| National Weather Service Forecast for:
St. Louis, MO Issued by: National Weather Service St. Louis/St. Charles, MO |
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| Updated: Mon, 10-Aug-2026 2:46pm CDT | ||||||||||||||||||||||||||||||||||||||||
| Saint Louis | ||||||||||||||||||||||||||||||||||||||||
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Extreme Heat Warning issued August 10 at 2:43PM CDT until August 12 at 8:00PM CDT
| This Afternoon |
Mostly cloudy, with a high near 94. Heat index values as high as 102. Southwest wind around 7 mph. |
| Tonight |
Partly cloudy, with a low around 80. Heat index values as high as 101. South wind around 6 mph. |
| Tuesday |
Sunny, with a high near 98. Heat index values as high as 110. Southwest wind around 8 mph. |
| Tuesday Night |
Partly cloudy, with a low around 79. Heat index values as high as 109. Southwest wind around 7 mph. |
| Wednesday |
A slight chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 94. Southwest wind around 7 mph. Chance of precipitation is 20%. |
| Wednesday Night |
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 78. Chance of precipitation is 20%. |
| Thursday |
A slight chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 96. Chance of precipitation is 20%. |
| Thursday Night |
A chance of showers and thunderstorms. Partly cloudy, with a low around 76. Chance of precipitation is 30%. |
| Friday |
A chance of rain showers before 7am. Mostly sunny, with a high near 94. Chance of precipitation is 30%. |
| Friday Night |
Partly cloudy, with a low around 76. |
| Saturday |
Sunny, with a high near 98. |
| Saturday Night |
Mostly clear, with a low around 77. |
| Sunday |
Mostly sunny, with a high near 96. |
| Sunday Night |
A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 74. Chance of precipitation is 20%. |
Forecast from NOAA-NWS for St. Louis, MO.