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' https://*.weather.gov 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: Fri, 05 Dec 2025 06:27:41 GMT Date: Fri, 05 Dec 2025 06:12:41 GMT Transfer-Encoding: chunked Connection: keep-alive Connection: Transfer-Encoding National Weather Service
National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 38.81°N 90.71°W (Text-Only)
NWS Forecast for: 2 Miles NNE O'Fallon MO
Issued by: National Weather Service Saint Louis, MO
Last Update: 8:26 pm CST Dec 4, 2025		Print

  • Overnight

    Overnight: Clear, with a low around 9. Light southeast wind.

    Low: 9 °F

    Clear



  • Friday

    Friday: Sunny, with a high near 39. South wind 3 to 7 mph.

    High: 39 °F

    Sunny



  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 26. South wind around 6 mph becoming light and variable after midnight.

    Low: 26 °F

    Mostly Cloudy



  • Saturday

    Saturday: Partly sunny, with a high near 36. Calm wind becoming east around 5 mph in the afternoon.

    High: 36 °F

    Partly Sunny



  • Saturday
    Night

    Saturday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 29. East wind around 6 mph.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 35. Chance of precipitation is 30%.

    High: 35 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy



  • Monday

    Monday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny



  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy



    • Overnight: Clear, with a low around 9. Light southeast wind.

    Friday: Sunny, with a high near 39. South wind 3 to 7 mph.

    Friday Night: Mostly cloudy, with a low around 26. South wind around 6 mph becoming light and variable after midnight.

    Saturday: Partly sunny, with a high near 36. Calm wind becoming east around 5 mph in the afternoon.

    Saturday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 29. East wind around 6 mph.

    Sunday: A chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 35. Chance of precipitation is 30%.

    Sunday Night: Mostly cloudy, with a low around 14.

    Monday: Mostly sunny, with a high near 31.

    Monday Night: Partly cloudy, with a low around 24.

    Tuesday: Mostly sunny, with a high near 44.

    Tuesday Night: Mostly cloudy, with a low around 32.

    Wednesday: A 30 percent chance of rain. Mostly cloudy, with a high near 46.

    Wednesday Night: Mostly cloudy, with a low around 23.

    Thursday: Partly sunny, with a high near 34.


    2 Miles NNE O'Fallon MO
     38.81°N 90.71°W (Elev. 502 ft)

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