Air Quality in Gresham, United States

Clear
21.1°C · 43.3% humidity
21.1°
Feels 21.1°
54
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
4 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
54 2pm
55
53
54 5pm
49
45
43 8pm
41
39
45 11pm
45
44
44 2am
44
43
43 5am
63
63
63 8am
63
63
63 11am
63
43
Station readings
54
55
53
40
CAMS model adj +9
54
34
27
27
27
27
27
27
27
34
34
34
34
34
34
34
54
54
54
54
54
54
54
34
AD 728×90

Air Quality Index Trend

44h · 3 stn

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

43.3%
Humidity
21.4 km/h
Wind NW
1016.7 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
54
13.46 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Gresham?

Temperature & Precipitation

PM2.5 Trend

44h · 3 stations
PM2.513.46 µg/m³ ✓ WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX17.4
Extreme
AD 300×250
Station readings (4 stations within 25 km)
13.46
Median
13.39
Average
13.1
Low
13.7
High
PM2.5 µg/m³ · Model: 8.2 · Bias: -5.3

What is the 7-day forecast for Gresham?

08-03
36.1° 11.6°
08-04
29.5° 14.6°
08-05
34.7° 14.1°
08-06
28.0° 16.2°
08-07
32.8° 14.0°
08-08
29.0° 10.7°
08-09
29.3° 10.5°
Both models agree Avg diff: 4.3°C

Where are air quality stations near Gresham?

51
Gresham Centennial High School
4.1 km PM2.5: 12.1 µg/m³
48
Portland McDaniel High School
12.5 km PM2.5: 11.5 µg/m³
63
Portland Cully Helensview, Oregon, USA
13.3 km PM2.5: 17.8 µg/m³
45
Portland Cully Helensview, Oregon, USA
13.3 km PM2.5: 10.8 µg/m³
54
Portland, Oregon, USA
13.4 km PM2.5: 13.5 µg/m³
156
Portland Postal Bldg., Oregon, USA
13.6 km PM2.5: 65.2 µg/m³
34
Portland Lane Middle School
13.6 km PM2.5: 8.1 µg/m³
37
Vancouver-Blairmont Dr
14.4 km PM2.5: 8.8 µg/m³
48
Portland Benson High School
17.4 km PM2.5: 11.4 µg/m³
34
Portland Lincoln High School
20.1 km PM2.5: 8.1 µg/m³

What cities are near Gresham?

54 Troutdale 54 Happy Valley 54 Camas 54 Lents 54 Washougal 54 Milwaukie 54 Oak Grove 26 West Linn 54 Lake Oswego 26 Oregon City
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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 2026-08-08T00:54 UTC.