Starved Rock State Park Weather Forecast

    • 55
    • 63

    Chance Rain Showers

    • 52
    • 65

    Mostly Cloudy

    • 53
    • 69

    Partly Sunny

    • 53
    • 68

    Mostly Cloudy

    • 51
    • 70

    Partly Sunny

    • 53
    • 70

    Partly Sunny

Today 21 Sep La Salle

Cloudy. A slight chance of Showers. Near steady temperature in the lower 60s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 20 percent.

Tonight 21 Sep La Salle

Mostly cloudy. A slight chance of Showers in the late evening and overnight. Lows in the mid 50s. Northeast Winds around 10 Mph. Chance of precipitation 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Starved Rock State Park Temperature Statistics

September Temperature

Illinois Valley Regional Airport (7.5 miles)

  • Lowest 14 September, 2026

    50 °F

  • Average September

    74 °F

  • Highest 1 September, 2026

    93.2 °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