Rock Run County Forest Preserve Weather Forecast

    • 64
    • 85

    Slight Chance Thunderstorms

    • 65
    • 84

    Partly Sunny

    • 66
    • 86

    Mostly Sunny

    • 67
    • 89

    Sunny

    • 70
    • 90

    Mostly Sunny

    • 70
    • 90

    Mostly Sunny

    • 69
    • 89

    Mostly Sunny

Today 10 Jul Northern Will

Partly cloudy early in the Afternoon, then becoming mostly cloudy. A slight chance of Thunderstorms with isolated Showers early in the afternoon. Near steady temperature in the lower 80s. Northeast Winds around 5 Mph. Chance of precipitation 20 percent.

Tonight 10 Jul Northern Will

Mostly cloudy. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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Rock Run County Forest Preserve Temperature Statistics

July Temperature

Joliet Regional Airport (1.2 miles)

  • Lowest 8 July, 2026

    63.9 °F

  • Average July

    78.6 °F

  • Highest 2 July, 2026

    94.6 °F

Climate (2021–2026)

Joliet Regional Airport (1.2 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    53.8 °F

  • Average High 2021–2026

    63.4 °F
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