Air Quality in Norristown, United States

Windy
13.3°C · 33.5% humidity
13.3°
Feels 13.3°
37
Good
Air quality is satisfactory. Enjoy outdoor activities.
47 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
34 3pm
35
36
34 6pm
33
33
33 9pm
33
33
46 12am
46
46
46 3am
46
46
46 6am
46
46
71 9am
71
71
71 12pm
71
71
Station readings
34
35
36
34
CAMS model adj -4
37
37
37
37
37
37
37
37
37
50
50
50
50
50
50
50
50
50
75
75
75
75
75
75
AD 728×90

PM2.5 Trend (24h)

26h · 1 station
33.5%
Humidity
42.7 km/h
Wind S
1034.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Norristown?

Temperature & Precipitation

PM2.58.8 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (47 stations within 25 km)
8.8
Median
8.95
Average
7.32
Low
11.16
High
PM2.5 µg/m³ · Model: 11.9 · Bias: +3.1

What is the 7-day forecast for Norristown?

04-09
13.3° 2.6°
04-10
17.9° 6.3°
04-11
21.1° 10.1°
04-12
19.8° 10.0°
04-13
22.3° 12.1°
04-14
26.7° 17.5°
04-15
24.0° 19.9°
0.31 mm
Both models agree Avg diff: 3.0°C

Where are air quality stations near Norristown?

32
Norristown, Pennsylvania, USA
2.8 km
40
AMS ROX Station
11.6 km PM2.5: 9.7 µg/m³
45
8701 Germantown Ave
12.2 km PM2.5: 10.9 µg/m³
47
723 Wolcott Dr (2)
13.1 km PM2.5: 11.2 µg/m³
40
6237 Ridge Ave
14.1 km PM2.5: 9.6 µg/m³
43
629 E Allen Ln
14.6 km PM2.5: 10.3 µg/m³
39
6735 Germantown Ave
15.1 km PM2.5: 9.4 µg/m³
36
5029 Ridge ave
16.0 km PM2.5: 8.7 µg/m³
35
C029 (5400 Lincoln Hwy)
16.5 km PM2.5: 8.4 µg/m³
37
6906 City Ave
16.7 km PM2.5: 8.8 µg/m³

What cities are near Norristown?

38 King of Prussia 36 Radnor 42 Lansdale 36 East Mount Airy 39 Phoenixville 36 Havertown 36 West Oak Lane 36 Overbrook 36 Abington 36 Logan

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T18:59 UTC.