Air Quality in Alton, United States

Windy
24.5°C · 55.9% humidity
24.5°
Feels 24.5°
41
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast
54 5pm
54
54
41 8pm
45
47
29 11pm
31
32
32 2am
33
33
33 5am
34
34
34 8am
54
54
54 11am
54
54
34 2pm
34
34
AD 728×90

Air Quality Index Trend

35h · 5 stn

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

55.9%
Humidity
62.3 km/h
Wind NE
1018.0 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
41
9.94 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Alton?

Temperature & Precipitation

PM2.5 Trend

35h · 5 stations
PM2.59.94 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
AD 300×250

What is the 7-day forecast for Alton?

08-03
27.5° 18.5°
08-04
33.0° 17.5°
08-05
34.5° 14.2°
22.19 mm
08-06
37.0° 22.0°
2.31 mm
08-07
28.9° 20.0°
08-08
36.7° 23.1°
0.44 mm
08-09
32.8° 25.5°
Both models agree Avg diff: 3.7°C

Where are air quality stations near Alton?

33
Jerseyvl, Illinois, USA
27.2 km PM2.5: 7.9 µg/m³

What cities are near Alton?

42 Upper Alton 35 Godfrey 40 Old Jamestown 48 Spanish Lake 45 Florissant 44 Ferguson 40 Hazelwood 52 Granite City 33 Edwardsville 41 Overland
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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 2026-08-08T01:59 UTC.