South Korea · Asia/Seoul
Cheongju 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 particles4.6 µg/m³
- PM10Coarse particles5.3 µg/m³
- O3Ozone79.1 µg/m³
- NO2Nitrogen dioxide12.8 µg/m³
- SO2Sulphur dioxide7.6 µg/m³
- COCarbon monoxide171.1 µg/m³
Weather in Cheongju
See the temperature, rain and wind forecast for Cheongju.
Cheongju 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 |
|---|---|---|---|---|---|---|
| 4.3 | 4.5 | 75.5 | 15.3 | 7.9 | 176.8 | |
| 5.0 | 5.3 | 62.9 | 23.8 | 8.9 | 195.1 | |
| 7.2 | 7.5 | 32.3 | 46.6 | 10.6 | 241.3 | |
| 10.5 | 10.8 | 7.4 | 67.4 | 12.8 | 293.6 | |
| 13.4 | 13.8 | 0.5 | 72.2 | 15.4 | 334.8 | |
| 16.4 | 16.9 | 0.0 | 71.0 | 18.5 | 377.5 | |
| 19.7 | 20.3 | 0.0 | 69.4 | 22.3 | 433.1 | |
| 22.4 | 23.4 | 0.0 | 67.4 | 25.1 | 488.9 | |
| 24.0 | 25.1 | 0.0 | 66.4 | 25.9 | 516.5 | |
| 25.2 | 26.3 | 0.0 | 64.4 | 25.6 | 533.3 | |
| 25.8 | 27.0 | 0.0 | 62.9 | 25.3 | 537.4 | |
| 26.0 | 27.2 | 0.0 | 61.8 | 25.0 | 531.6 | |
| 26.1 | 27.2 | 0.0 | 61.9 | 24.6 | 519.8 | |
| 26.0 | 27.2 | 0.0 | 61.5 | 24.1 | 497.3 | |
| 26.5 | 27.7 | 0.0 | 58.5 | 21.9 | 496.7 | |
| 28.9 | 30.2 | 0.1 | 56.1 | 22.5 | 540.5 | |
| 31.7 | 33.2 | 0.7 | 53.9 | 22.4 | 603.7 | |
| 30.5 | 31.8 | 2.2 | 53.5 | 20.0 | 493.2 | |
| 29.6 | 30.8 | 3.4 | 52.2 | 18.2 | 416.1 | |
| 27.1 | 28.3 | 6.3 | 51.5 | 16.3 | 356.4 | |
| 25.2 | 26.5 | 9.1 | 51.1 | 14.8 | 328.8 | |
| 23.7 | 25.1 | 12.0 | 48.9 | 13.4 | 318.6 | |
| 22.6 | 24.3 | 12.2 | 48.3 | 12.4 | 318.6 | |
| 22.2 | 23.9 | 11.6 | 47.7 | 11.9 | 327.3 |
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 21 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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