| National Weather Service Forecast for:
St. Louis, MO Issued by: National Weather Service St. Louis/St. Charles, MO |
||||||||||||||||||||||||||||||||||||||||
| Updated: Thu, 13-Aug-2026 5:46pm CDT | ||||||||||||||||||||||||||||||||||||||||
| Saint Louis | ||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||
Extreme Heat Warning issued August 13 at 10:28AM CDT until August 15 at 9:00PM CDT
Extreme Heat Warning issued August 13 at 3:34AM CDT until August 15 at 9:00PM CDT
| This Afternoon |
Sunny. High near 98, with temperatures falling to around 94 in the afternoon. Heat index values as high as 105. South wind around 7 mph. |
| Tonight |
Mostly clear, with a low around 77. Heat index values as high as 103. South wind around 6 mph. |
| Friday |
A slight chance of showers and thunderstorms between 7am and 8am. Mostly sunny, with a high near 100. Heat index values as high as 114. South wind around 7 mph. Chance of precipitation is 20%. |
| Friday Night |
Mostly clear, with a low around 78. Heat index values as high as 113. Southeast wind around 7 mph. |
| Saturday |
Sunny, with a high near 100. Southwest wind around 7 mph. |
| Saturday Night |
Mostly clear, with a low around 78. |
| Sunday |
Mostly sunny, with a high near 99. |
| Sunday Night |
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 74. Chance of precipitation is 40%. |
| Monday |
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%. |
| Monday Night |
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 71. Chance of precipitation is 30%. |
| Tuesday |
Mostly sunny, with a high near 90. |
| Tuesday Night |
Mostly clear, with a low around 74. |
| Wednesday |
Mostly sunny, with a high near 95. |
| Wednesday Night |
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. Chance of precipitation is 20%. |
Forecast from NOAA-NWS for St. Louis, MO.







