Goose Lake Prairie State Park Weather Forecast

    • 71
    • 85

    Slight Chance Thunderstorms

    • 73
    • 91

    Chance Thunderstorms

    • 68
    • 88

    Chance Thunderstorms

    • 65
    • 81

    Partly Sunny

    • 63
    • 83

    Mostly Sunny

    • 63
    • 86

    Mostly Sunny

Today 17 Aug Grundy

Mostly cloudy. A slight chance of Showers late in the morning. Highs in the mid 80s. Northeast Winds around 5 Mph. Chance of precipitation 20 percent.

Tonight 17 Aug Grundy

Partly cloudy early in the Evening, then becoming mostly cloudy. A slight chance of Showers and Thunderstorms after midnight. Lows in the lower 70s. East Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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Goose Lake Prairie State Park Temperature Statistics

August Temperature

Joliet Regional Airport (13.7 miles)

  • Lowest 2 August, 2025

    55.6 °F

  • Average August

    76.2 °F

  • Highest 9 August, 2025

    91.4 °F

Climate (2020–Present)

Joliet Regional Airport (13.7 miles)

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  • Average Low 2020–2025

    43.5 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    63 °F
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