Air Quality in Portland, United States

Windy
6.6°C · 47.0% humidity
6.6°
Feels 0.1°
7
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast Calibrated
27 7pm
25
15
3 10pm
3
3
3 1am
15
15
15 4am
15
15
15 7am
15
15
28 10am
28
28
28 1pm
28
28
53 4pm
28
28
Station readings
27
25
CAMS model adj -22
37
37
37
25
25
25
25
37
37
37
37
37
37
37
37
50
50
50
50
50
50
75
50
50
AD 728×90

PM2.5 Trend (24h)

22h · 1 station
47.0%
Humidity
65.1 km/h
Wind SSW
1030.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Portland?

Temperature & Precipitation

PM2.51.74 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250

What is the 7-day forecast for Portland?

04-09
10.0° -0.0°
04-10
17.7° 3.9°
04-11
21.2° 7.7°
04-12
13.4° 5.5°
04-13
11.8° 6.8°
6.5 mm
04-14
26.7° 14.9°
04-15
22.2° 18.4°
3.19 mm
Both models agree Avg diff: 4.5°C

What cities are near Portland?

7 South Portland 7 South Portland Gardens 7 Westbrook 6 West Scarborough 6 Saco 6 Biddeford 26 Lewiston Laconia 20 Amesbury 10 Newburyport

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T22:25 UTC.