Air Quality in St. Charles, United States
Cloudy
10.6°C · 78.0% humidity
10.6°
Feels 10.6°
17
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
AQI Forecast
24
12am
24
24
17
3am
19
20
21
6am
22
23
23
9am
23
24
24
12pm
24
24
24
3pm
24
24
24
6pm
24
25
27
9pm
34
34
Air Quality Index Trend
46h · 6 stnSt. Charles's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
78.0%
Humidity
36.8 km/h
Wind NW
1012.4 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.1 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for St. Charles?
Temperature & Precipitation
PM2.5 Trend
46h · 6 stationsPM2.54.1 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
4.1
Median
4.1
Average
4.1
Low
4.1
High
PM2.5 µg/m³ · Model: 6.15 · Bias: +2.0
What is the 7-day forecast for St. Charles?
06-09
30.8° 10.6°
0.56 mm
06-10
21.8° 19.8°
20.06 mm
06-11
24.5° 14.7°
0.88 mm
06-12
28.7° 20.0°
5.56 mm
06-13
27.5° 22.2°
4.94 mm
06-14
30.7° 14.6°
06-15
32.3° 23.5°
0.06 mm
Both models agree
Avg diff: 5.9°C
Where are air quality stations near St. Charles?
17
Naperville, Illinois, USA
42
Naperville, Illinois, USA
10
Naperville, Illinois, USA
13
Naperville, Illinois, USA
What cities are near St. Charles?
Get AQI alerts for St. Charles
Notify me when air quality reaches:
Free · No account · Unsubscribe any time
Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T08:04 UTC.