Starved Rock State Park Weather Forecast

    • 63
    • 83

    Patchy Smoke

    • 73
    • 85

    Thunderstorms Likely

    • 63
    • 86

    Mostly Sunny

    • 58
    • 77

    Mostly Sunny

    • 61
    • 81

    Slight Chance Thunderstorms

    • 64
    • 82

    Partly Sunny

Today 19 Jul La Salle

Mostly sunny in the Morning, then becoming partly cloudy. Patchy smoke. Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 19 Jul La Salle

Mostly clear in the Evening, then becoming partly cloudy. Patchy smoke in the evening. Lows in the lower 60s. East Winds around 5 Mph.

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Starved Rock State Park Temperature Statistics

July Temperature

Illinois Valley Regional Airport (7.5 miles)

  • Lowest 12 July, 2026

    64.4 °F

  • Average July

    78.9 °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

    62.7 °F
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