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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: 536 PM CDT Sat Sep 05 2026
Weather forecast for Lanark, IL
Tonight Lo: 61°F Lo: 16°C |
Tonight... Partly cloudy. Cooler with lows in the lower 60s. Northeast winds 5 to 10 mph. |
Sun Hi: 81°FHi: 27°C Lo: 59°F Lo: 15°C |
Sunday... Mostly sunny. Humid with highs in the lower 80s. East winds around 5 mph. |
| Labor Day Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Labor Day... Mostly sunny. Highs in the lower 80s. Southeast winds 5 to 10 mph. |
| Tue Hi: 89°FHi: 32°C Lo: 70°F Lo: 21°C |
Tuesday... Mostly sunny. Highs in the upper 80s. |
Wed Hi: 89°FHi: 32°C Lo: 60°F Lo: 16°C |
Wednesday... Partly sunny. Highs in the upper 80s. |
Thu Hi: 80°FHi: 27°C Lo: 59°F Lo: 15°C |
Thursday... Partly cloudy. Lows around 60. Highs around 80. |
| Fri Hi: 81°FHi: 27°C Lo: 60°F Lo: 16°C |
Friday... Partly cloudy. Highs in the lower 80s. Lows around 60. |
| Sat Hi: 81°FHi: 27°C Lo: 60°F Lo: 16°C |
Saturday... Partly cloudy. Highs in the lower 80s. Lows around 60. |
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