Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
565 FPUS53 KLSX 220225 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 924 PM CDT Sat Jun 21 2025 ILZ100-101-MOZ061-063-064-221000- 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 924 PM CDT Sat Jun 21 2025 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .SUNDAY...Sunny, hot with highs in the upper 90s. Southwest winds 10 to 15 mph. Heat index values up to 105. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 103 early in the evening. .MONDAY...Sunny, hot with highs in the upper 90s. South winds 5 to 10 mph. Heat index values up to 106. .MONDAY NIGHT...Partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 102 early in the evening. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 70s. Heat index values up to 100 early in the evening. .WEDNESDAY...Sunny. Highs in the mid 90s. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s. .THURSDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 100. .THURSDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent. .FRIDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then 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. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 100. $$ MOZ042-049-050-221000- Audrain MO-Osage MO-Callaway MO- Including the cities of Mexico and Fulton 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .SUNDAY...Sunny. Highs in the mid 90s. Southwest winds 10 to 15 mph with gusts up to 30 mph. .SUNDAY NIGHT...Clear. Lows in the lower 70s. South winds 10 to 15 mph with gusts up to 25 mph. .MONDAY...Sunny. Highs in the mid 90s. Southwest winds 10 to 15 mph. Heat index values up to 102. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. South winds 5 to 10 mph. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 100. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 70s. .WEDNESDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. .WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 70s. .THURSDAY...Sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. .THURSDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 30 percent. .FRIDAY...Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 40 percent. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .SATURDAY...Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 40 percent. $$ MOZ041-047-048-221000- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 25 mph. .SUNDAY...Sunny. Highs in the mid 90s. South winds 10 to 15 mph with gusts up to 30 mph. Heat index values up to 100. .SUNDAY NIGHT...Clear. Lows in the lower 70s. South winds 10 to 15 mph with gusts up to 25 mph. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 102. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. South winds 5 to 10 mph. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 100. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 70s. .WEDNESDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. .WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 70s. .THURSDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. .THURSDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 30 percent. .FRIDAY...Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 40 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .SATURDAY...Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 40 percent. $$ ILZ095>097-MOZ018-019-026-027-034>036-221000- Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO- Including the cities of Quincy, Mount Sterling, Pittsfield, Hannibal, and Bowling Green 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Mostly clear. Lows in the mid 70s. South winds 10 to 15 mph with gusts up to 25 mph. .SUNDAY...Sunny. Highs in the mid 90s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Heat index values up to 101. .SUNDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds 10 to 15 mph with gusts up to 30 mph. .MONDAY...Sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 102. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. South winds 5 to 10 mph. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 70s. .WEDNESDAY AND WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100. .THURSDAY THROUGH FRIDAY...Partly cloudy with a chance of showers and thunderstorms. Highs around 90. Lows in the lower 70s. Chance of rain 40 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms in the evening, then partly cloudy with a chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 40 percent. .SATURDAY...Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 40 percent. $$ ILZ069-070-074-221000- Clinton IL-Marion IL-Washington IL- Including the cities of Centralia and Salem 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .SUNDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 104. .SUNDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 103 early in the evening. .MONDAY...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 104. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 101 early in the evening. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 70s. Heat index values up to 100 early in the evening. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs in the lower 90s. Lows in the mid 70s. Heat index values up to 100. .THURSDAY...Sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. .THURSDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent. .FRIDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 40 percent. $$ MOZ074-084-085-099-221000- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the lower 70s. South winds 5 to 10 mph with gusts up to 20 mph. .SUNDAY...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 102. .SUNDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds 5 to 10 mph. Heat index values up to 101 early in the evening. .MONDAY...Sunny. Highs in the mid 90s. South winds around 5 mph. Heat index values up to 102. .MONDAY NIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .TUESDAY...Sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 70s. Heat index values up to 100 early in the evening. .WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs in the lower 90s. Lows in the lower 70s. Heat index values up to 100. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 70s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. $$ MOZ051-052-060-221000- Montgomery MO-Lincoln MO-Warren MO- 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .SUNDAY...Sunny. Highs in the mid 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 10 to 15 mph with gusts up to 25 mph. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 104. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 70s. .WEDNESDAY...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. .WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 70s. .THURSDAY...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. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. Highs around 90. Chance of rain 30 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .SATURDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. Chance of rain 40 percent. $$ ILZ058-059-098-221000- Greene IL-Macoupin IL-Calhoun IL- 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .SUNDAY...Sunny. Highs in the mid 90s. Southwest winds 10 to 15 mph. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 100 early in the evening. .MONDAY...Sunny. Highs in the mid 90s. Southwest winds 5 to 10 mph. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 70s. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. .WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 70s. .THURSDAY...Sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. .THURSDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 30 percent. .FRIDAY THROUGH SATURDAY...Partly cloudy with a chance of showers and thunderstorms. Highs around 90. Lows in the lower 70s. Chance of rain 40 percent. $$ ILZ099-221000- Jersey IL- 924 PM CDT Sat Jun 21 2025 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .SUNDAY...Sunny, hot with highs in the mid 90s. Southwest winds 10 to 15 mph. Heat index values up to 102. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 101 early in the evening. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 102. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 100. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 70s. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. .WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 70s. .THURSDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. .THURSDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .FRIDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs around 90. Chance of rain 30 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs around 90. Chance of rain 40 percent. $$ ILZ060-064-065-221000- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .SUNDAY...Sunny. Highs in the mid 90s. Southwest winds 10 to 15 mph. Heat index values up to 102. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 101 early in the evening. .MONDAY...Sunny. Highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 101. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 70s. Heat index values up to 100 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s. .THURSDAY...Sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. .THURSDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .FRIDAY THROUGH SATURDAY...Partly cloudy with a chance of showers and thunderstorms. Highs in the upper 80s. Lows in the lower 70s. Chance of rain 40 percent. $$ ILZ079-MOZ075-221000- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph. .SUNDAY...Sunny, hot with highs in the upper 90s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 106. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 104 early in the evening. .MONDAY...Sunny, hot with highs in the upper 90s. South winds around 5 mph. Heat index values up to 105. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 70s. Heat index values up to 100 early in the evening. .WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Hot. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 100. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 30 percent. Heat index values up to 100. $$ MOZ059-062-072-073-221000- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 924 PM CDT Sat Jun 21 2025 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .SUNDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 25 mph. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 104. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 100 early in the evening. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 70s. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs in the lower 90s. Lows in the lower 70s. Heat index values up to 100. .THURSDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. .THURSDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .FRIDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. $$ ILZ102-MOZ065-221000- Monroe IL-Jefferson MO- 924 PM CDT Sat Jun 21 2025 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT TUESDAY... .REST OF TONIGHT...Clear. Lows in the mid 70s. South winds 5 to 10 mph. .SUNDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 105. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 103 early in the evening. .MONDAY...Sunny, hot with highs in the upper 90s. South winds around 5 mph. Heat index values up to 105. .MONDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 70s. Heat index values up to 100 early in the evening. .WEDNESDAY...Sunny. Highs in the mid 90s. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s. Heat index values up to 100 early in the evening. .THURSDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 30 percent. Heat index values up to 100. $$