Rock Run County Forest Preserve Weather Forecast

    • 63
    • 81

    Severe Tstms

    • 59
    • 79

    Slight Chance Thunderstorms

    • 56
    • 76

    Mostly Sunny

    • 59
    • 77

    Partly Sunny

    • 64
    • 78

    Slight Chance Thunderstorms

    • 63
    • 81

    Slight Chance Thunderstorms

    • 63
    • 81

    Slight Chance Thunderstorms

Today 21 Aug Northern Will

Mostly cloudy. A chance of Showers and Thunderstorms. Some Thunderstorms may be severe with damaging Winds and large hail. Temperatures in the upper 70s. Southwest Winds 5 to 10 Mph. Chance of precipitation 50 percent.

Tonight 21 Aug Northern Will

Mostly cloudy in the Evening, then becoming partly cloudy. A chance of Thunderstorms early in the evening. A chance of Showers in the evening. A chance of Thunderstorms late in the evening. Some Thunderstorms may be severe with damaging Winds and large hail early in the evening. Lows in the lower 60s. Southwest Winds around 5 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Run County Forest Preserve Temperature Statistics

August Temperature

Joliet Regional Airport (1.2 miles)

  • Lowest 3 August, 2026

    60.6 °F

  • Average August

    75 °F

  • Highest 10 August, 2026

    89.4 °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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