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Mercer County, IL Weather Forecast
Mercer County, IL Weather Forecast Date: 852 PM CST Mon Mar 02 2026
The area/counties/county of: Mercer, including the city of Aledo.or toggle through each period.
Tonight... Cloudy. A chance of rain after midnight. Lows in the mid 30s. Southeast winds around 5 mph. Chance of rain 40%.
Tuesday... Cloudy. Rain likely, mainly in the morning. Highs in the upper 40s. East winds around 5 mph. Chance of rain 70%.
Tuesday Night... Mostly cloudy with a chance of rain. Lows in the mid 30s. Northeast winds 5 to 10 mph. Chance of rain 50%.
Wednesday... Mostly cloudy with a chance of rain. Highs in the lower 50s. East winds 5 to 10 mph. Chance of rain 50%.
Wednesday Night... Rain likely. Lows in the mid 40s. East winds around 5 mph. Chance of rain 70%.
Thursday... Cloudy. Rain likely, mainly in the morning. Highs in the upper 50s. Chance of rain 70%.
Thursday Night... Mostly cloudy. A chance of rain after midnight. Lows in the mid 40s. Chance of rain 40%.
Friday... Rain, warmer with highs in the lower 70s. Chance of rain 90%.
Friday Night... A chance of thunderstorms in the evening. Rain. Lows in the lower 50s. Chance of rain 90%.
Saturday... Mostly cloudy. A chance of rain in the morning. Highs in the lower 60s. Chance of rain 40%.
Saturday Night... Partly cloudy. Lows in the upper 30s. Highs in the lower 60s.
Sunday... Partly cloudy. Lows in the upper 30s. Highs in the lower 60s.
Sunday Night... Mostly clear. Lows in the lower 40s. Highs in the upper 60s.
POP = Probability of Precipitation
Mercer County Radar Loop
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