HTTP/1.1 200 OK Server: Apache X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Content-Security-Policy: default-src 'none'; style-src 'self' code.jquery.com *.arcgis.com cdn.jsdelivr.net 'unsafe-inline'; script-src-elem 'self' cdn.gov.cfigroup.com *.digitalgov.gov *.google-analytics.com *.arcgis.com code.jquery.com www.googletagmanager.com s.go-mpulse.net 'unsafe-inline'; img-src 'self' data: *.ncep.noaa.gov *.noaa.gov *.weather.gov *.arcgisonline.com *.arcgis.com maps.google.com; connect-src 'self' *.google-analytics.com *.arcgis.com opengeo.ncep.noaa.gov *.weather.gov; font-src 'self' cdn.jsdelivr.net; script-src 'unsafe-eval' 'unsafe-inline' Referrer-Policy: strict-origin-when-cross-origin Strict-Transport-Security: max-age=31536000; includeSubdomains; preload; Access-Control-Allow-Origin: * Content-Type: text/html; charset=UTF-8 Cache-Control: max-age=900 Expires: Tue, 30 Jun 2026 10:41:36 GMT Date: Tue, 30 Jun 2026 10:26:36 GMT Content-Length: 26988 Connection: keep-alive National Weather Service
National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 38.78°N 90.57°W (Text-Only)
NWS Forecast for: Saint Peters MO
Issued by: National Weather Service Saint Louis, MO
Last Update: 2:21 am CDT Jun 30, 2026		Print

  • Today

    Today: Sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 6 to 8 mph.

    High: 97 °F

    Hot


  • Tonight

    Tonight: Clear, with a low around 77. South wind 5 to 7 mph.

    Low: 77 °F

    Clear


  • Wednesday

    Wednesday: Sunny, with a high near 96. Heat index values as high as 105. Southwest wind 5 to 7 mph.

    High: 96 °F

    Sunny


  • Wednesday
    Night

    Wednesday Night: Clear, with a low around 78. South wind 5 to 7 mph.

    Low: 78 °F

    Clear


  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Southwest wind around 6 mph.

    High: 96 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday
    Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 77.

    Low: 77 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday
    Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.

    Low: 76 °F

    Slight Chance
    T-storms

  • Independence
    Day

    Independence Day: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 95.

    High: 95 °F

    Chance
    T-storms



    • Today: Sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 6 to 8 mph.

    Tonight: Clear, with a low around 77. South wind 5 to 7 mph.

    Wednesday: Sunny, with a high near 96. Heat index values as high as 105. Southwest wind 5 to 7 mph.

    Wednesday Night: Clear, with a low around 78. South wind 5 to 7 mph.

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Southwest wind around 6 mph.

    Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 77.

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95.

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.

    Independence Day: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 95.

    Saturday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.

    Sunday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.

    Sunday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.

    Monday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.


    Saint Peters MO
     38.78°N 90.57°W (Elev. 535 ft)

    Visit your local NWS office at: https://www.weather.gov/lsx/