Weather in Alton, Illinois
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 08:35 PM ET · Refreshes every hour
74°F
Clear sky
Feels like 75°F
55%
Humidity
2 mph
Wind Speed
About Weather in Alton
Alton is located in Illinois (coordinates: 38.903898°N, 90.151204°W). Weather data is sourced from Open-Meteo, a free and open meteorological API using data from national weather services including NOAA.
All temperatures are displayed in Fahrenheit. Wind speed is in miles per hour.