| National Weather Service Forecast for:
St. Louis, MO Issued by: National Weather Service St. Louis/St. Charles, MO |
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| Updated: Mon, 29-Jun-2026 2:41am CDT | ||||||||||||||||||||||||||||||||||||||||
| Saint Louis | ||||||||||||||||||||||||||||||||||||||||
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Extreme Heat Warning issued June 29 at 1:23AM CDT until July 3 at 10:00PM CDT
| Today |
Mostly sunny, with a high near 98. Heat index values as high as 110. South wind 5 to 12 mph. |
| Tonight |
Mostly clear, with a low around 78. Heat index values as high as 110. South wind 3 to 10 mph. |
| Tuesday |
Sunny, with a high near 99. Heat index values as high as 110. Southwest wind 3 to 8 mph. |
| Tuesday Night |
Clear, with a low around 77. Heat index values as high as 109. South wind 3 to 8 mph. |
| Wednesday |
Sunny, with a high near 98. South wind 3 to 7 mph. |
| Wednesday Night |
Mostly clear, with a low around 79. |
| Thursday |
Sunny, with a high near 98. |
| Thursday Night |
Mostly clear, with a low around 79. |
| Friday |
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 97. Chance of precipitation is 20%. |
| Friday Night |
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 78. Chance of precipitation is 20%. |
| Independence Day |
Sunny, with a high near 96. |
| Saturday Night |
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. Chance of precipitation is 20%. |
| Sunday |
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 20%. |
| Sunday Night |
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 75. Chance of precipitation is 30%. |
Forecast from NOAA-NWS for St. Louis, MO.