Cambodia · Asia/Phnom_Penh
Phnom Penh air quality
72
Moderate
CAMS model-based US AQI estimate
Highest pollutant sub-index: PM2.5
Model values for Oct 02 14:00 +07 · 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 particles18.2 µg/m³
- PM10Coarse particles18.3 µg/m³
- O3Ozone139.5 µg/m³
- NO2Nitrogen dioxide2.1 µg/m³
- SO2Sulphur dioxide8.5 µg/m³
- COCarbon monoxide410.2 µg/m³
Weather in Phnom Penh
See the temperature, rain and wind forecast for Phnom Penh.
Phnom Penh 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 |
|---|---|---|---|---|---|---|
| 17.0 | 17.1 | 128.7 | 2.7 | 7.3 | 405.1 | |
| 16.2 | 16.3 | 111.1 | 4.4 | 5.9 | 415.5 | |
| 15.9 | 16.0 | 103.1 | 5.5 | 5.7 | 427.6 | |
| 17.8 | 17.9 | 85.8 | 10.0 | 5.5 | 506.6 | |
| 18.3 | 18.3 | 88.4 | 9.3 | 5.7 | 510.5 | |
| 20.5 | 20.5 | 81.7 | 10.6 | 6.1 | 549.6 | |
| 22.2 | 22.2 | 76.7 | 11.1 | 6.0 | 571.4 | |
| 22.7 | 22.7 | 76.8 | 10.7 | 6.2 | 569.9 | |
| 22.8 | 22.9 | 76.3 | 10.8 | 6.4 | 569.3 | |
| 22.6 | 22.6 | 78.3 | 10.1 | 6.7 | 553.8 | |
| 25.3 | 25.4 | 70.8 | 11.4 | 6.6 | 565.3 | |
| 28.2 | 28.3 | 66.0 | 12.2 | 6.7 | 574.4 | |
| 31.3 | 31.3 | 57.3 | 12.6 | 6.2 | 586.6 | |
| 32.2 | 32.2 | 57.9 | 11.2 | 6.4 | 577.9 | |
| 34.4 | 34.5 | 58.2 | 11.8 | 6.9 | 588.6 | |
| 36.8 | 36.9 | 60.0 | 12.5 | 7.7 | 610.4 | |
| 33.8 | 33.8 | 70.7 | 9.7 | 9.0 | 582.8 | |
| 22.1 | 22.1 | 86.9 | 6.2 | 10.5 | 516.1 | |
| 18.3 | 18.3 | 94.0 | 4.2 | 9.3 | 482.7 | |
| 15.8 | 15.9 | 100.8 | 2.8 | 7.6 | 456.3 | |
| 14.4 | 14.4 | 107.0 | 2.2 | 7.0 | 435.7 | |
| 13.2 | 13.2 | 106.2 | 2.1 | 5.8 | 416.2 | |
| 12.4 | 12.4 | 106.0 | 1.9 | 5.0 | 402.9 | |
| 11.6 | 11.6 | 105.7 | 2.0 | 4.6 | 394.7 |
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 14:00 +07. Retrieved: 2026-10-02T04:36:08.523359+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 13 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.
Provider times stay separate from page generation: collecting data or regenerating this page never resets the source time. Data sources and methodology
Static snapshot is available without JavaScript.