Starved Rock State Park Weather Forecast

    • 60
    • 85

    Mostly Sunny

    • 62
    • 85

    Partly Sunny

    • 61
    • 86

    Partly Sunny

    • 54
    • 84

    Partly Sunny

    • 56
    • 81

    Mostly Cloudy

    • 55
    • 78

    Partly Sunny

    • 55
    • 78

    Partly Sunny

Today 25 May La Salle

Sunny. Highs in the mid 80s. South Winds 5 to 10 Mph.

Tonight 25 May La Salle

Mostly clear. Lows around 60. South Winds 5 to 10 Mph.

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Starved Rock State Park Temperature Statistics

May Temperature

Illinois Valley Regional Airport (7.5 miles)

  • Lowest 2 May, 2026

    33.8 °F

  • Average May

    60.5 °F

  • Highest 17 May, 2026

    87.8 °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

    52.9 °F

  • Average High 2021–2026

    62.6 °F
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