Starved Rock State Park Weather Forecast

    • 60
    • 80

    Mostly Cloudy

    • 61
    • 80

    Mostly Sunny

    • 65
    • 80

    Chance Thunderstorms

    • 60
    • 79

    Slight Chance Thunderstorms

    • 60
    • 76

    Partly Sunny

    • 63
    • 77

    Partly Sunny

Today 19 Aug La Salle

Mostly cloudy. Patchy fog early in the morning. A slight chance of Showers and Thunderstorms in the afternoon. Highs around 80. North Winds around 5 Mph. Chance of precipitation 20 percent.

Tonight 19 Aug La Salle

Mostly cloudy in the Evening, then becoming partly cloudy. Lows around 60. Northeast Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Starved Rock State Park Temperature Statistics

August Temperature

Illinois Valley Regional Airport (7.5 miles)

  • Lowest 3 August, 2026

    60.8 °F

  • Average August

    74.5 °F

  • Highest 10 August, 2026

    89.6 °F

Climate (2021–2026)

Illinois Valley Regional Airport (7.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    43.3 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    62.6 °F
Get WillyWeather+ to remove ads