Air Quality in Alton, United States
Windy
17.1°C · 56.7% humidity
17.1°
Feels 17.1°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
AQI Forecast
37
7pm
37
37
37
10pm
37
50
50
1am
75
50
50
4am
50
37
37
7am
37
37
37
10am
37
50
25
1pm
25
25
25
4pm
25
37
56.7%
Humidity
82.9 km/h
Wind S
1018.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
What is the weather forecast for Alton?
Temperature & Precipitation
PM2.55.9 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
What is the 7-day forecast for Alton?
04-09
20.1° 8.1°
04-10
21.7° 11.0°
04-11
15.8° 13.4°
15.81 mm
04-12
24.7° 15.5°
0.5 mm
04-13
26.9° 17.8°
0.31 mm
04-14
25.2° 20.4°
1.13 mm
04-15
16.2° 7.3°
2.5 mm
Both models agree
Avg diff: 5.6°C
Where are air quality stations near Alton?
What cities are near Alton?
Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T22:20 UTC.