National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 39.12°N 89.81°W (Text-Only)
NWS Forecast for: Gillespie IL
Issued by: National Weather Service Saint Louis, MO
Last Update: 8:52 pm CDT Jul 14, 2025		Print

  • Overnight

    Overnight: Mostly cloudy, with a low around 69. Southeast wind 3 to 5 mph.

    Low: 69 °F

    Mostly Cloudy



  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after noon. Patchy fog before 8am. Otherwise, partly sunny, with a high near 85. South wind 3 to 6 mph.

    High: 85 °F

    Chance
    T-storms and
    Patchy Fog

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 71. South wind around 5 mph becoming calm after midnight.

    Low: 71 °F

    Partly Cloudy



  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Southwest wind 3 to 7 mph.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday
    Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73. South wind around 6 mph.

    Low: 73 °F

    Chance
    T-storms


  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 89.

    High: 89 °F

    Chance
    T-storms


  • Thursday
    Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms


  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms


  • Friday
    Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms


    • Overnight: Mostly cloudy, with a low around 69. Southeast wind 3 to 5 mph.

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after noon. Patchy fog before 8am. Otherwise, partly sunny, with a high near 85. South wind 3 to 6 mph.

    Tuesday Night: Partly cloudy, with a low around 71. South wind around 5 mph becoming calm after midnight.

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Southwest wind 3 to 7 mph.

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73. South wind around 6 mph.

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 89.

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 70.

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85.

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Saturday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 91.

    Saturday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

    Sunday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

    Sunday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Monday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.


    Gillespie IL
     39.12°N 89.81°W (Elev. 653 ft)

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