Finland · Europe/Helsinki
Helsinki air quality
53
Moderate
CAMS model-based US AQI estimate
Highest pollutant sub-index: PM2.5
Model values for Oct 02 10:00 EEST · 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 particles8.9 µg/m³
- PM10Coarse particles9.5 µg/m³
- O3Ozone50.9 µg/m³
- NO2Nitrogen dioxide8.4 µg/m³
- SO2Sulphur dioxide0.7 µg/m³
- COCarbon monoxide188.2 µg/m³
Weather in Helsinki
See the temperature, rain and wind forecast for Helsinki.
Helsinki 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 |
|---|---|---|---|---|---|---|
| 8.9 | 9.7 | 54.1 | 6.9 | 0.6 | 181.9 | |
| 9.2 | 10.1 | 56.9 | 6.0 | 0.6 | 179.1 | |
| 9.8 | 10.9 | 60.0 | 5.5 | 0.6 | 176.8 | |
| 10.4 | 11.6 | 62.2 | 5.4 | 0.6 | 175.7 | |
| 10.9 | 12.1 | 63.1 | 5.8 | 0.6 | 175.9 | |
| 11.4 | 12.6 | 62.9 | 6.6 | 0.7 | 176.9 | |
| 11.8 | 13.0 | 61.3 | 7.8 | 0.7 | 178.4 | |
| 12.1 | 13.2 | 56.4 | 10.4 | 0.7 | 182.4 | |
| 13.2 | 14.3 | 50.9 | 13.9 | 0.8 | 190.1 | |
| 13.5 | 14.7 | 50.8 | 14.2 | 0.9 | 192.1 | |
| 13.3 | 14.5 | 51.8 | 13.8 | 0.9 | 193.3 | |
| 12.6 | 13.8 | 53.5 | 13.0 | 1.0 | 192.8 | |
| 11.6 | 12.6 | 55.1 | 12.0 | 0.9 | 192.1 | |
| 10.3 | 11.1 | 56.9 | 11.3 | 0.9 | 190.5 | |
| 8.7 | 9.3 | 59.3 | 10.3 | 0.8 | 187.5 | |
| 7.3 | 7.7 | 61.9 | 9.2 | 0.8 | 184.6 | |
| 6.4 | 6.6 | 62.3 | 8.7 | 0.7 | 182.8 | |
| 6.0 | 6.2 | 62.5 | 8.1 | 0.7 | 180.1 | |
| 5.5 | 5.8 | 61.9 | 7.6 | 0.7 | 177.5 | |
| 5.4 | 5.9 | 60.4 | 7.4 | 0.6 | 175.6 | |
| 5.0 | 5.6 | 58.5 | 7.4 | 0.6 | 174.1 | |
| 4.8 | 5.5 | 56.8 | 7.7 | 0.7 | 173.9 | |
| 4.8 | 5.5 | 55.3 | 7.3 | 0.7 | 173.9 | |
| 4.7 | 5.2 | 53.8 | 6.8 | 0.8 | 175.8 |
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: 2026-10-01T12:00:00+00:00. Values valid: Oct 02 10:00 EEST. Retrieved: 2026-10-02T05:06:22.243588+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 20 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
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