Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
447 FPUS53 KLSX 191944 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 243 PM CDT Sun Jul 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 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... .TONIGHT...Partly cloudy. A slight chance of showers and thunderstorms this evening. Patchy smoke after midnight. Lows in the lower 70s. East winds around 5 mph. Chance of rain 20 percent. .MONDAY...Patchy smoke in the morning. Mostly sunny. Humid with highs in the lower 90s. Southeast winds around 5 mph, becoming south in the afternoon. Heat index values up to 105. .MONDAY NIGHT...Mostly clear. Humid with lows in the upper 70s. South winds around 5 mph. Heat index values up to 105 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Hot with highs in the mid 90s. West winds 5 to 10 mph, becoming northwest with gusts up to 20 mph in the afternoon. Chance of rain 20 percent. Heat index values up to 109. .TUESDAY NIGHT...Mostly clear. Lows around 70. North winds 5 to 10 mph. Heat index values up to 102 early in the evening. .WEDNESDAY...Sunny, cooler with highs in the mid 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower 60s. Highs in the lower 80s. .THURSDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 20 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Lows in the upper 60s. Chance of rain 40 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows around 70. .SUNDAY...Mostly sunny. Highs in the lower 90s. Heat index values up to 100. $$ MOZ049-050-200300- Osage MO-Callaway MO- Including the city of Fulton 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... .TONIGHT...Partly cloudy. A slight chance of showers and thunderstorms this evening. Lows in the lower 70s. East winds around 5 mph. Chance of rain 20 percent. .MONDAY...Patchy fog in the morning. Sunny with highs in the mid 90s. South winds around 5 mph, becoming west in the afternoon. Heat index values up to 105. .MONDAY NIGHT...Mostly clear. Humid with lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 105 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. West winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 106. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds 5 to 10 mph. Heat index values up to 101 early in the evening. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs in the mid 80s. Lows in the mid 60s. .THURSDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the lower 80s. Chance of rain 20 percent. .THURSDAY NIGHT...Partly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 40 percent. .FRIDAY...Partly sunny with a chance of thunderstorms. A chance of showers. Highs in the lower 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Chance of rain 40 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the lower 90s. $$ MOZ042-200300- Audrain MO- Including the city of Mexico 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM CDT MONDAY... .TONIGHT...Partly cloudy. Lows around 70. East winds 5 to 10 mph. .MONDAY...Sunny with highs in the lower 90s. South winds around 5 mph, becoming southwest around 5 mph in the afternoon. Heat index values up to 102. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. Southwest winds 5 to 10 mph. Heat index values up to 102 early in the evening. .TUESDAY...Sunny. Highs in the lower 90s. West winds 5 to 10 mph, becoming northwest with gusts up to 20 mph in the afternoon. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds 10 to 15 mph. .WEDNESDAY...Sunny, cooler with highs in the lower 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower 60s. Highs in the lower 80s. .THURSDAY 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 lower 60s. Chance of rain 40 percent. .FRIDAY...Partly sunny with a chance of showers with a slight chance of thunderstorms in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs around 80. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy 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. Chance of rain 40 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the upper 80s. $$ MOZ041-047-048-200300- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... .TONIGHT...Partly cloudy. A slight chance of showers and thunderstorms this evening. Lows in the mid 70s. East winds around 5 mph. Chance of rain 20 percent. Heat index values up to 100 early this evening. .MONDAY...Sunny, hot with highs in the mid 90s. South winds around 5 mph, becoming west in the afternoon. Heat index values up to 106. .MONDAY NIGHT...Mostly clear. Humid with lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 108 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. West winds around 5 mph, becoming northwest with gusts up to 20 mph in the afternoon. Heat index values up to 106. .TUESDAY NIGHT...Mostly clear. Lows around 70. North winds 5 to 10 mph. Heat index values up to 101 early in the evening. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs in the mid 80s. Lows in the mid 60s. .THURSDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Chance of rain 20 percent. .THURSDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 40 percent. .FRIDAY...Partly sunny with a chance of thunderstorms. A chance of showers. Highs in the lower 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of thunderstorms. A chance of showers. Lows in the mid 60s. Chance of rain 40 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows around 70. Highs in the lower 90s. Heat index values up to 100. $$ ILZ095-MOZ018-019-026-027-034>036-200300- Adams IL-Knox MO-Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO- Pike MO- Including the cities of Quincy, Hannibal, and Bowling Green 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM CDT MONDAY... .TONIGHT...Partly cloudy. Patchy smoke after midnight. Lows around 70. East winds around 5 mph. .MONDAY...Patchy smoke in the morning. Sunny with highs in the lower 90s. South winds around 5 mph. Heat index values up to 104. .MONDAY NIGHT...Mostly clear. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 105 early in the evening. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the morning. Highs in the lower 90s. Northwest winds 10 to 15 mph. Chance of rain 20 percent. .TUESDAY NIGHT...Mostly clear. Cooler with lows in the upper 60s. North winds 5 to 10 mph. Gusts up to 25 mph in the evening. .WEDNESDAY...Sunny. Highs in the lower 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower 60s. Highs in the lower 80s. .THURSDAY NIGHT...Mostly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 40 percent. .FRIDAY...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. .FRIDAY NIGHT...Mostly cloudy 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. Chance of rain 30 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs around 90. $$ ILZ096-097-200300- Brown IL-Pike IL- Including the cities of Mount Sterling and Pittsfield 243 PM CDT Sun Jul 19 2026 .TONIGHT...Partly cloudy. Patchy smoke. Lows in the upper 60s. East winds around 5 mph. .MONDAY...Patchy smoke in the morning. Sunny with highs in the lower 90s. South winds around 5 mph. Heat index values up to 104 in the afternoon. .MONDAY NIGHT...Mostly clear in the evening, then partly cloudy with a chance of thunderstorms with a slight chance of showers after midnight. Humid with lows in the mid 70s. Southwest winds around 5 mph. Gusts up to 20 mph after midnight. Chance of rain 40 percent. Heat index values up to 103 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the lower 90s. Northwest winds 5 to 10 mph. Chance of rain 20 percent. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds 5 to 10 mph. .WEDNESDAY...Sunny. Highs in the lower 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower 60s. Highs in the lower 80s. .THURSDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the lower 60s. Chance of rain 20 percent. .FRIDAY...Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the mid 60s. Chance of rain 30 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs around 90. $$ ILZ069-074-200300- Clinton IL-Washington IL- 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... .TONIGHT...Partly cloudy. A slight chance of showers and thunderstorms this evening. Patchy smoke after midnight. Lows around 70. Northeast winds around 5 mph this evening, becoming light and variable. Chance of rain 20 percent. .MONDAY...Patchy fog and smoke in the morning. Mostly sunny. Humid with highs in the lower 90s. Light and variable winds. Heat index values up to 104. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. South winds around 5 mph. Heat index values up to 105 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph, becoming west in the afternoon. Chance of rain 30 percent. Heat index values up to 111. .TUESDAY NIGHT...Mostly clear. Lows around 70. North winds 5 to 10 mph. Heat index values up to 105 early in the evening. .WEDNESDAY...Sunny, cooler with highs in the lower 80s. .WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Partly cloudy. Lows in the lower 60s. Highs in the lower 80s. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Lows in the mid 60s. Chance of rain 30 percent. .SATURDAY...Mostly sunny. A chance of showers in the morning. Highs in the mid 80s. Chance of rain 30 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows in the upper 60s. Highs in the lower 90s. $$ ILZ070-200300- Marion IL- Including the cities of Centralia and Salem 243 PM CDT Sun Jul 19 2026 .TONIGHT...Partly cloudy. Patchy smoke. Lows in the upper 60s. Northeast winds around 5 mph this evening, becoming light and variable. .MONDAY...Patchy smoke in the morning. Mostly sunny. Highs around 90. Light and variable winds. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the mid 70s. Southwest winds around 5 mph. Heat index values up to 100 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 90s. West winds 5 to 10 mph. Chance of rain 40 percent. Heat index values up to 107. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds 5 to 10 mph. Heat index values up to 100 early in the evening. .WEDNESDAY...Sunny, cooler with highs in the lower 80s. .WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Partly cloudy. Lows in the lower 60s. Highs around 80. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Lows in the mid 60s. Chance of rain 30 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the upper 60s. .SUNDAY...Mostly sunny. Highs around 90. $$ MOZ074-084-085-099-200300- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... .TONIGHT...Mostly cloudy with a chance of showers and thunderstorms this evening, then partly cloudy after midnight. Patchy fog after midnight. Lows in the lower 70s. Light and variable winds. Chance of rain 50 percent. .MONDAY...Mostly sunny. Patchy fog in the morning. A chance of showers with a slight chance of thunderstorms in the afternoon. Humid with highs in the lower 90s. Light and variable winds. Chance of rain 40 percent. Heat index values up to 105. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. Light and variable winds, becoming southwest around 5 mph after midnight. Heat index values up to 103 early in the evening. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. West winds around 5 mph. Chance of rain 20 percent. Heat index values up to 109. .TUESDAY NIGHT...Mostly clear. Lows around 70. North winds around 5 mph. Heat index values up to 106 early in the evening. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs in the mid 80s. Lows in the lower 60s. .THURSDAY...Mostly sunny. Highs in the lower 80s. .THURSDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 20 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms. Highs in the lower 80s. Lows in the mid 60s. Chance of rain 40 percent. .SATURDAY...Partly sunny. A chance of showers with a slight chance of thunderstorms in the morning. Highs in the mid 80s. Chance of rain 40 percent. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 60s. .SUNDAY...Mostly sunny. Highs in the lower 90s. $$ MOZ051-060-200300- Montgomery MO-Warren MO- 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... .TONIGHT...Partly cloudy. A slight chance of showers and thunderstorms this evening. Lows around 70. East winds around 5 mph this evening, becoming light and variable. Chance of rain 20 percent. .MONDAY...Patchy fog in the morning. Sunny with highs in the lower 90s. Light and variable winds. Heat index values up to 106. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. Southwest winds around 5 mph. Heat index values up to 106 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. West winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 106. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds 5 to 10 mph. Heat index values up to 100 early in the evening. .WEDNESDAY...Sunny, cooler with highs in the mid 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower 60s. Highs in the lower 80s. .THURSDAY NIGHT...Partly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 30 percent. .FRIDAY...Partly sunny with a chance of showers with a slight chance of thunderstorms in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Chance of rain 40 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 100. $$ MOZ052-200300- Lincoln MO- 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM CDT MONDAY... .TONIGHT...Partly cloudy. Patchy smoke after midnight. Lows around 70. East winds around 5 mph. .MONDAY...Patchy fog and smoke in the morning. Sunny with highs in the lower 90s. Southeast winds around 5 mph in the morning, becoming light and variable. Heat index values up to 105. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. Southwest winds around 5 mph. Heat index values up to 106 early in the evening. .TUESDAY...Sunny with highs in the mid 90s. West winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 105. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds 5 to 10 mph. .WEDNESDAY...Sunny, cooler with highs in the lower 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower 60s. Highs in the lower 80s. .THURSDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the lower 60s. Chance of rain 20 percent. .FRIDAY...Partly sunny in the morning, then becoming mostly cloudy. A slight chance of thunderstorms. A chance of showers. Highs in the lower 80s. Chance of rain 40 percent. .FRIDAY 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 30 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the lower 90s. $$ ILZ058-059-098-099-200300- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 243 PM CDT Sun Jul 19 2026 .TONIGHT...Partly cloudy. Patchy smoke. Lows in the upper 60s. East winds 5 to 10 mph. .MONDAY...Patchy smoke in the morning. Sunny. Highs in the lower 90s. Southeast winds around 5 mph, becoming southwest in the afternoon. Heat index values up to 101. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. South winds around 5 mph. Heat index values up to 102 early in the evening. .TUESDAY...Mostly sunny. Humid with highs in the lower 90s. West winds 10 to 15 mph. Heat index values up to 101. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds 5 to 10 mph. .WEDNESDAY...Sunny, cooler with highs in the lower 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows around 60. Highs in the lower 80s. .THURSDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 20 percent. .FRIDAY...Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the mid 60s. Chance of rain 30 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the upper 60s. .SUNDAY...Mostly sunny. Highs in the lower 90s. $$ ILZ060-064-065-200300- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 243 PM CDT Sun Jul 19 2026 .TONIGHT...Partly cloudy. Patchy smoke. Lows in the upper 60s. East winds around 5 mph. .MONDAY...Patchy smoke in the morning. Mostly sunny. Highs in the upper 80s. Southeast winds around 5 mph, becoming southwest in the afternoon. Heat index values up to 100 in the afternoon. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the mid 70s. South winds around 5 mph. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Humid with highs in the lower 90s. West winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 105. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds 5 to 10 mph. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs around 80. Lows in the upper 50s. .THURSDAY...Mostly sunny. Highs around 80. .THURSDAY NIGHT...Partly cloudy. A slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 20 percent. .FRIDAY...Partly sunny. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs around 80. Chance of rain 30 percent. .FRIDAY NIGHT...Mostly cloudy 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. Chance of rain 30 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the upper 60s. .SUNDAY...Mostly sunny. Highs in the upper 80s. $$ ILZ079-MOZ075-200300- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... .TONIGHT...Mostly cloudy with a chance of showers and thunderstorms this evening, then partly cloudy after midnight. Patchy fog after midnight. Lows in the lower 70s. Northeast winds around 5 mph this evening, becoming light and variable. Chance of rain 50 percent. Heat index values up to 100 early this evening. .MONDAY...Patchy fog in the morning. Mostly sunny. Humid with highs in the lower 90s. Light and variable winds. Heat index values up to 106. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. South winds around 5 mph. Heat index values up to 105 early in the evening. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. West winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 112. .TUESDAY NIGHT...Mostly clear. Lows around 70. North winds 5 to 10 mph. Heat index values up to 108 early in the evening. .WEDNESDAY...Sunny, cooler with highs in the mid 80s. .WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Partly cloudy. Lows in the lower 60s. Highs in the lower 80s. .FRIDAY...Partly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40 percent. .FRIDAY NIGHT...Mostly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the mid 60s. Chance of rain 30 percent. .SATURDAY...Partly sunny. A chance of showers in the morning. Highs in the upper 80s. Chance of rain 30 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 100. $$ MOZ059-062-072-073-200300- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... .TONIGHT...Partly cloudy. A chance of showers and thunderstorms this evening. Patchy fog after midnight. Lows in the lower 70s. East winds around 5 mph this evening, becoming light and variable. Chance of rain 40 percent. .MONDAY...Patchy fog in the morning. Mostly sunny. Humid with highs in the lower 90s. Light and variable winds. Heat index values up to 106. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. Light and variable winds, becoming southwest around 5 mph after midnight. Heat index values up to 105 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. West winds 5 to 10 mph. Heat index values up to 108. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds around 5 mph. Heat index values up to 102 early in the evening. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs in the mid 80s. Lows in the lower 60s. .THURSDAY...Mostly sunny. Highs in the lower 80s. .THURSDAY NIGHT...Partly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 30 percent. .FRIDAY...Partly sunny. A chance of showers with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of thunderstorms. A chance of showers. Lows in the mid 60s. Chance of rain 40 percent. .SATURDAY...Partly sunny. A chance of showers in the morning. Highs in the upper 80s. Chance of rain 40 percent. .SATURDAY NIGHT...Mostly clear. Lows in the upper 60s. .SUNDAY...Mostly sunny. Highs in the lower 90s. Heat index values up to 100 in the afternoon. $$ ILZ102-MOZ065-200300- Monroe IL-Jefferson MO- 243 PM CDT Sun Jul 19 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... .TONIGHT...Mostly cloudy with a chance of showers and thunderstorms this evening, then partly cloudy after midnight. Patchy fog after midnight. Lows in the lower 70s. East winds around 5 mph this evening, becoming light and variable. Chance of rain 40 percent. .MONDAY...Patchy fog in the morning. Mostly sunny. Humid with highs in the lower 90s. Light and variable winds. Heat index values up to 107. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. South winds around 5 mph. Heat index values up to 106 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. West winds 5 to 10 mph. Heat index values up to 111. .TUESDAY NIGHT...Mostly clear. Lows around 70. North winds 5 to 10 mph. Heat index values up to 106 early in the evening. .WEDNESDAY...Sunny. Not as warm with highs in the mid 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower 60s. Highs in the lower 80s. .THURSDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the lower 60s. Chance of rain 20 percent. .FRIDAY...Partly sunny with a chance of showers with a slight chance of thunderstorms in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of thunderstorms. A chance of showers. Lows in the mid 60s. Chance of rain 40 percent. .SATURDAY...Partly sunny. A chance of showers in the morning. Highs in the upper 80s. Chance of rain 40 percent. .SATURDAY NIGHT...Mostly clear. Lows in the upper 60s. .SUNDAY...Mostly sunny. Highs in the lower 90s. Heat index values up to 100. $$