Air Quality in Norristown, United States
Clear
25.9°C · 36.1% humidity
25.9°
Feels 25.9°
42
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Norristown's air quality — share it
AQI Forecast
Calibrated
37
7pm
57
37
42
10pm
41
40
39
1am
38
31
31
4am
30
37
37
7am
30
30
30
10am
30
30
30
1pm
30
30
30
4pm
30
30
Station readings
15
21
CAMS model
adj +3
34
54
34
34
34
34
34
34
27
27
27
34
34
27
27
27
27
27
27
27
27
27
27
27
Air Quality Index Trend
46h · 1 stnNorristown's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
36.1%
Humidity
24.2 km/h
Wind NW
1011.8 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
10.0 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Norristown?
Temperature & Precipitation
PM2.5 Trend
46h · 1 stationPM2.510.0 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX2.2
Moderate
What is the 7-day forecast for Norristown?
08-03
26.3° 21.3°
15.81 mm
08-04
36.4° 21.3°
08-05
33.5° 21.1°
0.13 mm
08-06
30.3° 21.6°
08-07
32.5° 20.9°
2.25 mm
08-08
36.5° 20.9°
0.5 mm
08-09
34.3° 24.9°
Both models agree
Avg diff: 2.9°C
Where are air quality stations near Norristown?
25
Norristown, Pennsylvania, USA
19
C077 ( 945 Manatawna Ave)
20
AMS ROX Station
21
8701 Germantown Ave
22
723 Wolcott Dr (2)
18
6237 Ridge Ave
19
629 E Allen Ln
20
6735 Germantown Ave
24
5029 Ridge ave
23
C029 (5400 Lincoln Hwy)
What cities are near Norristown?
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T02:07 UTC.