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
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
| Time | Temp | Condition | Rain % | Wind | ||
|---|---|---|---|---|---|---|
| 5 AM☽ | 81°F | Scattered Showers And Thunderstorms | 27% | 3 mph S | ||
| 6 AM☽ | 80°F | Scattered Showers And Thunderstorms | 25% | 3 mph S | ||
| 7 AM☽ | 79°F | Scattered Showers And Thunderstorms | 27% | 2 mph SW | ||
| 8 AM☽ | 78°F | Scattered Showers And Thunderstorms | 29% | 2 mph SE | ||
| 9 AM☽ | 77°F | Scattered Showers And Thunderstorms | 32% | 2 mph NE | ||
| 10 AM☽ | 76°F | Scattered Showers And Thunderstorms | 34% | 2 mph E | ||
| 11 AM | 76°F | Scattered Showers And Thunderstorms | 33% | 1 mph N | ||
| 12 PM | 75°F | Scattered Showers And Thunderstorms | 31% | 2 mph NE | ||
| 1 PM | 78°F | Scattered Showers And Thunderstorms | 27% | 2 mph NE | ||
| 2 PM | 81°F | Isolated Showers And Thunderstorms | 24% | 2 mph NE | ||
| 3 PM | 84°F | Isolated Showers And Thunderstorms | 20% | 3 mph NE | ||
| 4 PM | 87°F | Isolated Showers And Thunderstorms | 19% | 3 mph SE | ||
| 5 PM | 90°F | Isolated Showers And Thunderstorms | 19% | 5 mph S | ||
| 6 PM | 92°F | Isolated Showers And Thunderstorms | 18% | 5 mph S | ||
| 7 PM | 93°F | Isolated Showers And Thunderstorms | 18% | 5 mph S | ||
| 8 PM | 94°F | Isolated Showers And Thunderstorms | 17% | 5 mph SW | ||
| 9 PM | 94°F | Isolated Showers And Thunderstorms | 17% | 3 mph SE | ||
| 10 PM | 93°F | Isolated Showers And Thunderstorms | 18% | 3 mph SE | ||
| 11 PM☽ | 93°F | Isolated Showers And Thunderstorms | 18% | 3 mph S | ||
| 12 AM☽ | 91°F | Isolated Showers And Thunderstorms | 16% | 3 mph SE | ||
| 1 AM☽ | 88°F | Partly Cloudy | 12% | 3 mph SW | ||
| 2 AM☽ | 86°F | Mostly Clear | 8% | 2 mph S | ||
| 3 AM☽ | 84°F | Partly Cloudy | 4% | 3 mph S | ||
| 4 AM☽ | 83°F | Partly Cloudy | 3% | 3 mph S | ||
Precipitation Timeline
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
Excellent conditions for outdoor activities (comfortable temp, light wind, daylight)