| National Weather Service Forecast for:
Ballwin MO Issued by: National Weather Service Saint Louis, MO |
||||||||||||||||||
| Updated: 1:20 am CDT Aug 20, 2026 | ||||||||||||||||||
|
| Overnight |
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 70. Calm wind. |
| Thursday |
Patchy fog before 8am. Otherwise, partly sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon. |
| Thursday Night |
Patchy fog after 4am. Otherwise, mostly clear, with a low around 67. Light northeast wind. |
| Friday |
Patchy fog before 9am. Otherwise, sunny, with a high near 88. Calm wind. |
| Friday Night |
Mostly clear, with a low around 68. Calm wind. |
| Saturday |
Mostly sunny, with a high near 86. |
| Saturday Night |
Mostly clear, with a low around 66. |
| Sunday |
Mostly sunny, with a high near 84. |
| Sunday Night |
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 20%. |
| Monday |
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 84. |
| Monday Night |
Partly cloudy, with a low around 68. |
| Tuesday |
A 20 percent chance of showers. Mostly sunny, with a high near 88. |
| Tuesday Night |
Partly cloudy, with a low around 69. |
| Wednesday |
Mostly sunny, with a high near 89. |
Forecast from NOAA-NWS for Ballwin MO.
