Weather Tomorrow

Weather Tomorrow for ZIP 63102

St. Louis, MO · View full St. Louis forecast

Heat AdvisoryUntil Sep 16, 8:00 AM

Heat Advisory issued September 15 at 11:53AM CDT until September 18 at 8:00PM CDT by NWS St Louis MO

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668.

Wednesday, September 16, 2026

94°Low 75°FColdHot
Thunderstorms

Precip chance

34%

Wind

1-5 mph

Humidity

71%

Feels like

92–77°F

Rain forecast

Low chance of precipitation. Highest risk around 10 AM (34%).

Data source: National Weather Service (NOAA) · Updated just now

Tomorrow by Hour

75°Temperature trend94°
TimeTempConditionRain %Wind
5 AM81°FScattered Showers And Thunderstorms
27%
3 mph S
6 AM80°FScattered Showers And Thunderstorms
25%
3 mph S
7 AM79°FScattered Showers And Thunderstorms
27%
2 mph SW
8 AM78°FScattered Showers And Thunderstorms
29%
2 mph SE
9 AM77°FScattered Showers And Thunderstorms
32%
2 mph NE
10 AM76°FScattered Showers And Thunderstorms
34%
2 mph E
11 AM76°FScattered Showers And Thunderstorms
33%
1 mph N
12 PM75°FScattered Showers And Thunderstorms
31%
2 mph NE
1 PM78°FScattered Showers And Thunderstorms
27%
2 mph NE
2 PM81°FIsolated Showers And Thunderstorms
24%
2 mph NE
3 PM84°FIsolated Showers And Thunderstorms
20%
3 mph NE
4 PM87°FIsolated Showers And Thunderstorms
19%
3 mph SE
5 PM90°FIsolated Showers And Thunderstorms
19%
5 mph S
6 PM92°FIsolated Showers And Thunderstorms
18%
5 mph S
7 PM93°FIsolated Showers And Thunderstorms
18%
5 mph S
8 PM94°FIsolated Showers And Thunderstorms
17%
5 mph SW
9 PM94°FIsolated Showers And Thunderstorms
17%
3 mph SE
10 PM93°FIsolated Showers And Thunderstorms
18%
3 mph SE
11 PM93°FIsolated Showers And Thunderstorms
18%
3 mph S
12 AM91°FIsolated Showers And Thunderstorms
16%
3 mph SE
1 AM88°FPartly Cloudy
12%
3 mph SW
2 AM86°FMostly Clear
8%
2 mph S
3 AM84°FPartly Cloudy
4%
3 mph S
4 AM83°FPartly Cloudy
3%
3 mph S

Precipitation Timeline

100%
50%
34%
5a11a5p11p
<20%20-50%50-70%>70%

What to Wear Tomorrow

Hot — wear breathable, light clothing

Clothing

  • Light t-shirt or tank top
  • Shorts or light skirt
  • Hat for sun protection

Footwear

Sandals or breathable sneakers

Accessories

  • Sunglasses
  • Sunscreen

Conditions

High: 94°F

Low: 75°F

Wind: 1-5 mph

Rain: 34%

Enjoy your day!

Best Time to Be Outside Tomorrow

11 AM – 12 PM85

Excellent conditions for outdoor activities (comfortable temp, light wind, daylight)

5a11a5p11p