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Graus Lake, MO Weather Forecast
Graus Lake, MO Weather Forecast Date: 223 PM CDT Sat Sep 12 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.
This Afternoon... Sunny. Near steady temperature in the lower 90s. West winds around 5 mph.
Tonight... Mostly clear in the evening, then becoming partly cloudy. Lows around 70. West winds around 5 mph in the evening, becoming light and variable.
Sunday... Partly sunny with isolated showers and thunderstorms. Highs in the upper 80s. North winds 5 to 10 mph. Chance of rain 20%.
Sunday Night... Partly cloudy in the evening, then becoming mostly cloudy. Isolated showers. Isolated thunderstorms after midnight. Lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 20%.
Monday... Mostly sunny. Highs in the upper 80s. East winds 5 to 10 mph.
Monday Night... Mostly clear. Hot. Lows around 70. Highs in the upper 90s. Heat index values up to 105.
Tuesday... Mostly clear. Hot. Lows around 70. Highs in the upper 90s. Heat index values up to 105.
Tuesday Night... Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Chance of rain 20%. Heat index values up to 100 early in the evening.
Wednesday... Mostly sunny. Hot with highs in the mid 90s. Heat index values up to 105 in the afternoon.
Wednesday Night... Partly cloudy. A slight chance of showers after midnight. Lows in the lower 70s. Chance of rain 20%. Heat index values up to 100 early in the evening.
Thursday... Mostly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 40%.
Thursday Night... Partly cloudy with a slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 60s. Chance of rain 30%.
POP = Probability of Precipitation
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