Air Quality in Portland, United States

Windy
27.3°C · 81.7% humidity
27.3°
Feels 33.0°
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
3 stations

Nearby Monitoring Stations

AQI Forecast
34 8pm
34
34
53 11pm
48
44
41 2am
39
38
37 5am
36
35
28 8am
28
27
27 11am
27
27
27 2pm
27
27
27 5pm
27
25
AD 728×90

Air Quality Index Trend

47h · 1 stn

Portland's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

81.7%
Humidity
65.5 km/h
Wind SSE
1012.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
53
13.11 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

47h · 1 station
PM2.513.11 µg/m³ ✓ WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
13.11
Median
12.87
Average
11.8
Low
15.0
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -5.8
06-09
31.8° 24.6°
0.06 mm
06-10
31.9° 26.9°
0.13 mm
06-11
30.9° 25.9°
06-12
31.7° 26.7°
0.31 mm
06-13
31.5° 26.5°
0.06 mm
06-14
31.4° 24.7°
0.06 mm
06-15
33.0° 26.7°
0.19 mm
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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 2026-06-09T04:46 UTC.