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

Which pollutant is driving the AQI?

PM2.5▲
55
14.15 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Portland?

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
Station readings (2 stations within 25 km)
14.15
Median
13.85
Average
12.0
Low
15.7
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -6.8

What is the 7-day forecast for Portland?

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
Both models agree Avg diff: 1.3°C

Where are air quality stations near Portland?

59
Corpus Christi Huisache
13.3 km PM2.5: 15.7 µg/m³
9
Dona Park, Corpus Christi, Texas
15.7 km PM2.5: 2.2 µg/m³
14
Dona Park, Corpus Christi, Texas
15.7 km PM2.5: 3.4 µg/m³

What cities are near Portland?

57 Corpus Christi 41 Kingsville 41 Alice 27 Victoria 28 Bay City 42 Harlingen 58 Edinburg 44 San Benito 32 Seguin 43 Mercedes
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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.