Air Quality in Radnor, United States

Partly Cloudy
19.9°C · 59.8% humidity
19.9°
Feels 19.9°
33
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
8 5pm
8
8
33 8pm
26
21
17 11pm
15
13
11 2am
10
—
— 5am
—
—
— 8am
—
—
— 11am
—
—
10 2pm
9
9
Station readings
10
6
5
6
CAMS model adj -17
25
25
25
25
25
25
25
25
25
25
25
25
25
25
AD 728×90

Air Quality Index Trend

35h · 1 stn

Radnor's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Radnor is 1.6× the WHO annual guideline of 5 µg/m³.

59.8%
Humidity
14.5 km/h
Wind SSW
1019.5 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
33
7.86 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Radnor?

Temperature & Precipitation

PM2.5 Trend

35h · 1 station
PM2.57.86 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (3 stations within 25 km)
7.86
Median
5.72
Average
1.36
Low
9.1
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -1.9

What is the 7-day forecast for Radnor?

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: 4.2°C

Where are air quality stations near Radnor?

35
Norristown, Pennsylvania, USA
8.5 km PM2.5: 8.4 µg/m³
19
AMS ROX Station
10.1 km PM2.5: 4.5 µg/m³
20
6906 City Ave
10.9 km PM2.5: 4.8 µg/m³
20
C077 ( 945 Manatawna Ave)
11.1 km PM2.5: 4.9 µg/m³
20
C029 (5400 Lincoln Hwy)
11.8 km PM2.5: 4.7 µg/m³
19
CAMP - OEEC Installation 9
12.0 km PM2.5: 4.5 µg/m³
19
6237 Ridge Ave
12.2 km PM2.5: 4.6 µg/m³
20
723 Wolcott Dr (2)
12.8 km PM2.5: 4.8 µg/m³
19
5029 Ridge ave
13.0 km PM2.5: 4.5 µg/m³
20
8701 Germantown Ave
13.4 km PM2.5: 4.7 µg/m³

What cities are near Radnor?

38 King of Prussia 31 Havertown 38 Norristown 23 Overbrook 28 Drexel Hill 19 Haddington 26 East Mount Airy 18 Cobbs Creek 38 Phoenixville 16 Kingsessing
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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 2026-05-29T00:10 UTC.