Air Quality in Portland, United States
Windy
34.0°C · 51.6% humidity
34.0°
Feels 39.1°
33
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Portland's air quality — share it
AQI Forecast
Calibrated
35
6pm
35
35
33
9pm
35
35
35
12am
35
35
35
3am
35
35
35
6am
35
35
35
9am
37
37
37
12pm
37
37
37
3pm
37
37
Station readings
7h ago
AQI 24
PM2.5 5.8 µg/m³ · 7h ago
CAMS model
adj +10
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
27
27
27
27
27
27
27
27
Air Quality Index Trend
38h · 2 stnPortland's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
51.6%
Humidity
75.1 km/h
Wind SSE
1012.7 hPa
Pressure
9.4
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
8.0 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Portland?
Temperature & Precipitation
PM2.5 Trend
38h · 2 stationsPM2.58.0 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX9.4
Very High
Station readings (1 station within 25 km)
8.0
Median
8.0
Average
8.0
Low
8.0
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -2.0
What is the 7-day forecast for Portland?
08-03
34.0° 27.6°
0.13 mm
08-04
32.8° 26.3°
0.31 mm
08-05
33.1° 27.4°
08-06
32.6° 27.7°
2.25 mm
08-07
33.8° 28.0°
08-08
33.0° 27.9°
0.13 mm
08-09
33.2° 27.6°
0.62 mm
Both models agree
Avg diff: 1.4°C
Where are air quality stations near Portland?
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T02:08 UTC.