Rank 75 · South Korea

Seoul

South Korea · metro
6.4
HECI score
D
Class D
Marginal

Component breakdown

Air Quality
PM2.5 as US AQI, annual means over the window
6.5
Fair
Climate
Apparent temperature, 18-24°C optimal
5.0
Poor
Wind
Daily maximum gusts, calm is comfortable
8.8
Good
UV Safety
Hazardous UV peaks penalized, low UV is not
9.0
Optimal
Day-Night Swing
Daily max-min gap, mild swings score high
8.8
Good
Seasons
Distinct but gentle seasons score highest
2.8
Severe
Sunlight
Annual sunshine hours
7.0
Good
Rainfall
Volume and year-to-year reliability
8.5
Good
Disaster Risk
Recorded events, 3 yr / 50 km
7.6
Good

Goldilocks curve

Cold18-24°CHot

Seoul sits on the cold slope: mean feels-like 10.8°C.

Air quality source

Ground monitor

This city's air quality is measured by a real monitoring station: OpenAQ ground monitor (0.3km).

Coordinates37.5665, 126.978
Data window10y
Updated7/13/2026
Sources: Open-Meteo, OpenAQ ground monitor (0.3km), USGS Earthquakes, NOAA IBTrACS, Smithsonian GVP, GloFAS (Copernicus)