South Korea · Asia/Seoul
Hongcheon air quality
AQI estimate unavailable
CAMS model-based US AQI estimate
Complete eligible model windows are not available within the stale policy; pollutant concentrations are shown below.
Model values for Oct 31 15:00 KST · CAMS model estimate, may differ from monitoring stations and street-level conditions
Data may be delayed · Page generated 2026-10-31 15:22 KST
AirNow by Skymory is an independent service; it is not affiliated with or endorsed by U.S. EPA or the official AirNow service.
Pollutants now (modeled)
- PM2.5Fine particles5.0 µg/m³
- PM10Coarse particles5.8 µg/m³
- O3Ozone83.7 µg/m³
- NO2Nitrogen dioxide7.3 µg/m³
- SO2Sulphur dioxide4.5 µg/m³
- COCarbon monoxide176.6 µg/m³
Weather in Hongcheon
See the temperature, rain and wind forecast for Hongcheon.
Hongcheon weather forecast on SkymoryNext 24 hours: PM2.5
Pollutant forecast
Hourly model samples in local time; no interpolation.
| Local time | PM2.5 µg/m³ | PM10 µg/m³ | O3 µg/m³ | NO2 µg/m³ | SO2 µg/m³ | CO µg/m³ |
|---|---|---|---|---|---|---|
| 4.8 | 5.5 | 78.7 | 8.9 | 4.8 | 179.4 | |
| 5.3 | 5.9 | 67.5 | 14.9 | 5.3 | 191.5 | |
| 7.0 | 7.6 | 39.9 | 35.3 | 6.2 | 231.9 | |
| 9.5 | 10.1 | 15.0 | 57.9 | 7.8 | 280.2 | |
| 11.5 | 12.2 | 4.6 | 67.3 | 9.4 | 315.0 | |
| 13.2 | 14.0 | 3.2 | 67.5 | 11.0 | 342.5 | |
| 14.4 | 15.5 | 3.8 | 65.7 | 12.4 | 363.6 | |
| 15.6 | 16.7 | 3.5 | 65.4 | 13.6 | 381.5 | |
| 16.3 | 17.4 | 4.2 | 62.8 | 13.8 | 391.1 | |
| 16.6 | 17.7 | 4.8 | 59.9 | 13.4 | 391.3 | |
| 16.8 | 17.9 | 5.3 | 57.2 | 13.1 | 385.1 | |
| 16.5 | 17.6 | 5.9 | 55.6 | 12.8 | 365.4 | |
| 16.8 | 17.8 | 6.1 | 54.5 | 12.7 | 358.6 | |
| 17.1 | 18.1 | 6.3 | 53.6 | 12.6 | 353.1 | |
| 17.4 | 18.5 | 6.4 | 52.6 | 12.6 | 352.6 | |
| 18.7 | 19.8 | 6.2 | 53.0 | 13.5 | 368.0 | |
| 20.8 | 22.1 | 6.9 | 52.0 | 14.8 | 413.8 | |
| 21.9 | 23.6 | 8.5 | 51.9 | 14.5 | 368.5 | |
| 22.6 | 24.9 | 14.4 | 46.5 | 14.2 | 320.2 | |
| 26.3 | 31.5 | 22.1 | 40.8 | 13.7 | 286.1 | |
| 28.3 | 35.1 | 30.6 | 36.6 | 12.8 | 259.5 | |
| 23.9 | 29.4 | 36.4 | 33.9 | 11.8 | 245.8 | |
| 19.5 | 24.2 | 49.4 | 28.4 | 9.7 | 225.8 | |
| 16.4 | 20.0 | 56.8 | 25.6 | 7.7 | 210.8 |
Data details: about this air quality estimate
Values are modeled by the Copernicus Atmosphere Monitoring Service (CAMS) global forecast, extracted and converted by Skymory for this city. They are model estimates on a coarse grid, not measurements from monitoring stations, and they do not resolve street-level exposure.
- Model initialization: 2026-10-30T12:00:00+00:00. Values valid: Oct 31 15:00 KST. Retrieved: 2026-10-31T03:38:04.514698+00:00.
- Page generated from a snapshot with data state STALE_USABLE; model age 18.4 hours at generation.
- Nearest valid 0.4° model grid cell, about 14 km from the city point.
- Gases are converted with matching model-level 137 temperature, humidity, surface pressure (lnsp) and hybrid coefficients; particulate matter is read directly from the surface fields.
- AQI estimate completeness: UNAVAILABLE (COMPLETE means all six pollutants have a complete model window).
The AQI estimate applies EPA breakpoints (May 2026) to explicit trailing model windows (PM 24 h, CO 8 h, NO2 1 h, SO2 and O3 per EPA rules). It is not a station observation, official daily maximum or NowCast, and the official AQI field remains unavailable.
Surface compatibility by pollutant
| Pollutant | Surface compatibility |
|---|---|
| PM2.5 | DIRECT_SURFACE |
| PM10 | DIRECT_SURFACE |
| O3 | DERIVABLE_SURFACE |
| NO2 | DERIVABLE_SURFACE |
| SO2 | DERIVABLE_SURFACE |
| CO | DERIVABLE_SURFACE |
Source and license
Contains modified Copernicus Atmosphere Monitoring Service information 2026; city extraction and concentration conversion. CAMS global atmospheric composition forecasts (ECMWF/CAMS). CC BY 4.0.
Provider times stay separate from page generation: collecting data or regenerating this page never resets the source time. Data sources and methodology
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