7-Day Forecast 39.59°N 88.61°W (Text-Only)
NWS Forecast for: Sullivan IL
Issued by: National Weather Service Lincoln, IL
Last Update: 12:41 pm CDT Jul 15, 2025
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  • This
    Afternoon

    This Afternoon: Scattered showers and thunderstorms.  Mostly cloudy, with a high near 85. South wind around 7 mph.  Chance of precipitation is 40%.

    High: 85 °F

    Scattered
    T-storms


  • Tonight

    Tonight: Scattered showers and thunderstorms before 1am, then isolated showers and thunderstorms after 3am.  Partly cloudy, with a low around 71. South southeast wind 3 to 5 mph.  Chance of precipitation is 40%.

    Low: 71 °F

    Scattered
    T-storms


  • Wednesday

    Wednesday: Isolated showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 89. Southwest wind 5 to 9 mph.  Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms


  • Wednesday
    Night

    Wednesday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 72. South southwest wind 5 to 8 mph.  Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms


  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 1pm.  Partly sunny, with a high near 84. West southwest wind around 7 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Partly Sunny
    then Showers
    Likely

  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am.  Mostly cloudy, with a low around 66. North northwest wind around 5 mph becoming light and variable.  Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers after 1pm.  Partly sunny, with a high near 82. Northeast wind 3 to 5 mph.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy



  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    T-storms




  • This Afternoon: Scattered showers and thunderstorms. Mostly cloudy, with a high near 85. South wind around 7 mph. Chance of precipitation is 40%.

    Tonight: Scattered showers and thunderstorms before 1am, then isolated showers and thunderstorms after 3am. Partly cloudy, with a low around 71. South southeast wind 3 to 5 mph. Chance of precipitation is 40%.

    Wednesday: Isolated showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Southwest wind 5 to 9 mph. Chance of precipitation is 20%.

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 72. South southwest wind 5 to 8 mph. Chance of precipitation is 30%.

    Thursday: Showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. West southwest wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 66. North northwest wind around 5 mph becoming light and variable. Chance of precipitation is 40%.

    Friday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 82. Northeast wind 3 to 5 mph.

    Friday Night: Mostly cloudy, with a low around 68.

    Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.

    Saturday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.

    Sunday: A chance of showers and thunderstorms. Partly sunny, with a high near 87.

    Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 69.

    Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 88.



    Sullivan IL
     39.59°N 88.61°W (Elev. 669 ft)

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