Weather in Union, Illinois
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 04:57 PM ET · Refreshes every hour
74°F
Clear sky
Feels like 73°F
39%
Humidity
5 mph
Wind Speed
About Weather in Union
Union is located in Illinois (coordinates: 42.231567°N, 88.54478°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.