Air Quality in Sejong, South Korea

Windy
15.9°C · 93.0% humidity
15.9°
Feels 15.9°
68
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
8 stations

Nearby Monitoring Stations

AQI Forecast
54 3pm
54
54
68 6pm
64
61
71 9pm
70
86
85 12am
84
84
84 3am
83
83
84 6am
146
84
83 9am
83
66
54 12pm
54
54
AD 728×90

Air Quality Index Trend

48h · 48 stn

Sejong's air quality is influenced by industrial emissions, vehicle traffic, and regional pollution transport. Winter heating season and spring dust events typically create the most challenging air quality conditions. Current PM2.5 concentration in Sejong is 1.4× the WHO 24-hour guideline of 15 µg/m³.

93.0%
Humidity
40.3 km/h
Wind SW
1007.3 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
68
20.44 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Sejong?

Temperature & Precipitation

PM2.5 Trend

48h · 48 stations
PM2.520.44 µg/m³ ×1.4 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
Station readings (8 stations within 25 km)
20.44
Median
20.06
Average
17.8
Low
24.5
High
PM2.5 µg/m³ · Model: 13.5 · Bias: -6.9

What is the 7-day forecast for Sejong?

05-30
21.3° 15.9°
05-31
27.8° 16.8°
0.31 mm
06-01
31.5° 15.9°
06-02
29.8° 19.3°
06-03
22.2° 14.1°
2.75 mm
06-04
26.0° 14.7°
3.37 mm
06-05
30.1° 15.8°
0.06 mm
Both models agree Avg diff: 3.5°C

Where are air quality stations near Sejong?

63
Sinheung-dong, Sejong, South Korea (신흥동)
0.1 km PM2.5: 17.8 µg/m³
63
Sinheung-dong, Sejong, South Korea (신흥동)
0.1 km PM2.5: 17.8 µg/m³
12
Sinheung-dong, Sejong, South Korea (신흥동)
0.1 km PM2.5: 2.9 µg/m³
90
Osong-eup, Chungbuk, South Korea (오송읍 충북)
5.5 km PM2.5: 30.6 µg/m³
63
Osong-eup, Chungbuk, South Korea (오송읍 충북)
5.5 km PM2.5: 17.8 µg/m³
73
Osong-eup, Chungbuk, South Korea (오송읍 충북)
5.5 km PM2.5: 22.6 µg/m³
88
Osong-eup, Chungbuk, South Korea (오송읍 충북)
5.5 km PM2.5: 29.7 µg/m³
38
Areum-dong, Sejong, South Korea (아름동)
9.8 km PM2.5: 9.1 µg/m³
57
Areum-dong, Sejong, South Korea (아름동)
9.8 km PM2.5: 15.0 µg/m³
74
Areum-dong, Sejong, South Korea (아름동)
9.8 km PM2.5: 23.0 µg/m³

What cities are near Sejong?

68 Cheongju-si 67 Gongju 64 Cheonan 68 Daejeon 80 Chinch'ŏn 65 Asan 75 Jungpyong 71 Seonghwan 63 Okcheon 71 Yesan
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-30T09:09 UTC.