FPUS53 KLSX 191928 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 228 PM CDT Tue May 19 2026 ILZ100-101-MOZ061-063-064-200300- 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 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 70s. Temperature falling into the lower 70s late. West winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent. .TONIGHT...Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the mid 50s. North winds 5 to 10 mph. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy. A slight chance of showers in the morning. Cooler with highs in the mid 60s. North winds 5 to 10 mph. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 50s. Northeast winds 5 to 10 mph. .THURSDAY...Partly sunny. Highs in the lower 70s. Northeast winds 5 to 10 mph. .THURSDAY NIGHT...Mostly cloudy. A chance of showers in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the mid 50s. Chance of rain 70 percent. .FRIDAY...A chance of thunderstorms. Showers. Highs in the lower 70s. Chance of rain 90 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 50s. Highs around 80. Chance of rain 20 percent. .SATURDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows around 60. Chance of rain 50 percent. .SUNDAY...Mostly cloudy with a slight chance of showers in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40 percent. .SUNDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 60s. Chance of rain 40 percent. .MEMORIAL DAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ MOZ042-049-050-200300- Audrain MO-Osage MO-Callaway MO- Including the cities of Mexico and Fulton 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Cloudy with a chance of showers and thunderstorms. Highs in the upper 60s. Temperature falling into the lower 60s late. Northwest winds around 10 mph with gusts up to 20 mph. Chance of rain 50 percent. .TONIGHT...Mostly cloudy. A slight chance of showers after midnight. Cooler with lows in the lower 50s. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. .WEDNESDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the upper 40s. Northeast winds 5 to 10 mph. .THURSDAY...Partly sunny in the morning, then mostly cloudy with a chance of showers in the afternoon. Highs in the upper 60s. East winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 30 percent. .THURSDAY NIGHT...Cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 50s. Chance of rain 70 percent. .FRIDAY...Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs around 70. Chance of rain 70 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the upper 70s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly cloudy with a chance of showers with a slightchance of thunderstorms. Lows in the upper 50s. Chance of rain 40 percent. .SUNDAY AND SUNDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms. Highs around 80. Lows in the upper 50s. Chance of rain 20 percent. .MEMORIAL DAY...Partly sunny with a slight chance of thunderstorms. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ MOZ041-047-048-200300- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Cloudy with a slight chance of showers and thunderstorms. Highs in the mid 60s. Temperature falling to around 60 late. Northwest winds around 10 mph with gusts up to 20 mph. Chance of rain 20 percent. .TONIGHT...Cloudy. A slight chance of showers after midnight. Cooler with lows in the lower 50s. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. .WEDNESDAY...Partly sunny. Highs in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the lower 50s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs around 70. East winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 40 percent. .THURSDAY NIGHT...Cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 50s. Chance of rain 70 percent. .FRIDAY...Showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 80 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the upper 70s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the upper 50s. Chance of rain 40 percent. .SUNDAY AND SUNDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms. Highs in the lower 80s. Lows in the upper 50s. Chance of rain 20 percent. .MEMORIAL DAY...Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. $$ ILZ095>097-MOZ018-019-026-027-034>036-200300- 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 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Mostly cloudy with a slight chance of showers and thunderstorms. Near steady temperature in the lower 60s. Temperature falling into the lower 60s late. Northwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. .TONIGHT...Mostly cloudy. A slight chance of showers after midnight. Cooler with lows around 50. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. .WEDNESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 40s. Northeast winds 5 to 10 mph with gusts up to 20 mph. .THURSDAY...Partly sunny in the morning, then mostly cloudy with a slight chance of showers in the afternoon. Highs in the upper 60s. East winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. .THURSDAY NIGHT...Cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the lower 50s. Chance of rain 60 percent. .FRIDAY...Showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 80 percent. .FRIDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 50s. Chance of rain 20 percent. .SATURDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 70s. .SATURDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 50s. Chance of rain 40 percent. .SUNDAY...Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 50s. .MEMORIAL DAY...Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 20 percent. $$ ILZ069-070-074-200300- Clinton IL-Marion IL-Washington IL- Including the cities of Centralia and Salem 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Mostly cloudy with a chance of showers and thunderstorms. Highs in the lower 80s. Temperature falling into the mid 70s late. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent. .TONIGHT...Mostly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the upper 50s. Northwest winds 5 to 10 mph. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy. A slight chance of showers and thunderstorms in the morning. Much cooler with highs in the mid 60s. North winds 5 to 10 mph. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the lower 50s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs in the lower 70s. Northeast winds 5 to 10 mph. .THURSDAY NIGHT...Mostly cloudy. A chance of showers in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the upper 50s. Chance of rain 70 percent. .FRIDAY...A chance of thunderstorms. Showers. Highs in the lower 70s. Chance of rain 90 percent. .FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening. Lows in the upper 50s. Chance of rain 50 percent. .SATURDAY...Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 20 percent. .SATURDAY NIGHT...A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 50 percent. .SUNDAY...Mostly cloudy with a chance of showers. A chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 40 percent. .SUNDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 60s. Chance of rain 40 percent. .MEMORIAL DAY...Mostly cloudy with a chance of showers in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ MOZ074-084-085-099-200300- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Showers and thunderstorms likely. Near steady temperature in the mid 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 60 percent. .TONIGHT...Mostly cloudy. Showers and thunderstorms likely, mainly in the evening. Cooler with lows in the mid 50s. Northwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 60 percent. .WEDNESDAY...Mostly cloudy. A slight chance of showers and thunderstorms in the morning. Cooler with highs in the mid 60s. North winds 5 to 10 mph. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the lower 50s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly cloudy. A chance of showers in the afternoon. Highs in the lower 70s. Northeast winds around 5 mph. Chance of rain 30 percent. .THURSDAY NIGHT...Cloudy. A chance of showers in the evening, then showers with a slight chance of thunderstorms after midnight. Lows in the upper 50s. Chance of rain 80 percent. .FRIDAY...Showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 80 percent. .FRIDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the upper 50s. Chance of rain 40 percent. .SATURDAY...Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. .SATURDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the upper 50s. Chance of rain 50 percent. .SUNDAY...Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 50 percent. .SUNDAY NIGHT...Mostly cloudy with a slight chance of thunderstorms. A chance of showers. Lows around 60. Chance of rain 50 percent. .MEMORIAL DAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ MOZ051-052-060-200300- Montgomery MO-Lincoln MO-Warren MO- 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Mostly cloudy with a chance of showers and thunderstorms. Highs in the lower 70s. Temperature falling into the mid 60s late. Northwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 40 percent. .TONIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a slight chance of showers. Cooler with lows in the lower 50s. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. .WEDNESDAY...Mostly cloudy with a slight chance of showers in the morning, then partly sunny in the afternoon. Highs in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the upper 40s. Northeast winds 5 to 10 mph. .THURSDAY...Partly sunny. A slight chance of showers in the afternoon. Highs in the upper 60s. East winds 5 to 10 mph. Chance of rain 20 percent. .THURSDAY NIGHT...Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 50s. Chance of rain 60 percent. .FRIDAY...A chance of thunderstorms. Showers. Highs in the upper 60s. Chance of rain 80 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the upper 70s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the mid 50s. Highs around 80. Chance of rain 40 percent. .SUNDAY NIGHT...Mostly cloudy with a slight chance of showers. A slight chance of thunderstorms after midnight. Lows in the upper 50s. Chance of rain 20 percent. .MEMORIAL DAY...Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40 percent. $$ ILZ058-059-098-099-200300- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Temperature falling into the upper 60s late. West winds 10 to 15 mph. Chance of rain 50 percent. .TONIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a slight chance of showers. Cooler. Less humid with lows in the lower 50s. North winds 10 to 15 mph. Chance of rain 20 percent. .WEDNESDAY...Mostly cloudy. A slight chance of showers in the morning. Cooler withhighs in the lower 60s. Northeast winds 10 to 15 mph. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 40s. Northeast winds 5 to 10 mph. .THURSDAY...Partly sunny. Highs around 70. East winds 5 to 10 mph. .THURSDAY NIGHT...Mostly cloudy with a 50 percent chance of showers. Lows in the lower 50s. .FRIDAY...A chance of thunderstorms. Showers. Highs in the upper 60s. Chance of rain 80 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the upper 70s. Chance of rain 20 percent. .SATURDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the mid 50s. Chance of rain 40 percent. .SUNDAY AND SUNDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Highs around 80. Lows in the upper 50s. Chance of rain 20 percent. .MEMORIAL DAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40 percent. $$ ILZ060-064-065-200300- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Mostly cloudy with a chance of showers and thunderstorms. Highs around 80. Temperature falling into the mid 70s late. West winds around 10 mph with gusts up to 20 mph. Chance of rain 50 percent. .TONIGHT...Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Cooler with lows in the mid 50s. North winds 5 to 10 mph. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy. A slight chance of showers in the morning. Much cooler with highs in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 40s. Northeast winds 5 to 10 mph. .THURSDAY...Partly sunny. Highs in the upper 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. .THURSDAY NIGHT...Mostly cloudy. A slight chance of showers in the evening, then showers likely after midnight. Lows in the mid 50s. Chance of rain 60 percent. .FRIDAY...A chance of thunderstorms. Showers. Highs around 70. Chance of rain 80 percent. .FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening. Lows in the mid 50s. Chance of rain 50 percent. .SATURDAY...Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 20 percent. .SATURDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the upper 50s. Chance of rain 40 percent. .SUNDAY...Mostly cloudy with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 40 percent. .SUNDAY NIGHT...Mostly cloudy with a slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows around 60. Chance of rain 30 percent. .MEMORIAL DAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 40 percent. $$ ILZ079-MOZ075-200300- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Showers and thunderstorms likely. Highs in the lower 80s. Temperature falling into the mid 70s late. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 60 percent. .TONIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers. Lows in the mid 50s. Northwest winds 5 to 10 mph, becoming north after midnight. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy. A slight chance of showers and thunderstorms in the morning. Much cooler with highs in the mid 60s. North winds 5 to 10 mph. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the lower 50s. Northeast winds 5 to 10 mph. .THURSDAY...Partly sunny in the morning, then becoming mostly cloudy. Highs in the lower 70s. Northeast winds 5 to 10 mph. .THURSDAY NIGHT...Cloudy. A chance of showers in the evening, then showers with a slight chance of thunderstorms after midnight. Lows in the mid 50s. Chance of rain 80 percent. .FRIDAY...A chance of thunderstorms. Showers. Highs in the mid 70s. Chance of rain 90 percent. .FRIDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 50s. Chance of rain 30 percent. .SATURDAY...Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs around 80. Chance of rain 40 percent. .SATURDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows around 60. Chance of rain 50 percent. .SUNDAY...Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 50 percent. .SUNDAY NIGHT...Mostly cloudy with a slight chance of thunderstorms. A chance of showers. Lows in the lower 60s. Chance of rain 50 percent. .MEMORIAL DAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ MOZ059-062-072-073-200300- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Mostly cloudy with showers likely with a chance of thunderstorms. Near steady temperature around 70. West winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 60 percent. .TONIGHT...Cloudy. A chance of showers and thunderstorms, mainly in the evening. Cooler with lows in the lower 50s. North winds around 5 mph. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy. A slight chance of showers and thunderstorms in the morning. Cooler with highs in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the lower 50s. Northeast winds around 5 mph. .THURSDAY...Partly sunny in the morning, then mostly cloudy with a slight chance of showers in the afternoon. Highs in the lower 70s. East winds 5 to 10 mph. Chance of rain 20 percent. .THURSDAY NIGHT...Cloudy. A chance of showers in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the mid 50s. Chance of rain 70 percent. .FRIDAY...A chance of thunderstorms. Showers. Highs in the lower 70s. Chance of rain 80 percent. .FRIDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 50s. Chance of rain 20 percent. .SATURDAY...Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs around 80. Chance of rain 50 percent. .SATURDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the upper 50s. Chance of rain 50 percent. .SUNDAY...Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. .SUNDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 50s. Chance of rain 20 percent. .MEMORIAL DAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ ILZ102-MOZ065-200300- Monroe IL-Jefferson MO- 228 PM CDT Tue May 19 2026 .THIS AFTERNOON...Mostly cloudy with showers likely with a chance of thunderstorms. Highs in the upper 70s. Temperature falling into the lower 70s late. Southwest winds 5 to 10 mph. Chance of rain 60 percent. .TONIGHT...Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Cooler with lows in the mid 50s. North winds 5 to 10 mph. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy. A slight chance of showers and thunderstorms in the morning. Much cooler with highs in the lower 60s. North winds 5 to 10 mph. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the lower 50s. Northeast winds around 5 mph. .THURSDAY...Partly sunny in the morning, then becoming mostly cloudy. Highs in the lower 70s. Northeast winds 5 to 10 mph. .THURSDAY NIGHT...Mostly cloudy. A chance of showers in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the mid 50s. Chance of rain 70 percent. .FRIDAY...A chance of thunderstorms. Showers. Highs in the lower 70s. Chance of rain 80 percent. .FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening. Lows in the upper 50s. Chance of rain 30 percent. .SATURDAY...Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs around 80. Chance of rain 40 percent. .SATURDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the upper 50s. Chance of rain 50 percent. .SUNDAY...Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. .SUNDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows around 60. Chance of rain 50 percent. .MEMORIAL DAY...Partly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$