Starved Rock State Park Weather Forecast

    • 69
    • 85

    Thunderstorms

    • 65
    • 83

    Thunderstorms

    • 63
    • 82

    Partly Sunny

    • 66
    • 85

    Partly Sunny

    • 69
    • 87

    Slight Chance Thunderstorms

    • 68
    • 86

    Chance Thunderstorms

Today 4 Jul La Salle

Mostly cloudy. A slight chance of Showers and Thunderstorms early in the Morning, then a chance of Showers and Thunderstorms late in the morning. Showers and Thunderstorms likely in the afternoon. Highs in the mid 80s. West Winds 5 to 10 Mph. Chance of precipitation 70 percent.

Tonight 4 Jul La Salle

Mostly cloudy. A chance of Showers and Thunderstorms, mainly in the evening. Lows in the upper 60s. Northeast Winds around 5 Mph. Chance of precipitation 50 percent.

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Starved Rock State Park Temperature Statistics

July Temperature

Illinois Valley Regional Airport (7.5 miles)

  • Lowest 2 July, 2026

    75.2 °F

  • Average July

    83.7 °F

  • Highest 2 July, 2026

    93.2 °F

Climate (2021–2026)

Illinois Valley Regional Airport (7.5 miles)

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  • Average Low 2021–2026

    43.3 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    62.6 °F
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