🇰🇷 Weather in Sejong
Map Overlays:
Hourly Forecast for Sejong
13:00
24°
29%
14:00
25°
23%
15:00
26°
17%
16:00
26°
12%
17:00
25°
41%
18:00
24°
46%
19:00
23°
34%
20:00
22°
29%
21:00
21°
27%
22:00
21°
27%
23:00
21°
34%
00:00
21°
32%
01:00
21°
32%
02:00
21°
23%
03:00
21°
22%
04:00
20°
22%
05:00
20°
24%
06:00
21°
22%
07:00
23°
17%
08:00
25°
15%
09:00
26°
13%
10:00
28°
16%
11:00
29°
19%
12:00
30°
17%
14-Day Forecast for Sejong
2026-07-09
Light rain shower
26° /
21°
2026-07-10
Mist
32° /
20°
2026-07-11
Sunny
33° /
21°
2026-07-12
Sunny
35° /
23°
2026-07-13
Sunny
35° /
23°
2026-07-14
Sunny
34° /
24°
2026-07-15
Partly Cloudy
33° /
23°
Additional Forecasts for Sejong
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 167.0 μg/m³
O₃ (Ozone) 44.0 μg/m³
NO₂ (Nitrogen Dioxide) 18.8 μg/m³
SO₂ (Sulphur Dioxide) 4.0 μg/m³
PM2.5 (Fine particles) 6.1 μg/m³
PM10 (Coarse particles) 6.4 μg/m³
Historical Weather
Weather Forecasts for Other Cities in South Korea
Weather in Sejong — FAQ
Answers refreshed each request based on current conditions in Sejong.
What is the weather like right now in Sejong?
Right now in Sejong, South Korea the temperature is 22.2°C (feels like 24.7°C), with light rain. Relative humidity is 94% and wind is 10.8 km/h.
What is today's high and low temperature in Sejong?
Today's forecast high in Sejong is 25.9°C and the overnight low is 20.9°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Sejong today?
The chance of precipitation in Sejong today is 91%. 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 Sejong differ from nearby cities?
Even short distances can change temperatures noticeably. Sejong'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.