FPUS53 KLSX 081318 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 818 AM CDT Wed Jul 8 2026 ILZ100-101-MOZ061-063-064-082100- Madison IL-Saint Clair IL-Saint Charles MO-Saint Louis MO- Saint Louis City MO- Including the cities of Alton, Edwardsville, Belleville, Cahokia, Saint Charles, and Saint Louis 818 AM CDT Wed Jul 8 2026 .TODAY...Mostly sunny. Isolated showers and thunderstorms this afternoon. Highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 20 percent. .TONIGHT...Mostly clear. Isolated showers and thunderstorms in the evening. Lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent. .THURSDAY...Partly sunny. Scattered showers and thunderstorms in the afternoon. Highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 102. .THURSDAY NIGHT...Showers and thunderstorms. Humid with lows in the lower 70s. South winds 5 to 10 mph, becoming west after midnight. Chance of rain 80 percent. Heat index values up to 100 early in the evening. .FRIDAY...A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Humid with highs around 90. West winds around 5 mph. Chance of rain 70 percent. Heat index values up to 101. .FRIDAY NIGHT...Showers and thunderstorms likely. Lows in the lower 70s. Chance of rain 70 percent. .SATURDAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50 percent. .SATURDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. .SUNDAY...Mostly sunny. A chance of showers and thunderstorms, mainly in the morning. Highs in the upper 80s. Chance of rain 30 percent. .SUNDAY NIGHT AND MONDAY...Mostly clear. Lows around 70. Highs around 90. .MONDAY NIGHT...Clear. Lows in the lower 70s. .TUESDAY...Sunny. Highs in the lower 90s. Heat index values up to 100. $$ MOZ042-049-050-082100- Audrain MO-Osage MO-Callaway MO- Including the cities of Mexico and Fulton 818 AM CDT Wed Jul 8 2026 .TODAY...Sunny. Highs in the upper 80s. Southwest winds around 5 mph. .TONIGHT...Mostly clear. Lows around 70. South winds around 5 mph. .THURSDAY...Mostly sunny with scattered showers. Isolated thunderstorms in the morning, then scattered thunderstorms in the afternoon. Highs around 90. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 100. .THURSDAY NIGHT...Showers and thunderstorms. Lows in the lower 70s. West winds 5 to 10 mph. Chance of rain 80 percent. .FRIDAY...Partly sunny. A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Humid with highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 70 percent. .FRIDAY NIGHT...Thunderstorms likely. Showers likely. Lows in the lower 70s. Chance of rain 70 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. .SATURDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. .SUNDAY NIGHT AND MONDAY...Mostly clear. Lows in the upper 60s. Highs in the upper 80s. .MONDAY NIGHT...Clear. Lows around 70. .TUESDAY...Sunny. Highs in the lower 90s. $$ MOZ041-047-048-082100- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 818 AM CDT Wed Jul 8 2026 .TODAY...Sunny. Highs in the lower 90s. South winds around 5 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .THURSDAY...Mostly sunny with isolated thunderstorms. Scattered showers, mainly in the morning. Highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 102. .THURSDAY NIGHT...Showers and thunderstorms. Humid with lows in the lower 70s. Southwest winds around 5 mph. Chance of rain 80 percent. Heat index values up to 101 early in the evening. .FRIDAY...Partly sunny. A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Humid with highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 70 percent. .FRIDAY NIGHT...Showers and thunderstorms likely. Lows in the lower 70s. Chance of rain 70 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50 percent. .SATURDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. .SUNDAY NIGHT AND MONDAY...Mostly clear. Lows around 70. Highs in the lower 90s. .MONDAY NIGHT AND TUESDAY...Clear. Lows in the lower 70s. Highs in the lower 90s. Heat index values up to 100. $$ ILZ095>097-MOZ018-019-026-027-034>036-082100- Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO- Including the cities of Quincy, Mount Sterling, Pittsfield, Hannibal, and Bowling Green 818 AM CDT Wed Jul 8 2026 .TODAY...Sunny. Highs in the upper 80s. Southwest winds around 5 mph. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows around 70. South winds around 5 mph. .THURSDAY...Partly sunny in the morning, then becoming mostly cloudy. Scattered showers. Isolated thunderstorms in the morning, then scattered thunderstorms in the afternoon. Highs in the upper 80s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. .THURSDAY NIGHT...Showers likely. Thunderstorms. Lows around 70. North winds around 5 mph in the evening, becoming light and variable. Chance of rain 80 percent. .FRIDAY...Partly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Northwest winds around 5 mph. Chance of rain 50 percent. .FRIDAY NIGHT...Thunderstorms likely. Showers likely. Lows around 70. Chance of rain 70 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 60s. Highs in the upper 80s. Chance of rain 20 percent. .SUNDAY NIGHT AND MONDAY...Mostly clear. Lows in the upper 60s. Highs in the upper 80s. .MONDAY NIGHT...Clear. Lows in the lower 70s. .TUESDAY...Sunny. Highs in the lower 90s. $$ ILZ069-070-074-082100- Clinton IL-Marion IL-Washington IL- Including the cities of Centralia and Salem 818 AM CDT Wed Jul 8 2026 .TODAY...Mostly sunny. Scattered showers and thunderstorms this afternoon. Highs in the upper 80s. Light and variable winds, becoming south around 5 mph this afternoon. Chance of rain 30 percent. .TONIGHT...Partly cloudy with isolated showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent. .THURSDAY...Sunny in the morning, then partly sunny with numerous showers and thunderstorms in the afternoon. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 60 percent. Heat index values up to 102. .THURSDAY NIGHT...Showers and thunderstorms. Humid with lows in the lower 70s. South winds 5 to 10 mph with gusts up to 20 mph, becomingsouthwest after midnight. Chance of rain 80 percent. Heat index values up to 100 early in the evening. .FRIDAY...A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Humid with highs in the upper 80s. West winds around 5 mph. Chance of rain 70 percent. Heat index values up to 101. .FRIDAY NIGHT AND SATURDAY...Showers and thunderstorms likely. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 70 percent. .SATURDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows around 70. Chance of rain 40 percent. .SUNDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 30 percent. .SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows around 70. Highs around 90. Heat index values up to 100. $$ MOZ074-084-085-099-082100- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 818 AM CDT Wed Jul 8 2026 .TODAY...Mostly sunny. Scattered showers and thunderstorms this afternoon. Highs in the upper 80s. Light and variable winds, becoming south around 5 mph this afternoon. Chance of rain 40 percent. .TONIGHT...Partly cloudy with isolated showers and thunderstorms in the evening, then mostly clear after midnight. Lows around 70. South winds around 5 mph. Chance of rain 20 percent. .THURSDAY...Mostly sunny. Scattered showers and thunderstorms in the afternoon. Highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 40 percent. Heat index values up to 101. .THURSDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 60 percent. .FRIDAY...Mostly sunny with a chance of showers and thunderstorms. Humid with highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 50 percent. .FRIDAY NIGHT AND SATURDAY...Showers and thunderstorms likely. Lows in the lower 70s. Highs in the mid 80s. Chance of rain 70 percent. .SATURDAY NIGHT AND SUNDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Highs in the mid 80s. Chance of rain 50 percent. .SUNDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the upper 60s. Chance of rain 20 percent. .MONDAY THROUGH TUESDAY...Mostly clear. Highs in the upper 80s. Lows in the upper 60s. $$ MOZ051-052-060-082100- Montgomery MO-Lincoln MO-Warren MO- 818 AM CDT Wed Jul 8 2026 .TODAY...Sunny. Highs in the upper 80s. Southwest winds around 5 mph. .TONIGHT...Mostly clear. Lows around 70. South winds around 5 mph. .THURSDAY...Partly sunny. Isolated showers and thunderstorms in the morning, then scattered showers and thunderstorms in the afternoon. Highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 101. .THURSDAY NIGHT...Showers and thunderstorms. Humid with lows in the lower 70s. West winds 5 to 10 mph. Chance of rain 80 percent. .FRIDAY...A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Humid with highs in the upper 80s. West winds around 5 mph. Chance of rain 70 percent. .FRIDAY NIGHT...Thunderstorms likely. Showers likely. Lows around 70. Chance of rain 70 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50 percent. .SATURDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. .SUNDAY NIGHT AND MONDAY...Mostly clear. Lows in the upper 60s. Highs in the upper 80s. .MONDAY NIGHT...Clear. Lows around 70. .TUESDAY...Sunny. Highs in the lower 90s. Heat index values up to 100. $$ ILZ058-059-098-099-082100- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 818 AM CDT Wed Jul 8 2026 .TODAY...Sunny. Highs in the upper 80s. Southeast winds around 5 mph, becoming south around 5 mph this afternoon. .TONIGHT...Mostly clear. Lows around 70. South winds around 5 mph. .THURSDAY...Mostly sunny in the morning, then mostly cloudy with scattered showers and thunderstorms in the afternoon. Highs around 90. Southwest winds 5 to 10 mph. Chance of rain 50 percent. .THURSDAY NIGHT...Showers and thunderstorms. Lows around 70. Southwest winds 5 to 10 mph, becoming west after midnight. Chance of rain 80 percent. .FRIDAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Humid with highs in the upper 80s. West winds around 5 mph. Chance of rain 50 percent. .FRIDAY NIGHT...Thunderstorms likely. Showers likely. Lows in the upper 60s. Chance of rain 70 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. .SATURDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the upper 60s. Chance of rain 50 percent. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. .SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows in the upper 60s. Highs around 90. Heat index values up to 100. $$ ILZ060-064-065-082100- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 818 AM CDT Wed Jul 8 2026 .TODAY...Mostly sunny. Isolated showers and thunderstorms this afternoon. Highs in the mid 80s. Light and variable winds, becoming south around 5 mph this afternoon. Chance of rain 20 percent. .TONIGHT...Mostly clear. Isolated showers and thunderstorms in the evening. Lows around 70. South winds around 5 mph. Chance of rain 20 percent. .THURSDAY...Mostly sunny. Numerous showers and thunderstorms in the afternoon. Humid with highs around 90. Southwest winds 5 to 10 mph. Chance of rain 60 percent. .THURSDAY NIGHT...Showers and thunderstorms. Lows in the lower 70s. Southwest winds around 5 mph. Chance of rain 80 percent. .FRIDAY...Showers and thunderstorms likely. Humid with highs in the upper 80s. West winds around 5 mph. Chance of rain 70 percent. .FRIDAY NIGHT...Thunderstorms likely. Showers likely. Lows in the upper 60s. Chance of rain 70 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. .SATURDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 50 percent. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 20 percent. .SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows in the upper 60s. Highs in the upper 80s. $$ ILZ079-MOZ075-082100- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 818 AM CDT Wed Jul 8 2026 .TODAY...Mostly sunny. Isolated showers and thunderstorms this morning, then scattered showers and thunderstorms this afternoon. Highs in the upper 80s. Light and variable winds, becoming south around 5 mph this afternoon. Chance of rain 30 percent. .TONIGHT...Partly cloudy with isolated showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent. .THURSDAY...Mostly sunny. Scattered showers and thunderstorms inthe afternoon. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Gusts up to 25 mph in the afternoon. Chance of rain 50 percent. Heat index values up to 103. .THURSDAY NIGHT...Thunderstorms likely. Showers likely. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 70 percent. Heat index values up to 101 early in the evening. .FRIDAY...A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Humid with highs around 90. West winds around 5 mph. Chance of rain 70 percent. Heat index values up to 102 in the afternoon. .FRIDAY NIGHT AND SATURDAY...Showers and thunderstorms likely. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 70 percent. Heat index values up to 100. .SATURDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows around 70. Chance of rain 50 percent. .SUNDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 40 percent. .SUNDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the upper 60s. Chance of rain 20 percent. .MONDAY THROUGH TUESDAY...Mostly clear. Highs around 90. Lows around 70. Heat index values up to 100. $$ MOZ059-062-072-073-082100- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 818 AM CDT Wed Jul 8 2026 .TODAY...Sunny. Isolated showers and thunderstorms this afternoon. Highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 20 percent. .TONIGHT...Mostly clear. Lows around 70. South winds around 5 mph. .THURSDAY...Mostly sunny. Isolated showers and thunderstorms in the morning, then scattered showers and thunderstorms in the afternoon. Highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 100. .THURSDAY NIGHT...Showers and thunderstorms likely. Lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 70 percent. .FRIDAY...A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Humid with highs in the upper 80s. West winds around 5 mph. Chance of rain 70 percent. .FRIDAY NIGHT AND SATURDAY...Showers and thunderstorms likely. Lows around 70. Highs in the upper 80s. Chance of rain 70 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Highs in the upper 80s. Chance of rain 50 percent. .SUNDAY NIGHT...Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the upper 60s. Chance of rain 20 percent. .MONDAY THROUGH TUESDAY...Mostly clear. Highs around 90. Lows in the upper 60s. Heat index values up to 100. $$ ILZ102-MOZ065-082100- Monroe IL-Jefferson MO- 818 AM CDT Wed Jul 8 2026 .TODAY...Mostly sunny. Isolated showers and thunderstorms this afternoon. Highs in the upper 80s. Light and variable winds, becoming south around 5 mph this afternoon. Chance of rain 20 percent. .TONIGHT...Mostly clear. Isolated showers and thunderstorms in the evening. Lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent. .THURSDAY...Mostly sunny. Scattered showers and thunderstorms in the afternoon. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 103. .THURSDAY NIGHT...Showers and thunderstorms likely. Humid with lows in the lower 70s. Southwest winds around 5 mph. Chance of rain 70 percent. Heat index values up to 101 early in the evening. .FRIDAY...A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Humid with highs around 90. West winds around 5 mph. Chance of rain 70 percent. Heat index values up to 102. .FRIDAY NIGHT AND SATURDAY...Showers and thunderstorms likely. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 70 percent. .SATURDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows around 70. Chance of rain 50 percent. .SUNDAY...Partly sunny. A chance of showers and thunderstorms, mainly in the morning. Highs in the upper 80s. Chance of rain 40 percent. .SUNDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the upper 60s. Chance of rain 20 percent. .MONDAY...Sunny. Highs around 90. .MONDAY NIGHT...Clear. Lows around 70. .TUESDAY...Sunny. Highs in the lower 90s. Heat index values up to 100. $$