Air Quality in Norristown, United States

Clear
10.4°C · 43.7% humidity
10.4°
Feels 10.4°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
47 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
37 8pm
36
35
27 11pm
48
48
48 2am
48
48
48 5am
48
48
48 8am
73
73
73 11am
73
73
73 2pm
73
73
48 5pm
48
48
Station readings
37
36
35
27
CAMS model adj -2
37
37
37
37
50
50
50
50
50
50
50
50
50
75
75
75
75
75
75
75
75
50
50
50
AD 728×90

PM2.5 Trend (24h)

26h · 1 station
43.7%
Humidity
33.8 km/h
Wind SSW
1031.9 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Norristown?

Temperature & Precipitation

PM2.58.72 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (47 stations within 25 km)
8.72
Median
8.92
Average
7.69
Low
11.55
High
PM2.5 µg/m³ · Model: 11.9 · Bias: +3.2

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: 2.9°C

Where are air quality stations near Norristown?

34
Norristown, Pennsylvania, USA
2.8 km
34
Norristown, Pennsylvania, USA
2.8 km
35
AMS ROX Station
11.6 km PM2.5: 8.3 µg/m³
36
8701 Germantown Ave
12.2 km PM2.5: 8.6 µg/m³
39
723 Wolcott Dr (2)
13.1 km PM2.5: 9.4 µg/m³
34
6237 Ridge Ave
14.1 km PM2.5: 8.1 µg/m³
37
629 E Allen Ln
14.6 km PM2.5: 8.8 µg/m³
37
6735 Germantown Ave
15.1 km PM2.5: 8.8 µg/m³
33
5029 Ridge ave
16.0 km PM2.5: 8.0 µg/m³
31
C029 (5400 Lincoln Hwy)
16.5 km PM2.5: 7.4 µg/m³

What cities are near Norristown?

36 King of Prussia 36 Radnor 38 Lansdale 36 East Mount Airy 36 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 2026-04-09T23:59 UTC.