Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
708 FPUS53 KLSX 110302 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 1002 PM CDT Thu Sep 10 2026 ILZ100-101-MOZ061-063-064-111100- 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 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy. Patchy fog after midnight. Lows in the upper 60s. North winds around 5 mph this evening, becoming light and variable. .FRIDAY...Mostly cloudy. Patchy fog in the morning. A slight chance of showers in the afternoon. Highs in the lower 80s. Southeast winds around 5 mph. Chance of rain 20 percent. .FRIDAY NIGHT...Partly cloudy. Lows in the upper 60s. South winds around 5 mph. .SATURDAY...Mostly sunny. Humid with highs around 90. Southwest winds around 5 mph. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 60s. Southwest winds around 5 mph in the evening, becoming light and variable. .SUNDAY...Mostly 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. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 60s. .MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the lower 90s. Lows around 70. .TUESDAY...Sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100 in the afternoon. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 40 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Partly cloudy. A chance of showers with a slight chance of thunderstorms. Highs in the upper 80s. Lows in the mid 60s. Chance of rain 50 percent. .THURSDAY...Partly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ MOZ049-050-111100- Osage MO-Callaway MO- Including the city of Fulton 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy. Patchy fog after midnight. Lows in the mid 60s. Northeast winds around 5 mph. .FRIDAY...Patchy fog in the morning. Mostly cloudy with a slight chance of showers in the morning, then mostly sunny in the afternoon. Highs in the lower 80s. Southeast winds around 5 mph. Chance of rain 20 percent. .FRIDAY NIGHT...Mostly clear. Lows in the mid 60s. Southeast winds around 5 mph. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers. A slight chance of thunderstorms after midnight. Lows in the mid 60s. South winds around 5 mph, becoming east after midnight. Chance of rain 20 percent. .SUNDAY...Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the upper 80s. Chance of rain 40 percent. .SUNDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the upper 60s. .MONDAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows in the upper 60s. .TUESDAY...Sunny. A chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent. .TUESDAY NIGHT...Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 60s. Chance of rain 50 percent. .WEDNESDAY...Mostly sunny with a 50 percent chance of showers. Highs in the mid 80s. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Chance of rain 50 percent. .THURSDAY...Partly sunny with a slight chance of thunderstorms. A chance of showers. Highs in the upper 70s. Chance of rain 50 percent. $$ MOZ042-111100- Audrain MO- Including the city of Mexico 1002 PM CDT Thu Sep 10 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT FRIDAY... .TONIGHT...Mostly cloudy. Areas of fog after midnight. Lows in the lower 60s. Northeast winds around 5 mph this evening, becoming light and variable. .FRIDAY...Mostly cloudy in the morning, then becoming mostly sunny. Areas of fog in the morning. Highs around 80. Southeast winds around 5 mph. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 60s. South winds around 5 mph. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Southwest winds around 5 mph. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the mid 60s. Southwest winds around 5 mph, becoming northeast after midnight. Chance of rain 30 percent. .SUNDAY...Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the lower 80s. Chance of rain 50 percent. .SUNDAY NIGHT AND MONDAY...Partly cloudy. Lows in the mid 60s. Highs in the mid 80s. .MONDAY NIGHT...Mostly clear. Lows in the upper 60s. .TUESDAY...Mostly sunny. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 40 percent. .TUESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the lower 60s. Chance of rain 50 percent. .WEDNESDAY...Partly sunny with a 50 percent chance of showers. Highs in the upper 70s. .WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the lower 60s. Highs in the mid 70s. Chance of rain 50 percent. $$ MOZ041-047-048-111100- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy. Patchy fog after midnight. Lows in the mid 60s. Northeast winds around 5 mph this evening, becoming light and variable. .FRIDAY...Mostly cloudy in the morning, then becoming mostly sunny. Areas of fog in the morning. Highs in the lower 80s. Southeast winds around 5 mph. .FRIDAY NIGHT...Mostly clear. Lows in the upper 60s. Southeast winds around 5 mph. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers. A slight chance of thunderstorms after midnight. Lows in the upper 60s. Southeast winds around 5 mph, becoming east after midnight. Chance of rain 20 percent. .SUNDAY...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 upper 80s. Chance of rain 50 percent. .SUNDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the upper 60s. .MONDAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows around 70. .TUESDAY...Sunny. A chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 40 percent. .TUESDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Chance of rain 50 percent. .WEDNESDAY...Partly sunny with a 50 percent chance of showers. Highs in the mid 80s. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Chance of rain 50 percent. .THURSDAY...Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the upper 70s. Chance of rain 50 percent. $$ ILZ095>097-MOZ018-019-026-027-034>036-111100- 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 1002 PM CDT Thu Sep 10 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT FRIDAY... .TONIGHT...Partly cloudy this evening, then becoming mostly cloudy. Areas of fog after midnight. Lows in the mid 60s. Northeast winds around 5 mph this evening, becoming light and variable. .FRIDAY...Mostly cloudy in the morning, then becoming mostly sunny. Areas of fog in the morning. Highs in the lower 80s. Southeast winds around 5 mph. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. South winds around 5 mph. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. A slight chance of thunderstorms. A chance of showers, mainly in the evening. Lows in the mid 60s. North winds around 5 mph. 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 lower 80s. Chance of rain 50 percent. .SUNDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 20 percent. .MONDAY...Mostly sunny. Highs in the upper 80s. .MONDAY NIGHT...Mostly clear with a slight chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 20 percent. .TUESDAY...Mostly sunny. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent. .TUESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of thunderstorms in the evening. Showers likely. Lows in the lower 60s. Chance of rain 70 percent. .WEDNESDAY...Showers likely in the morning, then partly sunny with a chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 70 percent. .WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the lower 60s. Highs in the mid 70s. Chance of rain 50 percent. $$ ILZ069-070-074-111100- Clinton IL-Marion IL-Washington IL- Including the cities of Centralia and Salem 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy. A slight chance of showers this evening. Patchy fog after midnight. Lows in the upper 60s. North winds around 5 mph this evening, becoming light and variable. Chance of rain 20 percent. .FRIDAY...Mostly cloudy. Patchy fog in the morning. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the lower 80s. Southeast winds around 5 mph. Chance of rain 40 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A 20 percent chance of showers. Lows in the upper 60s. Light and variable winds. .SATURDAY...Mostly sunny. Humid with highs in the upper 80s. Southwest winds around 5 mph. .SATURDAY NIGHT...Mostly clear. Lows in the upper 60s. Light and variable winds. .SUNDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 60s. .MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the upper 80s. Lows in the upper 60s. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly clear with a chance of showers. Lows in the upper 60s. Chance of rain 40 percent. .WEDNESDAY...Mostly sunny with a 40 percent chance of showers. Highs in the upper 80s. .WEDNESDAY NIGHT...A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 40 percent. .THURSDAY...Mostly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ MOZ074-084-085-099-111100- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy with a 40 percent chance of showers. Patchy fog after midnight. Lows in the upper 60s. North winds around 5 mph this evening, becoming light and variable. .FRIDAY...Patchy fog in the morning. Cloudy with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Light and variable winds, becoming southeast around 5 mph in the afternoon. Chance of rain 50 percent. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy after midnight. Lows in the mid 60s. Light and variable winds. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Highs in the upper 80s. Southwest winds around 5 mph. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. Light and variable winds. .SUNDAY...Mostly sunny. A slight chance of showers in the morning. Highs around 90. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 60s. .MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the upper 80s. Lows in the upper 60s. .TUESDAY...Sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100 in the afternoon. .TUESDAY NIGHT...Mostly clear. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the mid 60s. Chance of rain 30 percent. .WEDNESDAY...Sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50 percent. .WEDNESDAY NIGHT...A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 50 percent. .THURSDAY...Mostly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ MOZ051-052-060-111100- Montgomery MO-Lincoln MO-Warren MO- 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy. Patchy fog after midnight. Lows in the mid 60s. Light and variable winds. .FRIDAY...Cloudy in the morning, then becoming partly sunny. Patchy fog in the morning. Highs in the lower 80s. Southeast winds around 5 mph. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. South winds around 5 mph. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Humid with highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy in the evening, then mostly clear with a slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Light and variable winds. Chance of rain 20 percent. .SUNDAY...Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the mid 80s. Chance of rain 30 percent. .SUNDAY NIGHT AND MONDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper 80s. .MONDAY NIGHT...Mostly clear. Lows in the upper 60s. .TUESDAY...Sunny. A chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent. .TUESDAY NIGHT...Partly cloudy with a slight chance of thunderstorms. A chance of showers. Lows in the mid 60s. Chance of rain 50 percent. .WEDNESDAY...Partly sunny with a 50 percent chance of showers. Highs in the mid 80s. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Chance of rain 50 percent. .THURSDAY...Partly sunny with a slight chance of thunderstorms. A chance of showers. Highs in the upper 70s. Chance of rain 50 percent. $$ ILZ058-059-098-099-111100- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy. Patchy fog after midnight. Lows in the mid 60s. Northeast winds around 5 mph. .FRIDAY...Mostly cloudy. Patchy fog in the morning. A slight chance of showers in the afternoon. Highs in the lower 80s. Southeast winds around 5 mph. Chance of rain 20 percent. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 60s. South winds around 5 mph. .SATURDAY...Mostly sunny. Highs in the upper 80s. Southwest winds around 5 mph. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 60s. South winds around 5 mph. .SUNDAY...Mostly 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. .SUNDAY NIGHT AND MONDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper 80s. .MONDAY NIGHT...Mostly clear. Lows in the upper 60s. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs around 90. Chance of rain 20 percent. .TUESDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Chance of rain 50 percent. .WEDNESDAY...Partly sunny with a 50 percent chance of showers. Highs in the mid 80s. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers. A slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 50 percent. .THURSDAY...Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs around 80. Chance of rain 50 percent. $$ ILZ060-064-065-111100- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy. Patchy fog after midnight. Lows in the mid 60s. North winds around 5 mph this evening, becoming light and variable. .FRIDAY...Mostly cloudy. Patchy fog in the morning. A slight chance of showers in the afternoon. Highs in the lower 80s. Southeast winds around 5 mph. Chance of rain 20 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 60s. Southeast winds around 5 mph in the evening, becoming light and variable. .SATURDAY...Mostly sunny. Highs in the upper 80s. Southwest winds around 5 mph. .SATURDAY NIGHT...Mostly clear. Lows in the mid 60s. West winds around 5 mph in the evening, becoming light and variable. .SUNDAY AND SUNDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms. Highs in the upper 80s. Lows in the lower 60s. Chance of rain 20 percent. .MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the upper 80s. Lows in the upper 60s. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs around 90. Chance of rain 20 percent. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. A slight chance of thunderstorms in the evening. A chance of showers. Lows in the mid 60s. Chance of rain 50 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Partly cloudy. A 50 percent chance of showers. Highs in the mid 80s. Lows in the mid 60s. .THURSDAY...Mostly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Chance of rain 50 percent. $$ ILZ079-MOZ075-111100- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy with a 20 percent chance of showers. Patchy fog after midnight. Lows in the upper 60s. North winds around 5 mph this evening, becoming light and variable. .FRIDAY...Patchy fog in the morning. Cloudy with a chance of showers. A slight chance of thunderstorms in the afternoon. Humid with highs in the lower 80s. East winds around 5 mph, becoming south in the afternoon. Chance of rain 40 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers in the evening, then partly cloudy after midnight. Lows in the upper 60s. South winds around 5 mph. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Humid with highs around 90. Southwest winds around 5 mph. Heat index values up to 101 in the afternoon. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. South winds around 5 mph in the evening, becoming light and variable. .SUNDAY...Mostly sunny. A slight chance of showers in the morning. Highs around 90. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 60s. .MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the upper 80s. Lows in the upper 60s. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly clear with a chance of showers. Lows in the upper 60s. Chance of rain 30 percent. .WEDNESDAY...Mostly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 40 percent. .WEDNESDAY NIGHT...Partly cloudy with a 40 percent chance of showers. Lows in the mid 60s. .THURSDAY...Mostly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. $$ MOZ059-062-072-073-111100- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy. A slight chance of showers after midnight. Patchy fog after midnight. Lows in the mid 60s. North winds around 5 mph this evening, becoming light and variable. Chance of rain 20 percent. .FRIDAY...Mostly cloudy. Patchy fog in the morning. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the lower 80s. Southeast winds around 5 mph. Chance of rain 40 percent. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 60s. South winds around 5 mph. .SATURDAY...Mostly sunny. Humid with highs in the upper 80s. Southwest winds around 5 mph. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. Light and variable winds. .SUNDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 60s. .MONDAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows in the upper 60s. .TUESDAY...Sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100 in the afternoon. .TUESDAY NIGHT THROUGH WEDNESDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Highs in the upper 80s. Chance of rain 50 percent. .THURSDAY...Mostly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Chance of rain 50 percent. $$ ILZ102-MOZ065-111100- Monroe IL-Jefferson MO- 1002 PM CDT Thu Sep 10 2026 .TONIGHT...Mostly cloudy. A slight chance of showers after midnight. Patchy fog after midnight. Lows in the upper 60s. North winds around 5 mph this evening, becoming light and variable. Chance of rain 20 percent. .FRIDAY...Mostly cloudy. Patchy fog in the morning. A slight chance of showers in the morning, then a chance of showers in the afternoon. Humid with highs in the lower 80s. Southeast winds around 5 mph. Chance of rain 40 percent. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 60s. South winds around 5 mph. .SATURDAY...Mostly sunny. Humid with highs around 90. Southwest winds around 5 mph. Heat index values up to 101 in the afternoon. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 60s. Northwest winds around 5 mph in the evening, becoming light and variable. .SUNDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs around 90. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 60s. .MONDAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows in the upper 60s. .TUESDAY...Sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100 in the afternoon. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 40 percent. .WEDNESDAY...Mostly sunny with a 50 percent chance of showers. Highs in the upper 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Highs in the lower 80s. Chance of rain 50 percent. $$