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City of Lanark, ILLanark, IL 7-Day Weather Forecast
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Lanark Weather Forecast
Lanark, IL Weather Forecast Date: 226 AM CDT Sun Oct 25 2026
Weather forecast for Lanark, IL
Today Hi: 75°FHi: 24°C Lo: 50°F Lo: 10°C |
Today... Mostly cloudy. Highs in the mid 70s. South winds around 5 mph. |
| Mon Hi: 69°FHi: 21°C Lo: 45°F Lo: 7°C |
Monday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 60s. East winds 5 to 10 mph. |
| Tue Hi: 71°FHi: 22°C Lo: 51°F Lo: 11°C |
Tuesday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the lower 70s. Southeast winds 5 to 10 mph. |
Wed Hi: 75°FHi: 24°C Lo: 51°F Lo: 11°C |
Wednesday... Mostly sunny. Highs in the mid 70s. |
Thu Hi: 71°FHi: 22°C Lo: 51°F Lo: 11°C |
Thursday... Partly sunny. A chance of showers in the morning. Highs in the lower 70s. Chance of rain 50%. |
| Fri Hi: 75°FHi: 24°C Lo: 55°F Lo: 13°C |
Friday... Partly sunny. Highs in the mid 70s. |
| Sat Hi: 71°FHi: 22°C |
Saturday... Mostly cloudy with a 50% chance of showers. Highs in the lower 70s. |
Lanark Radar Loop
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