998
FPUS53 KLSX 201408
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
908 AM CDT Mon Jul 20 2026

ILZ100-101-MOZ061-063-064-202200-
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
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY...

.REST OF TODAY...Patchy smoke late this morning. Sunny. Highs in
the lower 90s. Southeast winds around 5 mph, becoming south this
afternoon. Heat index values up to 106 this afternoon.
.TONIGHT...Mostly clear in the evening, then becoming partly
cloudy. Humid with lows in the upper 70s. South winds around
5 mph. Heat index values up to 106 early in the evening.
.TUESDAY...Mostly sunny. A chance of showers with a slight chance
of thunderstorms in the morning. Humid with highs in the mid 90s.
West winds 10 to 15 mph. Chance of rain 40 percent. Heat index
values up to 106.
.TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds
10 to 15 mph, diminishing to around 5 mph after midnight.
.WEDNESDAY...Sunny, cooler with highs in the mid 80s. North winds
5 to 10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower
60s. Highs in the lower 80s.
.THURSDAY NIGHT...Mostly cloudy. A slight chance of showers after
midnight. Lows in the mid 60s. Chance of rain 20 percent.
.FRIDAY...Partly sunny. A chance of showers in the morning, then
a slight chance of showers and thunderstorms in the afternoon.
Highs around 80. Chance of rain 30 percent.
.FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and
thunderstorms in the evening, then partly cloudy with 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 around 70. Highs
in the lower 90s. Heat index values up to 100.

$$

MOZ049-050-202200-
Osage MO-Callaway MO-
Including the city of Fulton
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY...

.REST OF TODAY...Mostly sunny. Highs in the mid 90s. South winds
around 5 mph, becoming southwest this afternoon. Heat index
values up to 107.
.TONIGHT...Mostly clear. Humid with lows in the upper 70s.
Southwest winds around 5 mph. Heat index values up to 107 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 around 5 mph, becoming northwest 10 to 15 mph in the
afternoon. Chance of rain 20 percent. Heat index values up to
104.
.TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds
5 to 10 mph.
.WEDNESDAY...Sunny, cooler with highs in the mid 80s. Northeast
winds 5 to 10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid
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 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 upper 70s. Chance of
rain 50 percent.
.FRIDAY 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 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.

$$

MOZ042-202200-
Audrain MO-
Including the city of Mexico
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.REST OF TODAY...Sunny. Highs in the lower 90s. South winds
around 5 mph. Heat index values up to 105.
.TONIGHT...Mostly clear. A slight chance of showers and
thunderstorms after midnight. Humid with lows in the mid 70s.
Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat
index values up to 104 early in the evening.
.TUESDAY...Mostly sunny. A chance of showers with a slight chance
of thunderstorms in the morning. Highs in the lower 90s.
Northwest winds 10 to 15 mph. Chance of rain 30 percent.
.TUESDAY NIGHT...Mostly clear. Cooler with lows in the mid 60s.
North winds 10 to 15 mph.
.WEDNESDAY...Sunny, cooler with highs in the lower 80s. Northeast
winds 5 to 10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower
60s. Highs around 80.
.THURSDAY NIGHT AND FRIDAY...Mostly cloudy. A chance of showers
with a slight chance of thunderstorms. Lows in the lower 60s.
Highs in the upper 70s. Chance of rain 40 percent.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. A 20 percent chance
of showers. Lows in the mid 60s. Highs in the mid 80s.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s.
Highs around 90.

$$

MOZ041-047-048-202200-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY...

.REST OF TODAY...Sunny, hot with highs in the mid 90s. Southwest
winds around 5 mph. Heat index values up to 109.
.TONIGHT...Mostly clear. Humid with lows in the upper 70s.
Southwest winds around 5 mph. Heat index values up to 109 early
in the evening.
.TUESDAY...Mostly sunny. Hot with highs in the mid 90s. West
winds around 5 mph, becoming northwest 10 to 15 mph in the
afternoon. Heat index values up to 104.
.TUESDAY NIGHT...Mostly clear. Cooler with lows in the upper 60s.
North winds 5 to 10 mph.
.WEDNESDAY...Sunny. Not as warm with highs in the mid 80s.
Northeast winds 5 to 10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid
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. A chance of showers with a slight chance
of thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon. Highs around 80. Chance of rain
50 percent.
.FRIDAY NIGHT...Mostly cloudy with a slight chance of showers in
the evening, then partly cloudy with a chance of showers after
midnight. 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 AND SUNDAY...Mostly clear. Lows around 70. Highs
in the lower 90s. Heat index values up to 100.

$$

ILZ095-097-MOZ018-019-026-027-034>036-202200-
Adams IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO-Monroe MO-
Ralls MO-Pike MO-
Including the cities of Quincy, Pittsfield, Hannibal,
and Bowling Green
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.REST OF TODAY...Patchy smoke late this morning. Sunny. Highs in
the lower 90s. South winds around 5 mph. Heat index values up to
107 this afternoon.
.TONIGHT...Mostly clear in the evening, then partly cloudy with a
chance of showers with a slight chance of thunderstorms after
midnight. Humid with lows in the mid 70s. Southwest winds 5 to
10 mph. Chance of rain 50 percent. Heat index values up to
106 early in the evening.
.TUESDAY...Partly sunny with a chance of showers with a slight
chance of thunderstorms in the morning, then sunny in the
afternoon. Highs in the lower 90s. Northwest winds 10 to 15 mph
with gusts up to 25 mph. Chance of rain 50 percent.
.TUESDAY NIGHT...Clear, cooler with lows in the mid 60s. North
winds 10 to 15 mph with gusts up to 25 mph, diminishing to around
5 mph after midnight.
.WEDNESDAY...Sunny. Highs in the lower 80s. Northeast winds 5 to
10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower
60s. Highs in the lower 80s.
.THURSDAY NIGHT AND FRIDAY...Mostly cloudy. A chance of showers
with a slight chance of thunderstorms. Lows in the lower 60s.
Highs in the upper 70s. Chance of rain 40 percent.
.FRIDAY NIGHT...Partly cloudy with a 20 percent chance of
showers. Lows in the mid 60s.
.SATURDAY...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 lower 90s.

$$

ILZ096-202200-
Brown IL-
Including the city of Mount Sterling
908 AM CDT Mon Jul 20 2026

.REST OF TODAY...Patchy smoke late this morning. Sunny. Highs
around 90. South winds around 5 mph. Heat index values up to
102 this afternoon.
.TONIGHT...Partly cloudy in the evening, then mostly cloudy with
a chance of showers and thunderstorms after midnight. Humid with
lows in the mid 70s. Southwest winds 5 to 10 mph. Chance of rain
50 percent. Heat index values up to 102 early in the evening.
.TUESDAY...Partly sunny with a chance of showers and
thunderstorms in the morning, then sunny in the afternoon. Highs
in the upper 80s. Northwest winds 10 to 15 mph. Chance of rain
50 percent.
.TUESDAY NIGHT...Clear. Lows in the mid 60s. North winds 10 to
15 mph.
.WEDNESDAY...Sunny. Highs in the lower 80s. North winds 5 to
10 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows around 60.
.THURSDAY...Mostly sunny. Highs around 80.
.THURSDAY NIGHT...Mostly cloudy. A slight chance of showers after
midnight. Lows in the lower 60s. Chance of rain 20 percent.
.FRIDAY...Partly sunny. A chance of showers, mainly in the
morning. Highs in the upper 70s. Chance of rain 30 percent.
.FRIDAY NIGHT...Partly cloudy in the evening, then clearing. A
20 percent chance of showers. Lows in the lower 60s.
.SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs in the mid
80s. Lows in the upper 60s.
.SUNDAY...Sunny. Highs in the lower 90s.

$$

ILZ069-074-202200-
Clinton IL-Washington IL-
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY...

.REST OF TODAY...Sunny. Patchy smoke. Highs in the lower 90s.
Light and variable winds. Heat index values up to 104 this
afternoon.
.TONIGHT...Mostly clear in the evening, then becoming partly
cloudy. Humid with lows in the mid 70s. South winds around 5 mph.
Heat index values up to 103 early in the evening.
.TUESDAY...Mostly sunny. A chance of showers and thunderstorms,
mainly in the morning. Humid with highs in the mid 90s. West
winds around 5 mph, becoming northwest 10 to 15 mph in the
afternoon. 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.
.WEDNESDAY...Sunny, cooler with highs in the lower 80s. North
winds 5 to 10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower
60s. Highs in the lower 80s.
.THURSDAY NIGHT...Mostly cloudy. Lows in the lower 60s.
.FRIDAY...Partly sunny with a 20 percent chance of showers. Highs
around 80.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. A 20 percent chance
of showers. Lows in the mid 60s. Highs in the mid 80s.
.SATURDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the upper 60s.
.SUNDAY...Mostly sunny. Highs in the lower 90s.

$$

ILZ070-202200-
Marion IL-
Including the cities of Centralia and Salem
908 AM CDT Mon Jul 20 2026

.REST OF TODAY...Mostly sunny. Patchy smoke. Highs around 90.
Light and variable winds.
.TONIGHT...Mostly clear in the evening, then becoming partly
cloudy. Humid with lows in the mid 70s. Southwest winds around
5 mph.
.TUESDAY...Partly sunny. A chance of showers and thunderstorms,
mainly in the morning. Humid with highs in the lower 90s. West
winds 10 to 15 mph. Chance of rain 40 percent. Heat index values
up to 104.
.TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds
5 to 10 mph.
.WEDNESDAY...Sunny, cooler with highs in the lower 80s. North
winds 5 to 10 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the lower 60s.
.THURSDAY...Sunny. Highs around 80.
.THURSDAY NIGHT...Partly cloudy in the evening, then becoming
mostly cloudy. Lows in the lower 60s.
.FRIDAY...Partly sunny with a 20 percent chance of showers. Highs
in the upper 70s.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. A 20 percent chance
of showers. Lows in the mid 60s. Highs in the mid 80s.
.SATURDAY NIGHT...Mostly clear. Lows in the upper 60s.
.SUNDAY...Mostly sunny. Highs around 90.

$$

MOZ074-084-085-099-202200-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY...

.REST OF TODAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the lower 90s. Light and variable winds.
Chance of rain 20 percent. Heat index values up to 106 this
afternoon.
.TONIGHT...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...Mostly 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 109.
.TUESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the upper 60s. North winds around 5 mph. Heat index
values up to 101 early in the evening.
.WEDNESDAY...Sunny. Not as warm with highs in the mid 80s. North
winds 5 to 10 mph.
.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 chance of
thunderstorms in the afternoon. Highs in the lower 80s. Chance of
rain 40 percent.
.FRIDAY NIGHT...Mostly cloudy. A slight chance of showers and
thunderstorms 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...Mostly clear. Lows in the upper 60s.
.SUNDAY...Mostly sunny. Highs in the lower 90s. Heat index values
up to 100 in the afternoon.

$$

MOZ051-060-202200-
Montgomery MO-Warren MO-
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY...

.REST OF TODAY...Sunny. Highs in the lower 90s. South winds
around 5 mph late this morning, becoming light and variable. Heat
index values up to 107 this afternoon.
.TONIGHT...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...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Hot with highs in the mid 90s.
Northwest winds 5 to 10 mph. Chance of rain 20 percent. Heat
index values up to 102.
.TUESDAY NIGHT...Mostly clear. Lows in the mid 60s. North winds
5 to 10 mph.
.WEDNESDAY...Sunny, cooler with highs in the lower 80s. North
winds around 5 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower
60s. Highs in the lower 80s.
.THURSDAY NIGHT...Mostly cloudy. A chance of showers after
midnight. Lows in the lower 60s. Chance of rain 30 percent.
.FRIDAY...Partly sunny with a slight chance of thunderstorms. A
chance of showers. Highs in the upper 70s. Chance of rain
40 percent.
.FRIDAY NIGHT...Mostly cloudy with a slight chance of showers in
the evening, then partly cloudy with 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. Heat index values up to 100.

$$

MOZ052-202200-
Lincoln MO-
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.REST OF TODAY...Patchy smoke late this morning. Sunny. Highs in
the lower 90s. Light and variable winds. Heat index values up to
106 this afternoon.
.TONIGHT...Mostly clear in the evening, then partly cloudy with a
chance of showers with a slight chance of thunderstorms after
midnight. Humid with lows in the mid 70s. Southwest winds around
5 mph. Chance of rain 30 percent. Heat index values up to
106 early in the evening.
.TUESDAY...Mostly sunny. A chance of showers with a slight chance
of thunderstorms in the morning. Highs in the mid 90s. Northwest
winds 5 to 10 mph. Chance of rain 40 percent. Heat index values
up to 102.
.TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds
5 to 10 mph.
.WEDNESDAY...Sunny, cooler with highs in the lower 80s. North
winds 5 to 10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower
60s. Highs in the lower 80s.
.THURSDAY NIGHT...Mostly cloudy. A slight chance of showers after
midnight. Lows in the lower 60s. Chance of rain 20 percent.
.FRIDAY...Partly sunny. A chance of showers 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 40 percent.
.FRIDAY NIGHT...Partly cloudy. 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. Heat index values up to 100.

$$

ILZ098-202200-
Calhoun IL-
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.REST OF TODAY...Patchy smoke late this morning. Sunny. Highs in
the lower 90s. South winds around 5 mph late this morning,
becoming light and variable. Heat index values up to 105 this
afternoon.
.TONIGHT...Mostly clear in the evening, then partly cloudy with a
chance of showers with a slight chance of thunderstorms after
midnight. Humid with lows in the mid 70s. Southwest winds around
5 mph. Chance of rain 40 percent. Heat index values up to
105 early in the evening.
.TUESDAY...Mostly sunny. A chance of showers with a slight chance
of thunderstorms in the morning. Highs in the lower 90s.
Northwest winds 5 to 10 mph. Chance of rain 40 percent. Heat
index values up to 102.
.TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds
5 to 10 mph.
.WEDNESDAY...Sunny, cooler with highs in the lower 80s. North
winds 5 to 10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the lower
60s. Highs in the lower 80s.
.THURSDAY NIGHT...Mostly cloudy. A slight chance of showers after
midnight. Lows in the lower 60s. Chance of rain 20 percent.
.FRIDAY...Partly sunny. A chance of showers, mainly in the
morning. Highs in the upper 70s. Chance of rain 30 percent.
.FRIDAY NIGHT...Partly cloudy. 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. Heat index values up to 100.

$$

ILZ058-059-099-202200-
Greene IL-Macoupin IL-Jersey IL-
908 AM CDT Mon Jul 20 2026

.REST OF TODAY...Sunny. Patchy smoke. Highs in the lower 90s.
South winds around 5 mph. Heat index values up to 103 this
afternoon.
.TONIGHT...Mostly clear in the evening, then partly cloudy with a
chance of showers with a slight chance of thunderstorms after
midnight. Humid with lows in the mid 70s. Southwest winds around
5 mph. Chance of rain 50 percent. Heat index values up to
103 early in the evening.
.TUESDAY...Mostly sunny. A chance of showers and thunderstorms in
the morning. Highs in the lower 90s. Northwest winds 10 to
15 mph. Chance of rain 50 percent. Heat index values up to 100.
.TUESDAY NIGHT...Mostly clear. Cooler with lows in the mid 60s.
North winds 10 to 15 mph.
.WEDNESDAY...Sunny, cooler with highs in the lower 80s. North
winds 5 to 10 mph.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the upper
50s. Highs in the lower 80s.
.THURSDAY NIGHT...Mostly cloudy. A slight chance of showers after
midnight. Lows in the lower 60s. Chance of rain 20 percent.
.FRIDAY...Partly sunny. A chance of showers, mainly in the
morning. Highs in the upper 70s. Chance of rain 30 percent.
.FRIDAY NIGHT...Partly cloudy with a 20 percent chance of
showers. Lows in the lower 60s.
.SATURDAY...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 mid 60s.
Highs in the lower 90s.

$$

ILZ060-064-065-202200-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
908 AM CDT Mon Jul 20 2026

.REST OF TODAY...Mostly sunny. Patchy smoke. Highs around 90.
Light and variable winds, becoming southwest around 5 mph this
afternoon.
.TONIGHT...Partly cloudy. A chance of showers and thunderstorms
after midnight. Humid with lows in the mid 70s. Southwest winds
around 5 mph. Chance of rain 40 percent. Heat index values up to
100 early in the evening.
.TUESDAY...Mostly sunny. A chance of showers and thunderstorms in
the morning. Humid with highs in the lower 90s. West winds 10 to
15 mph. Chance of rain 40 percent. Heat index values up to 102.
.TUESDAY NIGHT...Mostly clear. Lows in the mid 60s. North winds
5 to 10 mph.
.WEDNESDAY...Sunny, cooler with highs around 80. North winds 5 to
10 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the upper 50s.
.THURSDAY...Mostly sunny. Highs in the upper 70s.
.THURSDAY NIGHT...Mostly cloudy. Lows in the lower 60s.
.FRIDAY...Partly sunny with a 20 percent chance of showers. Highs
in the upper 70s.
.FRIDAY NIGHT...Partly cloudy with a 20 percent chance of
showers. Lows in the lower 60s.
.SATURDAY...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 mid 60s.
Highs in the upper 80s.

$$

ILZ079-MOZ075-202200-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY...

.REST OF TODAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the lower 90s. Light and variable winds.
Chance of rain 20 percent. Heat index values up to 105 this
afternoon.
.TONIGHT...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 with a slight chance of showers and
thunderstorms. Hot with highs in the mid 90s. West winds 5 to
10 mph, becoming northwest in the afternoon. Chance of rain
20 percent. Heat index values up to 108.
.TUESDAY NIGHT...Partly cloudy in the evening, then becoming
clear. Lows in the upper 60s. North winds 5 to 10 mph. Heat index
values up to 101 early in the evening.
.WEDNESDAY...Sunny, cooler with highs in the mid 80s. North winds
5 to 10 mph.
.WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...Partly cloudy. Lows in
the lower 60s. Highs in the lower 80s.
.FRIDAY...Partly sunny. A chance of showers in the morning, then
a slight chance of showers and thunderstorms 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 in the evening. A
slight chance of showers. Lows in the mid 60s. Chance of rain
20 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 lower 90s. Heat index values
up to 100.

$$

MOZ059-062-072-073-202200-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY...

.REST OF TODAY...Mostly sunny. A slight chance of showers and
thunderstorms this afternoon. Highs in the lower 90s. Light and
variable winds. Chance of rain 20 percent. Heat index values up
to 107 this afternoon.
.TONIGHT...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...Mostly sunny. Hot with highs in the mid 90s. West
winds 5 to 10 mph. Heat index values up to 106.
.TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. North winds
5 to 10 mph.
.WEDNESDAY...Sunny, cooler with highs in the mid 80s. North winds
around 5 mph.
.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 after
midnight. Lows in the lower 60s. Chance of rain 20 percent.
.FRIDAY...Partly sunny. A chance of showers in the morning, then
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 showers and
thunderstorms in the evening, then partly cloudy with 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 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.

$$

ILZ102-MOZ065-202200-
Monroe IL-Jefferson MO-
908 AM CDT Mon Jul 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY...

.REST OF TODAY...Mostly sunny. A slight chance of showers and
thunderstorms this afternoon. Highs in the lower 90s. Light and
variable winds. Chance of rain 20 percent. Heat index values up
to 107 this afternoon.
.TONIGHT...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...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. Chance of rain 20 percent. Heat index values
up to 108.
.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...Sunny, cooler with highs in the mid 80s. North winds
5 to 10 mph.
.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 after midnight. Lows in
the lower 60s. Chance of rain 20 percent.
.FRIDAY...Partly sunny. A chance of showers in the morning, then
a slight 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 showers and
thunderstorms in the evening, then partly cloudy with 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. Heat index values
up to 100.

$$