Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
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155 FPUS53 KLSX 171048 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 548 AM CDT Thu Sep 17 2026 ILZ100-101-MOZ061-063-064-171800- 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 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny. A slight chance of showers and thunderstorms this afternoon. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 108 this afternoon. .TONIGHT...Mostly clear. Humid with lows in the lower 70s. Southwest winds around 5 mph, becoming north after midnight. Heat index values up to 103 early in the evening. .FRIDAY...Sunny. Patchy fog in the morning. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. East winds around 5 mph, becoming south in the afternoon. Chance of rain 20 percent. Heat index values up to 105 in the afternoon. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .SATURDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the lower 90s. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 60s. Chance of rain 40 percent. .MONDAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of showers. Lows in the lower 60s. .TUESDAY...Mostly sunny. A slight chance of showers in the morning. Highs around 80. Chance of rain 20 percent. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows around 60. Highs in the lower 80s. $$ MOZ049-171800- Osage MO- 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 106 this afternoon. .TONIGHT...Mostly clear. Humid with lows in the lower 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .FRIDAY...Sunny, hot with highs in the mid 90s. South winds around 5 mph. Heat index values up to 104 in the afternoon. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .SATURDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT...Mostly clear in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the lower 70s. Chance of rain 20 percent. .SUNDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs around 90. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of thunderstorms. A chance of showers. Lows in the upper 60s. Chance of rain 50 percent. .MONDAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 60 percent. .MONDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of thunderstorms in the evening. A chance of showers. Lows in the lower 60s. Chance of rain 50 percent. .TUESDAY...Mostly sunny with a 20 percent chance of showers. Highs in the upper 70s. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 50s. .WEDNESDAY...Mostly sunny. A slight chance of showers in the afternoon. Highs around 80. Chance of rain 20 percent. $$ MOZ042-171800- Audrain MO- Including the city of Mexico 548 AM CDT Thu Sep 17 2026 .TODAY...Sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph. Heat index values up to 101. .TONIGHT...Mostly clear. Humid with lows in the upper 60s. Northwest winds around 5 mph, becoming northeast after midnight. .FRIDAY...Mostly sunny. Highs in the lower 90s. Southeast winds around 5 mph, becoming south in the afternoon. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. South winds around 5 mph. .SATURDAY...Mostly sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph. .SATURDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 60s. Chance of rain 50 percent. .SUNDAY...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. .SUNDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 70 percent. .MONDAY...A slight chance of thunderstorms. Showers likely, mainly in the morning. Highs in the mid 70s. Chance of rain 70 percent. .MONDAY NIGHT...Mostly cloudy with a 40 percent chance of showers. Lows in the upper 50s. .TUESDAY...Partly sunny. A slight chance of showers in the morning. Highs in the lower 70s. Chance of rain 20 percent. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 50s. .WEDNESDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 70s. Chance of rain 20 percent. $$ MOZ050-171800- Callaway MO- Including the city of Fulton 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT FRIDAY... .TODAY...Sunny. Highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 104. .TONIGHT...Mostly clear. Humid with lows around 70. South winds around 5 mph, becoming east around 5 mph after midnight. Heat index values up to 100 early in the evening. .FRIDAY...Sunny with highs in the lower 90s. Southeast winds around 5 mph, becoming southwest in the afternoon. Heat index values up to 103 in the afternoon. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .SATURDAY...Mostly sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 20 percent. .SUNDAY...Partly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent. .SUNDAY NIGHT AND MONDAY...Showers likely with a slight chance of thunderstorms. Lows in the mid 60s. Highs in the upper 70s. Chance of rain 70 percent. .MONDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A 50 percent chance of showers. Lows around 60. .TUESDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 70s. Chance of rain 20 percent. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows in the upper 50s. Highs in the upper 70s. $$ MOZ047-048-171800- Moniteau MO-Cole MO- Including the city of Jefferson City 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph, becoming west this afternoon. Heat index values up to 107 this afternoon. .TONIGHT...Mostly clear. Humid with lows in the lower 70s. South winds around 5 mph. Heat index values up to 103 early in the evening. .FRIDAY...Sunny, hot with highs in the mid 90s. South winds around 5 mph. Heat index values up to 104 in the afternoon. .FRIDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .SATURDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers. Lows in the lower 70s. .SUNDAY...Mostly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs around 90. Chance of rain 30 percent. .SUNDAY NIGHT AND MONDAY...Showers likely with a slight chance of thunderstorms. Lows in the upper 60s. Highs around 80. Chance of rain 70 percent. .MONDAY NIGHT...Mostly cloudy with a chance of showers in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 50 percent. .TUESDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 70s. Chance of rain 20 percent. .TUESDAY NIGHT...Partly cloudy. Lows around 60. .WEDNESDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 20 percent. $$ MOZ041-171800- Boone MO- Including the city of Columbia 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT FRIDAY... .TODAY...Sunny. Highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph, becoming west this afternoon. Heat index values up to 104. .TONIGHT...Mostly clear. Humid with lows in the lower 70s. East winds around 5 mph. Heat index values up to 102 early in the evening. .FRIDAY...Sunny with highs in the mid 90s. Southeast winds around 5 mph, becoming southwest in the afternoon. Heat index values up to 103 in the afternoon. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. Heat index values up to 100 early in the evening. .SATURDAY...Mostly sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows around 70. Chance of rain 50 percent. .SUNDAY...Partly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent. .SUNDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 70 percent. .MONDAY...A slight chance of thunderstorms. Showers likely, mainly in the morning. Cooler with highs in the mid 70s. Chance of rain 70 percent. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of showers. Lows around 60. .TUESDAY...Partly sunny. Highs in the mid 70s. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 50s. .WEDNESDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 70s. Chance of rain 20 percent. $$ ILZ095>097-MOZ018-019-026-027-034>036-171800- 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 548 AM CDT Thu Sep 17 2026 .TODAY...Sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph, becoming west this afternoon. Heat index values up to 103. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Patchy fog after midnight. Humid with lows around 70. Northeast winds around 5 mph. Heat index values up to 100 early in the evening. .FRIDAY...Patchy fog in the morning. Mostly sunny with a slight chance of showers and thunderstorms. Humid with highs in the upper 80s. East winds 5 to 10 mph, becoming south in the afternoon. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. .FRIDAY NIGHT...Partly cloudy. Lows in the lower 70s. South winds around 5 mph. .SATURDAY...Partly sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. .SATURDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with showers likely with a slight chance of thunderstorms after midnight. Lows in the upper 60s. Chance of rain 60 percent. .SUNDAY...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. Cooler with highs in the lower 80s. Chance of rain 50 percent. .SUNDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 70 percent. .MONDAY...A slight chance of thunderstorms. Showers likely, mainly in the morning. Highs in the lower 70s. Chance of rain 70 percent. .MONDAY NIGHT...Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 50s. Chance of rain 40 percent. .TUESDAY...Partly sunny. A slight chance of showers in the morning. Highs in the lower 70s. Chance of rain 20 percent. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows in the upper 50s. Highs in the mid 70s. $$ ILZ069-070-074-171800- Clinton IL-Marion IL-Washington IL- Including the cities of Centralia and Salem 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .TONIGHT...Mostly clear. Humid with lows in the lower 70s. Southwest winds around 5 mph, becoming northwest after midnight. Heat index values up to 103 early in the evening. .FRIDAY...Sunny. Patchy fog in the morning. A slight chance of showers in the afternoon. Hot with highs in the mid 90s. East winds around 5 mph, becoming southwest in the afternoon. Chance of rain 20 percent. Heat index values up to 103. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. Southeast winds around 5 mph. Heat index values up to 100 early in the evening. .SATURDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT...Partly cloudy. Lows in the lower 70s. .SUNDAY AND SUNDAY NIGHT...Partly cloudy. A 20 percent chance of showers. Highs in the lower 90s. Lows in the upper 60s. .MONDAY...Partly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50 percent. .MONDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 50 percent. .TUESDAY...Mostly sunny with a 20 percent chance of showers. Highs in the lower 80s. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s. .WEDNESDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the lower 80s. Chance of rain 20 percent. $$ MOZ074-084-085-099-171800- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 105. .TONIGHT...Mostly clear. Lows in the lower 70s. Southeast winds around 5 mph, becoming southwest after midnight. Heat index values up to 100 early in the evening. .FRIDAY...Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph. .FRIDAY NIGHT...Mostly clear. Lows around 70. Light and variable winds, becoming south around 5 mph after midnight. .SATURDAY...Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph. .SATURDAY NIGHT...Mostly clear. Lows around 70. .SUNDAY AND SUNDAY NIGHT...Partly cloudy. Highs in the mid 90s. Lows in the upper 60s. .MONDAY...Partly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50 percent. .MONDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 50 percent. .TUESDAY...Mostly sunny with a 20 percent chance of showers. Highs in the lower 80s. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows around 60. Highs in the lower 80s. $$ MOZ060-171800- Warren MO- 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107 this afternoon. .TONIGHT...Mostly clear. Humid with lows around 70. Southwest winds around 5 mph, becoming north after midnight. Heat index values up to 103 early in the evening. .FRIDAY...Sunny with highs in the mid 90s. East winds around 5 mph, becoming south in the afternoon. Heat index values up to 104 in the afternoon. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. Light and variable winds, becoming south around 5 mph after midnight. Heat index values up to 100 early in the evening. .SATURDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds around 5 mph. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows around 70. Highs in the upper 80s. Chance of rain 20 percent. .SUNDAY NIGHT...Mostly cloudy with a slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the mid 60s. Chance of rain 50 percent. .MONDAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of showers. Lows in the lower 60s. .TUESDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 70s. Chance of rain 20 percent. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows in the upper 50s. Highs in the upper 70s. $$ MOZ051-052-171800- Montgomery MO-Lincoln MO- 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT FRIDAY... .TODAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .TONIGHT...Mostly clear. Humid with lows around 70. Southwest winds around 5 mph, becoming north around 5 mph after midnight. Heat index values up to 102 early in the evening. .FRIDAY...Sunny with highs in the lower 90s. East winds around 5 mph, becoming south around 5 mph in the afternoon. Heat index values up to 103 in the afternoon. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .SATURDAY...Mostly sunny. Highs in the mid 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 20 percent. .SUNDAY...Mostly sunny. A chance of showers in the morning, then a slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent. .SUNDAY NIGHT...Mostly cloudy with a slight chance of thunderstorms. A chance of showers. Lows in the mid 60s. Chance of rain 50 percent. .MONDAY...Showers likely in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 60 percent. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of showers. Lows around 60. .TUESDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 70s. Chance of rain 20 percent. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows in the upper 50s. Highs in the upper 70s. $$ ILZ058-059-098-099-171800- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT FRIDAY... .TODAY...Sunny. A slight chance of showers and thunderstorms this afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph, becoming west this afternoon. Chance of rain 20 percent. Heat index values up to 105. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows around 70. West winds around 5 mph, becoming northeast after midnight. Heat index values up to 101 early in the evening. .FRIDAY...Mostly sunny. Patchy fog in the morning. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. East winds around 5 mph, becoming south around 5 mph in the afternoon. Chance of rain 20 percent. Heat index values up to 101. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers in the evening, then mostly clear after midnight. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 20 percent. .SUNDAY...Mostly 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 upper 80s. Chance of rain 30 percent. .SUNDAY 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 mid 60s. Chance of rain 50 percent. .MONDAY...A slight chance of thunderstorms. Showers likely, mainly in the morning. Highs in the lower 80s. Chance of rain 60 percent. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of showers. Lows around 60. .TUESDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 70s. Chance of rain 20 percent. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows in the upper 50s. Highs around 80. $$ ILZ060-065-171800- Montgomery IL-Fayette IL- Including the cities of Litchfield and Vandalia 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT FRIDAY... .TODAY...Sunny. A slight chance of showers and thunderstorms this afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 105. .TONIGHT...Partly cloudy. Lows in the lower 70s. West winds around 5 mph, becoming northeast around 5 mph after midnight. Heat index values up to 101 early in the evening. .FRIDAY...Sunny. Patchy fog in the morning. A chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 90s. East winds around 5 mph, becoming southeast around 5 mph in the afternoon. Chance of rain 40 percent. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows around 70. Southeast winds around 5 mph. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Highs around 90. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 20 percent. .MONDAY...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 mid 80s. Chance of rain 50 percent. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of showers. Lows in the lower 60s. .TUESDAY...Mostly sunny with a 20 percent chance of showers. Highs in the upper 70s. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s. .WEDNESDAY...Mostly sunny. A slight chance of showers in the afternoon. Highs in the lower 80s. Chance of rain 20 percent. $$ ILZ064-171800- Bond IL- 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny. A slight chance of showers and thunderstorms this afternoon. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 106. .TONIGHT...Partly cloudy in the evening, then becoming mostly clear. Humid with lows in the lower 70s. Southwest winds around 5 mph, becoming northeast around 5 mph after midnight. Heat index values up to 102 early in the evening. .FRIDAY...Sunny. Patchy fog in the morning. A slight chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 90s. East winds around 5 mph, becoming south around 5 mph in the afternoon. Chance of rain 20 percent. Heat index values up to 102. .FRIDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 70s. Southeast winds around 5 mph. .SATURDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 60s. Highs in the lower 90s. Chance of rain 20 percent. .MONDAY...Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of showers. Lows in the lower 60s. .TUESDAY...Mostly sunny. A slight chance of showers in the morning. Highs around 80. Chance of rain 20 percent. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows in the upper 50s. Highs in the lower 80s. $$ ILZ079-MOZ075-171800- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 107. .TONIGHT...Mostly clear. Lows in the lower 70s. Southwest winds around 5 mph. Heat index values up to 102 early in the evening. .FRIDAY...Sunny, hot with highs in the mid 90s. West winds around 5 mph. Heat index values up to 105. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. Heat index values up to 100 early in the evening. .SATURDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows around 70. Highs in the mid 90s. .MONDAY...Partly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50 percent. .MONDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 50 percent. .TUESDAY...Mostly sunny. A chance of showers, mainly in the morning. Highs in the lower 80s. Chance of rain 30 percent. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 60s. .WEDNESDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the lower 80s. Chance of rain 20 percent. $$ MOZ059-062-072-073-171800- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. Heat index values up to 102 early in the evening. .FRIDAY...Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 104. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .SATURDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows around 70. .SUNDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy with a slight chance of showers in the evening, then mostly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 60s. Chance of rain 50 percent. .MONDAY...Mostly cloudy with a chance of showers in the morning, then partly sunny with showers likely with a chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 60 percent. .MONDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 50 percent. .TUESDAY...Mostly sunny with a 20 percent chance of showers. Highs in the upper 70s. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows in the upper 50s. Highs around 80. $$ ILZ102-MOZ065-171800- Monroe IL-Jefferson MO- 548 AM CDT Thu Sep 17 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY... .TODAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 109. .TONIGHT...Mostly clear. Humid with lows in the lower 70s. Southwest winds around 5 mph. Heat index values up to 103 early in the evening. .FRIDAY...Sunny. Patchy fog in the morning. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 106. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .SATURDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds around 5 mph. .SATURDAY NIGHT...Partly cloudy. Lows in the lower 70s. .SUNDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. .SUNDAY 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. .MONDAY...Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent. .MONDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 50 percent. .TUESDAY...Mostly sunny with a 20 percent chance of showers. Highs around 80. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Lows around 60. Highs in the lower 80s. $$