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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: 601 AM CDT Wed Oct 28 2026
The area/counties/county of: Carroll, including the city of Mount Carroll.or toggle through each period.
Today... Sunny. Highs in the mid 70s. South winds 10 to 15 mph.
Tonight... Mostly clear in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Not as cool with lows in the upper 50s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50%.
Thursday... Partly sunny in the morning, then clearing. Highs around 70. West winds 5 to 10 mph, becoming north in the afternoon.
Thursday Night... Mostly clear. Much cooler with lows in the lower 40s. North winds around 5 mph.
Friday... Partly sunny in the morning, then mostly cloudy with a chance of showers in the afternoon. Highs in the lower 60s. East winds around 5 mph. Chance of rain 50%.
Friday Night... Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 40s. Chance of rain 60%.
Saturday... Mostly cloudy with a 50% chance of showers. Highs in the mid 60s.
Saturday Night... Mostly cloudy. A chance of showers after midnight. Lows in the upper 40s. Chance of rain 40%.
Sunday... Mostly cloudy with a 30% chance of showers. Highs in the upper 60s.
Sunday Night... Mostly cloudy. Lows in the lower 50s.
Monday... Mostly cloudy. A chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 40%.
Monday Night... Showers likely. Lows in the lower 50s. Highs in the mid 60s. Chance of rain 60%.
POP = Probability of Precipitation
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