Weather Tomorrow

Weather Tomorrow for ZIP 63108

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

Heat AdvisoryUntil Sep 15, 7:30 AM

Heat Advisory issued September 14 at 11:30AM CDT until September 15 at 7:00PM 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.

Tuesday, September 15, 2026

98°Low 74°FColdHot
Clear

Precip chance

45%

Wind

3-8 mph

Humidity

64%

Feels like

96–76°F

Rain forecast

Rain likely starts around 9 PM and may continue until 9 PM. Peak chance: 45% around 9 PM.

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

Tomorrow by Hour

74°Temperature trend98°
TimeTempConditionRain %Wind
5 AM76°FMostly Clear
0%
8 mph S
6 AM76°FMostly Clear
0%
8 mph S
7 AM75°FClear
0%
8 mph S
8 AM74°FMostly Clear
0%
7 mph S
9 AM74°FMostly Clear
0%
7 mph S
10 AM75°FMostly Clear
0%
7 mph S
11 AM74°FSunny
0%
7 mph S
12 PM74°FSunny
0%
7 mph S
1 PM77°FSunny
0%
7 mph S
2 PM82°FSunny
0%
8 mph S
3 PM88°FSunny
0%
8 mph S
4 PM91°FSunny
3%
8 mph SW
5 PM95°FSunny
6%
8 mph SW
6 PM97°FMostly Sunny
10%
8 mph SW
7 PM98°FIsolated Showers And Thunderstorms
22%
7 mph SW
8 PM98°FScattered Showers And Thunderstorms
33%
6 mph W
9 PM97°FScattered Showers And Thunderstorms
45%
6 mph S
10 PM96°FScattered Showers And Thunderstorms
39%
6 mph S
11 PM93°FScattered Showers And Thunderstorms
33%
5 mph SE
12 AM89°FScattered Showers And Thunderstorms
35%
5 mph SE
1 AM87°FScattered Showers And Thunderstorms
36%
5 mph SE
2 AM82°FScattered Showers And Thunderstorms
38%
3 mph S
3 AM81°FScattered Showers And Thunderstorms
37%
3 mph S
4 AM79°FScattered Showers And Thunderstorms
34%
3 mph S

Precipitation Timeline

100%
50%
45%
5a11a5p11p
<20%20-50%50-70%>70%

What to Wear Tomorrow

Extreme heat — stay cool and protected

Clothing

  • Lightest possible clothing
  • Wide-brim hat
  • UV-protective shirt if outdoors

Footwear

Breathable sandals

Accessories

  • Sunglasses
  • Sunscreen

Conditions

High: 98°F

Low: 74°F

Wind: 3-8 mph

Rain: 45%

Enjoy your day!

Best Time to Be Outside Tomorrow

11 AM – 12 PM96

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

5a11a5p11p