| National Weather Service Forecast for:
Saint Peters MO Issued by: National Weather Service Saint Louis, MO |
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| Updated: 4:10 am CDT Jun 22, 2026 | ||||||||||||||||||
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| Today |
Mostly cloudy, with a high near 74. North wind 8 to 10 mph. |
| Tonight |
Mostly cloudy, then gradually becoming mostly clear, with a low around 61. North wind around 6 mph becoming calm in the evening. |
| Tuesday |
Sunny, with a high near 81. Light east wind. |
| Tuesday Night |
A 20 percent chance of showers after 1am. Increasing clouds, with a low around 64. Light southeast wind. |
| Wednesday |
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. Light and variable wind becoming south around 5 mph in the morning. Chance of precipitation is 60%. |
| Wednesday Night |
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. |
| Thursday |
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. |
| Thursday Night |
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65. |
| Friday |
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. |
| Friday Night |
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 60%. |
| Saturday |
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. |
| Saturday Night |
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. |
| Sunday |
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. |
Forecast from NOAA-NWS for Saint Peters MO.
