Air Quality in Portland, United States

Partly Cloudy
6.5°C · 60.8% humidity
6.5°
Feels 2.7°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast

Nearby Monitoring Stations

AQI Forecast
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View AQI history for Portland →

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.

60.8%
Humidity
22.8 km/h
Wind S
1029.7 hPa
Pressure
0.0
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
25
6.0 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Portland?

Temperature & Precipitation

PM2.56.0 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.0
Low

What is the 7-day forecast for Portland?

10-21
18.6° 4.1°
0.06 mm
10-22
14.5° 5.2°
2.87 mm
10-23
13.8° 6.3°
1.25 mm
10-24
12.3° 8.6°
10-25
18.5° 8.2°
23.69 mm
10-26
9.8° 3.9°
8.12 mm
10-27
9.7° 3.8°
2.31 mm
Both models agree Avg diff: 3.6°C

What cities are near Portland?

25 South Portland 27 South Portland Gardens 27 Westbrook 27 West Scarborough 29 Saco 27 Biddeford 13 Lewiston 28 Laconia 22 Amesbury 21 Newburyport
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-21T01:23 UTC.