Starved Rock State Park Weather Forecast

    • 16
    • 59

    Rain Showers

    • 11
    • 22

    Blizzard

    • 23
    • 27

    Mostly Cloudy

    • 16
    • 33

    Chance Snow

    • 10
    • 23

    Mostly Sunny

    • 19
    • 27

    Partly Sunny

Today 28 Dec La Salle

Patchy fog in the morning. Showers with a chance of Thunderstorms. Breezy with Highs around 60. South Winds 5 to 10 Mph, increasing to southwest 20 to 25 Mph with Gusts up to 30 Mph in the afternoon. Chance of precipitation near 100 percent.

Tonight 28 Dec La Salle

Mostly cloudy. A chance of rain and snow Showers in the Evening, then a slight chance of snow Showers after midnight. Windy with Lows around 16. West Winds 20 to 30 Mph, increasing to 25 to 35 Mph after midnight. Gusts up to 45 Mph. Chance of precipitation 50 percent.

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Starved Rock State Park Temperature Statistics

December Temperature

Illinois Valley Regional Airport (7.5 miles)

  • Lowest 14 December, 2025

    -3.3 °F

  • Average December

    25.9 °F

  • Highest 18 December, 2025

    52.7 °F

Climate (2020–Present)

Illinois Valley Regional Airport (7.5 miles)

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  • Average Low 2020–2025

    43.1 °F

  • Average 2020–2025

    52.6 °F

  • Average High 2020–2025

    62.1 °F
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