Air Quality in St. Charles, United States

Windy
25.3°C · 41.8% humidity
25.3°
Feels 25.3°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast
54 5pm
54
54
36 8pm
41
45
47 11pm
49
51
52 2am
52
53
53 5am
53
54
24 8am
24
25
25 11am
25
24
24 2pm
24
24
AD 728×90

Air Quality Index Trend

45h · 89 stn

St. 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.

41.8%
Humidity
44.2 km/h
Wind N
1018.3 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
36
8.6 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for St. Charles?

Temperature & Precipitation

PM2.5 Trend

45h · 89 stations
PM2.58.6 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (1 station within 25 km)
8.6
Median
8.6
Average
8.6
Low
8.6
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +4.9

What is the 7-day forecast for St. Charles?

08-03
25.3° 17.6°
5.5 mm
08-04
31.6° 14.4°
08-05
29.5° 13.7°
4.0 mm
08-06
32.7° 21.3°
0.44 mm
08-07
28.7° 16.4°
0.06 mm
08-08
31.3° 16.3°
7.19 mm
08-09
31.5° 23.1°
Both models agree Avg diff: 3.3°C

Where are air quality stations near St. Charles?

35
Naperville, Illinois, USA
20.5 km PM2.5: 8.4 µg/m³
33
Naperville, Illinois, USA
20.5 km PM2.5: 7.9 µg/m³
36
Naperville, Illinois, USA
20.5 km PM2.5: 8.6 µg/m³

What cities are near St. Charles?

36 Geneva 36 Batavia 34 Wasco 35 South Elgin 36 West Chicago 36 North Aurora 36 Bartlett 41 Elgin 36 Carol Stream 41 Streamwood
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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 2026-08-08T01:01 UTC.