Starved Rock State Park Weather Forecast

    • 61
    • 75

    Rain Showers

    • 54
    • 73

    Chance Rain Showers

    • 50
    • 82

    Rain Showers

    • 36
    • 63

    Chance Rain Showers

    • 35
    • 53

    Mostly Sunny

    • 48
    • 64

    Mostly Sunny

Today 15 Apr La Salle

A chance of Thunderstorms until late afternoon. Then Showers and Thunderstorms likely late in the afternoon. Highs in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 80 percent.

Tonight 15 Apr La Salle

Thunderstorms likely in the evening. Showers. A chance of Thunderstorms after midnight. Lows in the lower 60s. South Winds 10 to 15 Mph. Gusts up to 25 Mph in the evening. Chance of precipitation 80 percent.

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Starved Rock State Park Temperature Statistics

April Temperature

Illinois Valley Regional Airport (7.5 miles)

  • Lowest 7 April, 2026

    30.2 °F

  • Average April

    52.3 °F

  • Highest 12 April, 2026

    80.6 °F

Climate (2021–Present)

Illinois Valley Regional Airport (7.5 miles)

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  • Average Low 2021–2026

    43.2 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    62.5 °F
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