Rock Run County Forest Preserve Weather Forecast

    • 37
    • 58

    Sunny

    • 39
    • 65

    Sunny

    • 42
    • 68

    Mostly Sunny

    • 45
    • 72

    Mostly Sunny

    • 49
    • 74

    Mostly Sunny

    • 51
    • 77

    Mostly Sunny

Today 17 Oct Northern Will

Partly cloudy. Highs in the lower 70s.

Tonight 17 Oct Northern Will

Clear. Patchy frost late. Lows in the upper 30s. South Winds 5 to 10 Mph.

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Rock Run County Forest Preserve Temperature Statistics

October Temperature

Joliet Regional Airport (1.2 miles)

  • Lowest 5 October, 2026

    42.1 °F

  • Average October

    64 °F

  • Highest 12 October, 2026

    89.6 °F

Climate (2021–2026)

Joliet Regional Airport (1.2 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    63.3 °F
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