Air Quality in Florissant, United States

Windy
25.6°C · 47.5% humidity
25.6°
Feels 25.6°
45
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
54 9pm
54
54
45 12am
48
49
51 3am
52
52
53 6am
53
33
54 9am
54
54
54 12pm
54
34
34 3pm
34
34
54 6pm
54
54
AD 728×90

Air Quality Index Trend

37h · 4 stn

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

47.5%
Humidity
56.4 km/h
Wind NE
1017.7 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
45
10.75 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Florissant?

Temperature & Precipitation

PM2.5 Trend

37h · 4 stations
PM2.510.75 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (2 stations within 25 km)
10.75
Median
11.55
Average
9.6
Low
13.5
High
PM2.5 µg/m³ · Model: 10.0 · Bias: -0.8

What is the 7-day forecast for Florissant?

08-03
30.4° 20.9°
08-04
35.9° 19.3°
08-05
36.1° 16.1°
25.81 mm
08-06
40.2° 20.5°
3.5 mm
08-07
33.4° 21.2°
08-08
37.5° 25.9°
1.44 mm
08-09
35.3° 28.0°
Both models agree Avg diff: 3.5°C

Where are air quality stations near Florissant?

23
Ladue, Missouri, USA
15.6 km PM2.5: 5.5 µg/m³
22
Forest Park, Missouri, USA
18.0 km PM2.5: 5.3 µg/m³
72
Branch Street, Missouri, USA
18.7 km PM2.5: 22.1 µg/m³
43
East St. Louis, Illinois, USA
24.2 km PM2.5: 10.3 µg/m³
35
East St. Louis, Illinois, USA
24.2 km PM2.5: 8.4 µg/m³

What cities are near Florissant?

40 Hazelwood 44 Ferguson 40 Old Jamestown 48 Spanish Lake 41 Overland 40 Maryland Heights 40 Saint Charles 41 University City 40 Clayton 41 Alton
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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 2026-08-08T05:50 UTC.