Expires:202607280000;;701448
FPUS53 KLSX 271654
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
1154 AM CDT Mon Jul 27 2026


ILZ100-101-MOZ061-063-064-280000-
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
1154 AM CDT Mon Jul 27 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING...

.THIS AFTERNOON...Sunny, hot with highs in the upper 90s.
Southwest winds 10 to 15 mph with gusts up to 25 mph. Heat index
values up to 112. 
.TONIGHT...Partly cloudy with isolated showers and thunderstorms.
Humid with lows in the upper 70s. West winds around 5 mph. Chance
of rain 20 percent. Heat index values up to 112 early in the
evening. 
.TUESDAY...Mostly sunny with isolated showers and thunderstorms.
Humid with highs around 90. North winds 5 to 10 mph. Chance of
rain 20 percent. Heat index values up to 104. 
.TUESDAY NIGHT...Mostly cloudy in the evening, then becoming
partly cloudy. Isolated showers and thunderstorms. Cooler with
lows in the upper 60s. Northeast winds 5 to 10 mph. Chance of
rain 20 percent. 
.WEDNESDAY...Sunny. Highs in the upper 80s. Northeast winds 5 to
10 mph. 
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows in the upper
60s. Highs in the upper 80s. 
.THURSDAY NIGHT...Partly cloudy in the evening, then mostly
cloudy with a slight chance of showers and thunderstorms after
midnight. Lows around 70. Chance of rain 20 percent. 
.FRIDAY AND FRIDAY NIGHT...Mostly cloudy. A chance of showers and
thunderstorms. Highs in the mid 80s. Lows in the upper 60s.
Chance of rain 50 percent. 
.SATURDAY...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. 
.SATURDAY NIGHT...Mostly clear. A slight chance of showers and
thunderstorms in the evening. Lows in the upper 60s. Chance of
rain 20 percent. 
.SUNDAY...Sunny. Highs in the mid 80s. 

$$