Air Quality in Maryland Heights, United States

Windy
25.9°C · 44.9% humidity
25.9°
Feels 25.9°
40
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
25 7pm
25
25
40 10pm
36
33
31 1am
29
28
27 4am
26
26
26 7am
6
25
25 10am
25
25
25 1pm
5
5
5 4pm
5
25
Station readings 49h ago
AQI 25
PM2.5 6.0 µg/m³ · 49h ago
AD 728×90

Air Quality Index Trend

36h · 4 stn

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

44.9%
Humidity
58.4 km/h
Wind NE
1017.8 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
40
9.6 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Maryland Heights?

Temperature & Precipitation

PM2.5 Trend

36h · 4 stations
PM2.59.6 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (1 station within 25 km)
9.6
Median
9.6
Average
9.6
Low
9.6
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +0.4

What is the 7-day forecast for Maryland Heights?

08-03
30.6° 20.4°
08-04
35.6° 19.3°
08-05
36.9° 16.4°
11.56 mm
08-06
40.3° 20.6°
2.38 mm
08-07
33.7° 22.2°
08-08
37.4° 24.3°
1.44 mm
08-09
39.7° 25.3°
0.31 mm
Both models agree Avg diff: 3.7°C

Where are air quality stations near Maryland Heights?

55
Ladue, Missouri, USA
9.8 km PM2.5: 14.0 µg/m³
23
Ladue, Missouri, USA
9.8 km PM2.5: 5.5 µg/m³
36
Forest Park, Missouri, USA
15.8 km PM2.5: 8.6 µg/m³
41
Blair Street, Missouri, USA
21.0 km PM2.5: 9.8 µg/m³
36
East St. Louis, Illinois, USA
25.9 km PM2.5: 8.6 µg/m³

What cities are near Maryland Heights?

42 Creve Coeur 41 Overland 40 Hazelwood 40 Saint Charles 44 Ferguson 40 Clayton 41 University City 45 Florissant 40 Chesterfield 44 Kirkwood
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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 2026-08-08T03:08 UTC.