What is the air quality in Florissant today?

The current Air Quality Index (AQI) in Florissant is 34 (Good). PM2.5 concentration is 8.08 µg/m³.

What is the temperature in Florissant right now?

The current temperature in Florissant is 19.8°C (feels like 19.8°C). Humidity is 96.3% and wind speed is 44.1 km/h.

Is it safe to go outside in Florissant?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 19.9 (Extreme).

Air Quality in Florissant, United States

Drizzle

19.8°C · 96.3% humidity

19.8°

Feels 19.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

5 stations

Nearby Monitoring Stations

AQI Forecast

54 9am

34 12pm

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Air Quality Index Trend

45h · 6 stn

View full history →

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.

96.3%

Humidity

44.1 km/h

Wind NE

1018.9 hPa

Pressure

19.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

8.08 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Florissant?

Temperature & Precipitation

PM2.5 Trend

45h · 6 stations

PM2.58.08 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX19.9

Extreme

Station readings (5 stations within 25 km)

8.08

Median

8.94

Average

5.0

Low

12.6

High

PM2.5 µg/m³ · Model: 8.2 · Bias: +0.1

What is the 7-day forecast for Florissant?

09-05

26.6° 19.8°

3.37 mm

09-06

38.4° 18.6°

3.06 mm

09-07

29.2° 22.6°

09-08

25.2° 21.0°

9.88 mm

09-09

24.4° 16.2°

8.12 mm

09-10

32.1° 19.3°

0.38 mm

09-11

38.3° 20.3°

0.06 mm

Both models agree Avg diff: 6.3°C

Where are air quality stations near Florissant?

Ladue, Missouri, USA

15.6 km PM2.5: 9.4 µg/m³

Forest Park, Missouri, USA

18.0 km PM2.5: 6.5 µg/m³

Blair Street, Missouri, USA

18.3 km PM2.5: 8.4 µg/m³

East St. Louis, Illinois, USA

24.2 km PM2.5: 12.6 µg/m³

What cities are near Florissant?

27 Hazelwood 32 Ferguson 30 Old Jamestown 37 Spanish Lake 27 Overland 25 Maryland Heights 23 Saint Charles 27 University City 25 Clayton 38 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 2026-09-05T17:05 UTC.