Day A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 3 to 6 mph. Chance of precipitation is 50%.
Night Partly cloudy, with a low around 69. Light southeast wind.
Includes the Counties: Madison County Il,
Saint Clair County Il,
Monroe County Il,
Saint Charles County Mo,
Saint Louis County Mo,
Saint Louis City County Mo,
Jefferson County Mo,
Including The Cities Of Alton, Edwardsville, Belleville, Cahokia,
Saint Charles, And Saint Louis