Weather in Lanark, Illinois
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 04:56 PM ET · Refreshes every hour
80°F
Clear sky
Feels like 77°F
29%
Humidity
10 mph
Wind Speed
About Weather in Lanark
Lanark is located in Illinois (coordinates: 42.101885°N, 89.833399°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.