Starved Rock State Park Weather Forecast

    • 64
    • 85

    Mostly Sunny

    • 69
    • 85

    Chance Thunderstorms

    • 69
    • 85

    Rain Showers Likely

    • 66
    • 82

    Chance Rain Showers

    • 66
    • 84

    Slight Chance Thunderstorms

    • 67
    • 87

    Mostly Sunny

Today 7 Jul La Salle

Mostly sunny. Highs in the mid 80s. North Winds around 5 Mph.

Tonight 7 Jul La Salle

Mostly clear. Lows in the mid 60s. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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Starved Rock State Park Temperature Statistics

July Temperature

Illinois Valley Regional Airport (7.5 miles)

  • Lowest 4 July, 2026

    69.8 °F

  • Average July

    78.6 °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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