Air Quality in Portland, United States

Windy
27.3°C · 81.7% humidity
27.3°
Feels 33.0°
55
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations

Nearby Monitoring Stations

AQI Forecast
34 9pm
34
34
55 12am
49
45
42 3am
40
38
37 6am
36
28
28 9am
28
28
27 12pm
27
27
27 3pm
27
27
27 6pm
25
25
AD 728×90

Air Quality Index Trend

45h · 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
55
14.15 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

45h · 1 station
PM2.514.15 µg/m³ ✓ WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
14.15
Median
13.85
Average
12.0
Low
15.7
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -6.8
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 2026-06-09T05:36 UTC.