FPUS53 KLSX 232358 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 657 PM CDT Sun Aug 23 2026 ILZ100-101-MOZ061-063-064-240700- 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 658 PM CDT Sun Aug 23 2026 .TONIGHT...Partly cloudy this evening, then becoming mostly clear. Areas of dense fog after midnight. Lows in the upper 50s. North winds around 5 mph this evening, becoming light and variable. .MONDAY...Areas of dense fog in the morning. Sunny. Highs in the lower 80s. East winds around 5 mph. .MONDAY NIGHT...Mostly clear. Lows in the lower 60s. East winds around 5 mph. .TUESDAY...Sunny. Highs in the mid 80s. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 60s. East winds around 5 mph in the evening, becoming light and variable. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. .WEDNESDAY 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. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs in the upper 80s. Lows in the mid 60s. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the lower 70s. Chance of rain 30 percent. .SUNDAY...Partly sunny. A slight chance of showers in the morning. Highs around 90. Chance of rain 20 percent. $$ MOZ042-049-050-240700- Audrain MO-Osage MO-Callaway MO- Including the cities of Mexico and Fulton 658 PM CDT Sun Aug 23 2026 .TONIGHT...Partly cloudy. Areas of dense fog after midnight. Lows in the upper 50s. North winds around 5 mph, becoming east after midnight. .MONDAY...Areas of dense fog in the morning. Mostly sunny. Highs in the lower 80s. Southeast winds around 5 mph. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. East winds around 5 mph. .TUESDAY...Mostly sunny. Highs in the mid 80s. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 60s. Southeast winds around 5 mph. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. .WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .FRIDAY...Mostly sunny. Highs in the mid 80s. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers after midnight. Lows in the mid 60s. Chance of rain 20 percent. .SATURDAY...Partly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 20 percent. .SUNDAY...Partly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ041-047-048-240700- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 658 PM CDT Sun Aug 23 2026 .TONIGHT...Mostly cloudy this evening, then partly cloudy with a slight chance of showers after midnight. Areas of dense fog after midnight. Lows around 60. North winds around 5 mph, becoming east after midnight. Chance of rain 20 percent. .MONDAY...Partly sunny. A slight chance of showers in the morning. Areas of dense fog in the morning. Highs in the lower 80s. East winds around 5 mph. Chance of rain 20 percent. .MONDAY NIGHT...Mostly clear. Lows in the mid 60s. East winds around 5 mph. .TUESDAY...Mostly sunny. Highs in the upper 80s. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. East winds around 5 mph in the evening, becoming light and variable. Chance of rain 20 percent. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs around 90. Chance of rain 20 percent. .WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Lows in the mid 60s. Highs in the upper 80s. .FRIDAY...Mostly sunny. Highs in the upper 80s. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers after midnight. Lows in the upper 60s. Chance of rain 20 percent. .SATURDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs around 90. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 20 percent. .SUNDAY...Partly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. $$ ILZ095>097-MOZ018-019-026-027-034>036-240700- Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO- Including the cities of Quincy, Mount Sterling, Pittsfield, Hannibal, and Bowling Green 658 PM CDT Sun Aug 23 2026 .TONIGHT...Mostly clear. Patchy dense fog after midnight. Lows in the mid 50s. North winds around 5 mph this evening, becoming light and variable. .MONDAY...Areas of dense fog in the morning. Mostly sunny. Highs in the lower 80s. Southeast winds around 5 mph. .MONDAY NIGHT...Mostly clear. Lows in the lower 60s. East winds around 5 mph. .TUESDAY...Mostly sunny. Highs in the mid 80s. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 60s. Southeast winds around 5 mph in the evening, becoming light and variable. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. .WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .FRIDAY...Mostly sunny. Highs in the mid 80s. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers after midnight. Lows in the mid 60s. Chance of rain 20 percent. .SATURDAY...Partly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows around 70. Chance of rain 40 percent. .SUNDAY...Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the upper 80s. Chance of rain 40 percent. $$ ILZ069-070-074-240700- Clinton IL-Marion IL-Washington IL- Including the cities of Centralia and Salem 658 PM CDT Sun Aug 23 2026 .TONIGHT...Mostly clear. Lows in the upper 50s. North winds around 5 mph this evening, becoming light and variable. .MONDAY...Sunny. Highs in the lower 80s. Light and variable winds. .MONDAY NIGHT...Mostly clear. Lows in the upper 50s. Light and variable winds. .TUESDAY...Sunny. Highs in the mid 80s. East winds around 5 mph. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. Light and variable winds. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the upper 60s. Chance of rain 40 percent. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs in the upper 80s. Lows in the mid 60s. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper 80s. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 20 percent. .SUNDAY...Partly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ074-084-085-099-240700- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 658 PM CDT Sun Aug 23 2026 .TONIGHT...Mostly cloudy this evening, then becoming partly cloudy. Areas of dense fog after midnight. Lows around 60. North winds around 5 mph this evening, becoming light and variable. .MONDAY...Mostly sunny. A slight chance of showers in the morning. Areas of dense fog in the morning. Highs in the lower 80s. Southeast winds around 5 mph. Chance of rain 20 percent. .MONDAY NIGHT...Partly cloudy. Lows in the lower 60s. East winds around 5 mph in the evening, becoming light and variable. .TUESDAY...Mostly sunny. Highs in the mid 80s. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. A slight chance of showers after midnight. Lows in the mid 60s. Light and variable winds. Chance of rain 20 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms. Highs in the upper 80s. Lows in the mid 60s. Chance of rain 20 percent. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs in the upper 80s. Lows in the lower 60s. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers in the evening, then mostly clear after midnight. Lows in the mid 60s. Chance of rain 20 percent. .SATURDAY AND SATURDAY NIGHT...Partly cloudy. Highs in the mid 80s. Lows in the upper 60s. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ051-052-060-240700- Montgomery MO-Lincoln MO-Warren MO- 658 PM CDT Sun Aug 23 2026 .TONIGHT...Partly cloudy. Areas of dense fog after midnight. Lows in the mid 50s. North winds around 5 mph this evening, becoming light and variable. .MONDAY...Areas of dense fog in the morning. Mostly sunny. Highs in the lower 80s. Southeast winds around 5 mph. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s. East winds around 5 mph. .TUESDAY...Mostly sunny. Highs in the mid 80s. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 60s. Light and variable winds. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. .WEDNESDAY NIGHT THROUGH FRIDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers after midnight. Lows in the mid 60s. Chance of rain 20 percent. .SATURDAY...Partly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 20 percent. .SUNDAY...Partly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent. $$ ILZ058-059-098-099-240700- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 658 PM CDT Sun Aug 23 2026 .TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the mid 50s. North winds around 5 mph this evening, becoming light and variable. .MONDAY...Areas of dense fog in the morning. Sunny. Highs in the lower 80s. Southeast winds around 5 mph, becoming east in the afternoon. .MONDAY NIGHT...Mostly clear. Lows in the upper 50s. East winds around 5 mph. .TUESDAY...Mostly sunny. Highs in the mid 80s. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 60s. Southeast winds around 5 mph. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. .WEDNESDAY NIGHT...Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the mid 60s. Chance of rain 20 percent. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs in the mid 80s. Lows in the lower 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 60s. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 60s. Chance of rain 30 percent. .SUNDAY...Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. $$ ILZ060-064-065-240700- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 658 PM CDT Sun Aug 23 2026 .TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the mid 50s. North winds around 5 mph this evening, becoming light and variable. .MONDAY...Sunny. Highs in the lower 80s. Light and variable winds. .MONDAY NIGHT...Mostly clear. Lows in the upper 50s. Light and variable winds. .TUESDAY...Sunny. Highs in the mid 80s. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 60s. Southeast winds around 5 mph in the evening, becoming light and variable. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 60s. Chance of rain 40 percent. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs in the mid 80s. Lows in the lower 60s. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. 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 percent. .SUNDAY...Partly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. $$ ILZ079-MOZ075-240700- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 658 PM CDT Sun Aug 23 2026 .TONIGHT...Partly cloudy this evening, then clearing. Areas of dense fog after midnight. Lows in the upper 50s. North winds around 5 mph this evening, becoming light and variable. .MONDAY...Areas of dense fog in the morning. Sunny. Highs in the lower 80s. Southeast winds around 5 mph. .MONDAY NIGHT...Mostly clear. Lows around 60. East winds around 5 mph. .TUESDAY...Sunny. Highs in the mid 80s. East winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 60s. East winds around 5 mph in the evening, becoming light and variable. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the upper 60s. Chance of rain 20 percent. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs in the upper 80s. Lows in the mid 60s. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper 80s. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 20 percent. .SUNDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ059-062-072-073-240700- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 658 PM CDT Sun Aug 23 2026 .TONIGHT...Mostly cloudy this evening, then becoming partly cloudy. Areas of dense fog after midnight. Lows in the upper 50s. Light and variable winds. .MONDAY...Areas of dense fog in the morning. Mostly sunny. Highs in the lower 80s. Southeast winds around 5 mph. .MONDAY NIGHT...Partly cloudy. Lows in the lower 60s. East winds around 5 mph. .TUESDAY...Mostly sunny. Highs in the mid 80s. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 60s. East winds around 5 mph in the evening, becoming light and variable. .WEDNESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. .WEDNESDAY NIGHT THROUGH FRIDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. A 20 percent chance of showers. Lows in the mid 60s. Highs in the upper 80s. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 20 percent. .SUNDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. $$ ILZ102-MOZ065-240700- Monroe IL-Jefferson MO- 658 PM CDT Sun Aug 23 2026 .TONIGHT...Partly cloudy this evening, then clearing. Areas of dense fog after midnight. Lows in the upper 50s. North winds around 5 mph this evening, becoming light and variable. .MONDAY...Areas of dense fog in the morning. Sunny. Highs in the lower 80s. Southeast winds around 5 mph. .MONDAY NIGHT...Mostly clear. Lows in the lower 60s. East winds around 5 mph in the evening, becoming light and variable. .TUESDAY...Mostly sunny. Highs in the mid 80s. East winds around 5 mph. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 60s. East winds around 5 mph in the evening, becoming light and variable. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 60s. Chance of rain 20 percent. .THURSDAY THROUGH FRIDAY...Mostly clear. Highs in the upper 80s. Lows in the mid 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 60s. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 20 percent. .SUNDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs around 90. Chance of rain 20 percent. $$