🇰🇷 Weather in Seongnam-si
Map Overlays:
Hourly Forecast for Seongnam-si
18:00
26°
53%
19:00
24°
62%
20:00
23°
34%
21:00
23°
20%
22:00
23°
24%
23:00
22°
38%
00:00
22°
52%
01:00
22°
72%
02:00
22°
59%
03:00
22°
68%
04:00
22°
68%
05:00
21°
52%
06:00
21°
24%
07:00
23°
60%
08:00
24°
20%
09:00
24°
29%
10:00
26°
19%
11:00
26°
19%
12:00
29°
36%
13:00
28°
53%
14:00
28°
36%
15:00
28°
57%
16:00
28°
59%
17:00
28°
45%
14-Day Forecast for Seongnam-si
2026-07-09
Light rain shower
28° /
22°
2026-07-10
Patchy rain nearby
29° /
21°
2026-07-11
Sunny
32° /
23°
2026-07-12
Sunny
35° /
25°
2026-07-13
Partly Cloudy
35° /
26°
2026-07-14
Partly Cloudy
35° /
26°
2026-07-15
Patchy rain nearby
32° /
25°
Additional Forecasts for Seongnam-si
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 187.0 μg/m³
O₃ (Ozone) 20.0 μg/m³
NO₂ (Nitrogen Dioxide) 42.6 μg/m³
SO₂ (Sulphur Dioxide) 15.0 μg/m³
PM2.5 (Fine particles) 7.9 μg/m³
PM10 (Coarse particles) 8.0 μg/m³
Historical Weather
Weather Forecasts for Other Cities in South Korea
Weather in Seongnam-si — FAQ
Answers refreshed each request based on current conditions in Seongnam-si.
What is the weather like right now in Seongnam-si?
Right now in Seongnam-si, South Korea the temperature is 24.1°C (feels like 25.9°C), with partly cloudy. Relative humidity is 89% and wind is 10.1 km/h.
What is today's high and low temperature in Seongnam-si?
Today's forecast high in Seongnam-si is 27.7°C and the overnight low is 22.3°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Seongnam-si today?
The chance of precipitation in Seongnam-si today is 90%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Seongnam-si differ from nearby cities?
Even short distances can change temperatures noticeably. Seongnam-si's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.