm 6.2 in | — | 4 |
| July | 31°C 88°F | 24°C 75°F | 267 mm 10.5 in | — | 10 |
| August | 31°C 87°F | 24°C 75°F | 264 mm 10.4 in | — | 3 |
| September | 26°C 80°F | 19°C 66°F | 307 mm 12.1 in | — | 2 |
| October | 20°C 68°F | 12°C 54°F | 180 mm 7.1 in | — | 5 |
| November | 13°C 56°F | 2°C 36°F | 15 mm 0.6 in | — | 20 |
| December | 4°C 40°F | -5°C 23°F | 39 mm 1.5 in | 83 mm3.3 in | 19 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 15 | 0 |
| February | 18 | 0 |
| March | 14 | 0 |
| April | 12 | 2 |
| May | 10 | 3 |
| June | 4 | 5 |
| July | 10 | 7 |
| August | 3 | 6 |
| September | 2 | 6 |
| October | 5 | 4 |
| November | 20 | 0 |
| December | 19 | 0 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 6°C 42°F | 0°C 32°F |
| February | 3°C 38°F | 0°C 32°F |
| March | 7°C 45°F | 1°C 34°F |
| April | 13°C 55°F | 9°C 49°F |
| May | 17°C 63°F | 15°C 59°F |
| June | 23°C 74°F | 22°C 71°F |
| July | 27°C 81°F | 28°C 82°F |
| August | 28°C 82°F | 27°C 81°F |
| September | 28°C 82°F | 23°C 74°F |
| October | 23°C 74°F | 17°C 63°F |
| November | 17°C 63°F | 8°C 46°F |
| December | 11°C 52°F | 1°C 34°F |