What is the air quality trend in Portland?

Over the past 8 days, the CAMS atmospheric model estimates an average AQI of 27 for Portland. No ground-level monitoring stations are currently reporting for this area.

How is Portland air quality measured?

Portland currently has no nearby ground-level monitoring stations. CERNS.IO uses the CAMS (Copernicus Atmosphere Monitoring Service) atmospheric model to provide PM2.5 and AQI estimates, and the GFS (Global Forecast System) model for temperature and precipitation data.

Air Quality History for Portland, United States

Name: Portland Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Temperature, precipitation and air quality trend for Portland, United States.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

No ground-level monitoring stations are available near Portland. Showing air quality data from the CAMS atmospheric model and weather from GFS. Model data may differ from actual ground conditions.

Air Quality Index CAMS model

168pt

PM2.5 CAMS model

168pt

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Model

Date	AQI	PM2.5 avg	Temp High	Temp Low	Precip
2026-05-30	24	5.9 µg/m³	24.8°C	24.8°C	8.4 mm
2026-05-29	24	5.9 µg/m³	17.5°C	11.3°C	0.2 mm
2026-05-28	24	5.8 µg/m³	22.1°C	14.3°C	0.0 mm
2026-05-27	32	7.7 µg/m³	24.0°C	13.5°C	0.2 mm
2026-05-26	26	6.2 µg/m³	27.8°C	10.0°C	0.2 mm
2026-05-25	26	6.4 µg/m³	21.2°C	11.0°C	12.1 mm
2026-05-24	37	9.2 µg/m³	28.4°C	8.1°C	0.0 mm
2026-05-23	26	6.3 µg/m³	16.9°C	8.0°C	3.7 mm

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