7-Day Forecast 38.59°N 89.92°W (Text-Only)
NWS Forecast for: O'Fallon IL
Issued by: National Weather Service Saint Louis, MO
Last Update: 3:38 am CDT May 4, 2024
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  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 5pm.  Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 83. Light and variable wind becoming southwest 5 to 8 mph in the morning.

    High: 83 °F

    Patchy Fog
    then Chance
    T-storms


  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 10pm.  Mostly cloudy, with a low around 57. West wind 6 to 9 mph becoming northwest after midnight.  Chance of precipitation is 60%.

    Low: 57 °F

    T-storms
    Likely then
    Mostly Cloudy


  • Sunday

    Sunday: Partly sunny, with a high near 74. North wind 5 to 8 mph.

    High: 74 °F

    Partly Sunny




  • Sunday
    Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Mostly cloudy, with a low around 62. Northeast wind 5 to 7 mph becoming southeast after midnight.  Chance of precipitation is 60%.

    Low: 62 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers likely and possibly a thunderstorm.  Partly sunny, with a high near 78. Southeast wind 8 to 10 mph becoming south in the afternoon.  Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely



  • Monday
    Night

    Monday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Partly cloudy, with a low around 66. Breezy.  Chance of precipitation is 60%.

    Low: 66 °F

    Slight Chance
    T-storms then
    Showers
    Likely and
    Breezy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm.  Mostly sunny, with a high near 83. Breezy.  Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely and
    Breezy


  • Tuesday
    Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    T-storms



  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Mostly sunny, with a high near 84. Chance of precipitation is 70%.

    High: 84 °F

    Chance
    T-storms then
    Showers
    Likely



  • Today: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 83. Light and variable wind becoming southwest 5 to 8 mph in the morning.

    Tonight: Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 57. West wind 6 to 9 mph becoming northwest after midnight. Chance of precipitation is 60%.

    Sunday: Partly sunny, with a high near 74. North wind 5 to 8 mph.

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Northeast wind 5 to 7 mph becoming southeast after midnight. Chance of precipitation is 60%.

    Monday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. Southeast wind 8 to 10 mph becoming south in the afternoon. Chance of precipitation is 70%.

    Monday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 66. Breezy. Chance of precipitation is 60%.

    Tuesday: Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 83. Breezy. Chance of precipitation is 70%.

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 70%.

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. Chance of precipitation is 60%.

    Thursday: A 30 percent chance of showers. Mostly sunny, with a high near 79.

    Thursday Night: A 40 percent chance of showers. Partly cloudy, with a low around 57.

    Friday: Mostly sunny, with a high near 72.



    O'Fallon IL
     38.59°N 89.92°W (Elev. 551 ft)

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