What is the air quality in Florissant today?

The current Air Quality Index (AQI) in Florissant is 40 (Good). PM2.5 concentration is 9.63 µg/m³.

What is the temperature in Florissant right now?

The current temperature in Florissant is 29.8°C (feels like 32.7°C). Humidity is 50.0% and wind speed is 44.7 km/h.

Is it safe to go outside in Florissant?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 9.4 (Very High).

Air Quality in Florissant, United States

Windy

29.8°C · 50.0% humidity

29.8°

Feels 32.7°

Good

Air quality is satisfactory. Enjoy outdoor activities.

5 stations

Nearby Monitoring Stations

AQI Forecast

54 12pm

40 3pm

36 6pm

28 9pm

27 12am

24 3am

24 6am

25 9am

Air Quality Index Trend

42h · 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.

50.0%

Humidity

44.7 km/h

Wind NE

1012.7 hPa

Pressure

9.4

UV Very High

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

9.63 µg/m³

PM10

20.55 µg/m³

050100150200300500

What is the weather forecast for Florissant?

Temperature & Precipitation

PM2.5 Trend

42h · 6 stations

PM2.59.63 µg/m³ ✓ WHO

Good

PM1020.55 µg/m³

Good

UV INDEX9.4

Very High

Station readings (5 stations within 25 km)

9.63

Median

10.16

Average

6.7

Low

14.5

High

PM2.5 µg/m³ · Model: 7.35 · Bias: -2.3

What is the 7-day forecast for Florissant?

07-21

32.6° 24.2°

07-22

28.6° 22.4°

07-23

21.4° 20.4°

0.31 mm

07-24

30.3° 19.8°

0.56 mm

07-25

27.0° 20.3°

2.81 mm

07-26

33.3° 24.1°

1.25 mm

07-27

31.2° 22.7°

Both models agree Avg diff: 3.5°C

Where are air quality stations near Florissant?

Forest Park, Missouri, USA

18.0 km PM2.5: 10.1 µg/m³

East St. Louis, Illinois, USA

24.2 km PM2.5: 10.1 µg/m³

What cities are near Florissant?

36 Hazelwood 39 Ferguson 40 Old Jamestown 44 Spanish Lake 33 Overland 33 Maryland Heights 29 Saint Charles 32 University City 30 Clayton 45 Alton

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ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

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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 2026-07-21T20:55 UTC.