Weather in Williamson, Illinois
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 05:02 PM ET · Refreshes every hour
79°F
Clear sky
Feels like 80°F
43%
Humidity
8 mph
Wind Speed
About Weather in Williamson
Williamson is located in Illinois (coordinates: 38.98453°N, 89.762536°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.