Hong Kong · Asia/Hong_Kong
Hong Kong air quality
105
Unhealthy for sensitive groups
CAMS model-based US AQI estimate
Highest pollutant sub-index: PM2.5
Model values for Oct 02 15:00 HKT · CAMS model estimate, may differ from monitoring stations and street-level conditions
Data may be delayed
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 particles25.6 µg/m³
- PM10Coarse particles25.8 µg/m³
- O3Ozone79.9 µg/m³
- NO2Nitrogen dioxide65.0 µg/m³
- SO2Sulphur dioxide63.7 µg/m³
- COCarbon monoxide405.6 µg/m³
Weather in Hong Kong
See the temperature, rain and wind forecast for Hong Kong.
Hong Kong 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 |
|---|---|---|---|---|---|---|
| 25.1 | 25.3 | 71.4 | 69.5 | 54.2 | 395.3 | |
| 33.2 | 33.3 | 36.9 | 90.2 | 40.5 | 498.9 | |
| 39.8 | 40.0 | 19.0 | 106.0 | 46.7 | 573.1 | |
| 49.9 | 50.0 | 7.0 | 117.6 | 50.4 | 670.1 | |
| 63.4 | 63.9 | 4.4 | 120.1 | 51.5 | 795.6 | |
| 67.4 | 67.8 | 3.5 | 121.5 | 52.2 | 828.3 | |
| 68.5 | 68.9 | 3.1 | 122.8 | 52.1 | 829.3 | |
| 52.5 | 52.7 | 4.2 | 125.9 | 49.2 | 669.0 | |
| 41.6 | 41.7 | 9.2 | 124.4 | 42.5 | 553.5 | |
| 36.1 | 36.2 | 27.5 | 101.8 | 38.5 | 484.8 | |
| 32.1 | 32.3 | 43.7 | 75.3 | 32.3 | 436.8 | |
| 28.8 | 28.9 | 48.0 | 62.2 | 28.8 | 401.1 | |
| 21.8 | 21.9 | 49.0 | 54.6 | 28.2 | 385.7 | |
| 17.6 | 17.7 | 46.1 | 53.3 | 29.6 | 381.1 | |
| 20.7 | 20.9 | 39.5 | 59.1 | 30.8 | 377.7 | |
| 22.4 | 23.0 | 31.0 | 70.1 | 37.1 | 434.3 | |
| 25.0 | 26.0 | 36.2 | 67.6 | 40.6 | 446.6 | |
| 24.1 | 25.2 | 41.7 | 62.6 | 43.1 | 429.2 | |
| 21.4 | 22.3 | 55.9 | 52.7 | 47.9 | 391.1 | |
| 17.8 | 18.3 | 73.5 | 43.1 | 54.5 | 340.5 | |
| 15.8 | 16.1 | 84.4 | 35.6 | 53.7 | 302.3 | |
| 15.7 | 16.2 | 91.7 | 31.6 | 48.7 | 284.8 | |
| 16.3 | 16.8 | 96.4 | 29.7 | 43.1 | 272.5 | |
| 17.6 | 18.2 | 97.6 | 31.6 | 40.6 | 270.0 |
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: 2026-10-01T12:00:00+00:00. Values valid: Oct 02 15:00 HKT. Retrieved: 2026-10-02T04:45:24.009324+00:00.
- Page generated from a snapshot with data state STALE_USABLE; model age 19.9 hours at generation.
- Nearest valid 0.4° model grid cell, about 22 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: COMPLETE (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.
Averaging windows used
- CO: 8h window
- NO2: 1h window
- O3: 1h, 8h window
- PM10: 24h window
- PM2.5: 24h window
- SO2: 1h, 24h window
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.
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