Starved Rock State Park Weather Forecast

    • 69
    • 80

    Chance Rain Showers

    • 68
    • 83

    Mostly Cloudy

    • 68
    • 84

    Chance Thunderstorms

    • 71
    • 85

    Chance Thunderstorms

    • 70
    • 86

    Rain Showers Likely

    • 66
    • 82

    Chance Rain Showers

Today 6 Aug La Salle

Mostly cloudy. Isolated Showers. Near steady temperature in the upper 70s. South Winds around 5 Mph. Chance of precipitation 20 percent.

Tonight 6 Aug La Salle

Mostly cloudy. Isolated Showers. Patchy fog in the late evening and overnight. Humid with Lows in the upper 60s. South Winds around 5 Mph. Chance of precipitation 20 percent.

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  • Temperature Real-Time

Starved Rock State Park Temperature Statistics

August Temperature

Illinois Valley Regional Airport (7.5 miles)

  • Lowest 3 August, 2026

    60.8 °F

  • Average August

    71.3 °F

  • Highest 4 August, 2026

    84.2 °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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