| National Weather Service Forecast for:
St. Louis, MO Issued by: National Weather Service St. Louis/St. Charles, MO |
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| Updated: Sun, 16-Aug-2026 1:25pm CDT | ||||||||||||||||||||||||||||||||||||||||
| Saint Louis | ||||||||||||||||||||||||||||||||||||||||
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| This Afternoon |
Mostly sunny, with a high near 95. Heat index values as high as 109. West wind around 6 mph. |
| Tonight |
Showers and thunderstorms likely. Mostly cloudy, with a low around 73. Heat index values as high as 109. North wind around 6 mph. Chance of precipitation is 70%. |
| Monday |
Mostly sunny, with a high near 86. North wind around 7 mph. |
| Monday Night |
Partly cloudy, with a low around 68. North wind 0 to 6 mph. |
| Tuesday |
Sunny, with a high near 90. Southwest wind around 2 mph. |
| Tuesday Night |
A chance of rain showers after 1am. Partly cloudy, with a low around 73. Chance of precipitation is 40%. |
| Wednesday |
A chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 88. Chance of precipitation is 50%. |
| Wednesday Night |
A chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 60%. |
| Thursday |
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 60%. |
| Thursday Night |
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 20%. |
| Friday |
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 20%. |
| Friday Night |
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 67. Chance of precipitation is 20%. |
| Saturday |
Sunny, with a high near 87. |
| Saturday Night |
Mostly clear, with a low around 67. |
Forecast from NOAA-NWS for St. Louis, MO.