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
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
| Time | Temp | Condition | Rain % | Wind | ||
|---|---|---|---|---|---|---|
| 5 AM☽ | 76°F | Mostly Clear | 0% | 8 mph S | ||
| 6 AM☽ | 76°F | Mostly Clear | 0% | 8 mph S | ||
| 7 AM☽ | 75°F | Clear | 0% | 8 mph S | ||
| 8 AM☽ | 74°F | Mostly Clear | 0% | 7 mph S | ||
| 9 AM☽ | 74°F | Mostly Clear | 0% | 7 mph S | ||
| 10 AM☽ | 75°F | Mostly Clear | 0% | 7 mph S | ||
| 11 AM | 74°F | Sunny | 0% | 7 mph S | ||
| 12 PM | 74°F | Sunny | 0% | 7 mph S | ||
| 1 PM | 77°F | Sunny | 0% | 7 mph S | ||
| 2 PM | 82°F | Sunny | 0% | 8 mph S | ||
| 3 PM | 88°F | Sunny | 0% | 8 mph S | ||
| 4 PM | 91°F | Sunny | 3% | 8 mph SW | ||
| 5 PM | 95°F | Sunny | 6% | 8 mph SW | ||
| 6 PM | 97°F | Mostly Sunny | 10% | 8 mph SW | ||
| 7 PM | 98°F | Isolated Showers And Thunderstorms | 22% | 7 mph SW | ||
| 8 PM | 98°F | Scattered Showers And Thunderstorms | 33% | 6 mph W | ||
| 9 PM | 97°F | Scattered Showers And Thunderstorms | 45% | 6 mph S | ||
| 10 PM | 96°F | Scattered Showers And Thunderstorms | 39% | 6 mph S | ||
| 11 PM☽ | 93°F | Scattered Showers And Thunderstorms | 33% | 5 mph SE | ||
| 12 AM☽ | 89°F | Scattered Showers And Thunderstorms | 35% | 5 mph SE | ||
| 1 AM☽ | 87°F | Scattered Showers And Thunderstorms | 36% | 5 mph SE | ||
| 2 AM☽ | 82°F | Scattered Showers And Thunderstorms | 38% | 3 mph S | ||
| 3 AM☽ | 81°F | Scattered Showers And Thunderstorms | 37% | 3 mph S | ||
| 4 AM☽ | 79°F | Scattered Showers And Thunderstorms | 34% | 3 mph S | ||
Precipitation Timeline
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
Excellent conditions for outdoor activities (dry, comfortable temp, light wind, daylight)