Weather WorldBarrett Lake, MO 7-Day Night Weather Forecast
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Barrett Lake, MO Weather Forecast
Barrett Lake, MO Weather Forecast Date: 603 PM CDT Mon Sep 28 2026
The area/counties/county of: Madison County Il, including the cities of: Alton, Edwardsville, Belleville, Cahokia, Saint Charles, and Saint Louis.or toggle through each period.
Tonight... Clear. Lows in the lower 50s. Northeast winds around 5 mph this evening, becoming light and variable.
Tuesday... Sunny. Highs in the lower 80s. Southeast winds around 5 mph.
Tuesday Night... Partly cloudy. Not as cool with lows in the mid 60s. Southeast winds around 5 mph.
Wednesday... Mostly sunny. Highs in the upper 80s. South winds 5 to 10 mph.
Wednesday Night... Mostly cloudy. Lows in the lower 70s. South winds 5 to 10 mph.
Thursday... Mostly cloudy. A chance of showers in the morning, then showers likely with a slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 70%.
Thursday Night... Showers likely. A chance of thunderstorms, mainly in the evening. Lows in the mid 60s. Chance of rain 70%.
Friday... A slight chance of thunderstorms. Showers likely, mainly in the morning. Cooler with highs in the lower 70s. Chance of rain 70%.
Friday Night... Mostly cloudy with a 50% chance of showers. Lows in the upper 50s. Highs in the lower 70s.
Saturday... Mostly cloudy with a 50% chance of showers. Lows in the upper 50s. Highs in the lower 70s.
Sunday... Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 20%.
Sunday Night... Partly cloudy. A slight chance of showers in the evening. Lows in the lower 50s. Chance of rain 20%.
POP = Probability of Precipitation
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