Air Quality in Norristown, United States
Drizzle
23.2°C · 94.8% humidity
23.2°
Feels 23.2°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Norristown's air quality — share it
AQI Forecast
Calibrated
8
2pm
8
8
25
5pm
20
17
16
8pm
14
11
10
11pm
10
9
9
2am
9
8
8
5am
8
8
8
8am
8
8
7
11am
7
7
Station readings
7
CAMS model
adj -17
25
25
25
25
25
25
27
27
25
25
25
25
25
25
25
25
25
25
25
25
25
24
24
24
Air Quality Index Trend
38h · 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.
94.8%
Humidity
61.8 km/h
Wind NNW
1013.4 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.0 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Norristown?
Temperature & Precipitation
PM2.5 Trend
38h · 1 stationPM2.56.0 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX4.4
Moderate
What is the 7-day forecast for Norristown?
05-29
20.2° 11.3°
0.06 mm
05-30
23.2° 10.2°
15.38 mm
05-31
28.8° 9.7°
06-01
28.0° 13.8°
06-02
21.9° 12.3°
06-03
25.5° 18.2°
3.69 mm
06-04
22.9° 19.9°
Both models agree
Avg diff: 4.7°C
Where are air quality stations near Norristown?
31
Norristown, Pennsylvania, USA
20
C077 ( 945 Manatawna Ave)
20
AMS ROX Station
25
8701 Germantown Ave
20
723 Wolcott Dr (2)
20
6237 Ridge Ave
21
629 E Allen Ln
21
6735 Germantown Ave
20
5029 Ridge ave
20
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 2026-05-29T21:09 UTC.