Air Quality in Norristown, United States

Windy
12.1°C · 69.0% humidity
12.1°
Feels 12.1°
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
48 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
31 11pm
31
31
19 2am
22
25
27 5am
28
29
29 8am
37
37
37 11am
38
58
58 2pm
38
38
38 5pm
38
31
31 8pm
38
38
Station readings
9
6
CAMS model adj +4
27
27
27
27
27
27
27
27
27
27
34
34
34
34
54
54
34
34
34
34
27
27
34
34
AD 728×90

Air Quality Index Trend

35h · 1 stn

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

69.0%
Humidity
49.2 km/h
Wind W
1002.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
19
4.63 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Norristown?

Temperature & Precipitation

PM2.5 Trend

35h · 1 station
PM2.54.63 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (48 stations within 25 km)
4.63
Median
4.49
Average
4.05
Low
6.06
High
PM2.5 µg/m³ · Model: 6.25 · Bias: +1.6

What is the 7-day forecast for Norristown?

06-09
32.2° 12.1°
0.19 mm
06-10
28.8° 20.0°
14.25 mm
06-11
24.2° 11.5°
06-12
22.9° 17.4°
10.56 mm
06-13
30.8° 19.3°
06-14
26.9° 17.6°
4.44 mm
06-15
24.3° 15.9°
Both models agree Avg diff: 6.1°C

Where are air quality stations near Norristown?

14
Norristown, Pennsylvania, USA
2.8 km PM2.5: 3.4 µg/m³
19
C077 ( 945 Manatawna Ave)
10.4 km PM2.5: 4.6 µg/m³
18
AMS ROX Station
11.6 km PM2.5: 4.2 µg/m³
18
8701 Germantown Ave
12.2 km PM2.5: 4.4 µg/m³
19
723 Wolcott Dr (2)
13.1 km PM2.5: 4.5 µg/m³
18
6237 Ridge Ave
14.1 km PM2.5: 4.2 µg/m³
18
629 E Allen Ln
14.6 km PM2.5: 4.4 µg/m³
19
6735 Germantown Ave
15.1 km PM2.5: 4.5 µg/m³
18
5029 Ridge ave
16.0 km PM2.5: 4.3 µg/m³
18
C029 (5400 Lincoln Hwy)
16.5 km PM2.5: 4.2 µg/m³

What cities are near Norristown?

19 King of Prussia 19 Radnor 19 Lansdale 19 East Mount Airy 19 Phoenixville 18 Havertown 19 West Oak Lane 18 Overbrook 20 Abington 19 Logan
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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 2026-06-09T06:50 UTC.