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City of Lanark, ILLanark, IL 7-Day Night Weather Forecast
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Lanark, IL Weather Forecast
Lanark, IL Weather Forecast Date: 446 PM CDT Sat Sep 05 2026
The area/counties/county of: Carroll, including the city of Mount Carroll.or toggle through each period.
Tonight... Partly cloudy. Cooler with lows in the lower 60s. Northeast winds 5 to 10 mph.
Sunday... Mostly sunny. Humid with highs in the lower 80s. East winds around 5 mph.
Sunday Night... Partly cloudy in the evening, then clearing. Lows in the upper 50s. East winds 5 to 10 mph.
Labor Day... Mostly sunny. Highs in the lower 80s. Southeast winds 5 to 10 mph.
Monday Night... Partly cloudy. Lows in the lower 60s. Southeast winds 5 to 10 mph.
Tuesday... Mostly sunny. Highs in the upper 80s.
Tuesday Night... Partly cloudy. A chance of showers after midnight. Lows around 70. Chance of rain 40%.
Wednesday... Partly sunny. Highs in the upper 80s.
Wednesday Night... Partly cloudy. Lows around 60. Highs around 80.
Thursday... Partly cloudy. Lows around 60. Highs around 80.
Thursday Night... Partly cloudy in the evening, then clearing. Lows in the upper 50s.
Friday... Partly cloudy. Highs in the lower 80s. Lows around 60.
POP = Probability of Precipitation
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