Rock Run County Forest Preserve Weather Forecast

    • 66
    • 89

    Partly Sunny

    • 62
    • 80

    Mostly Sunny

    • 64
    • 82

    Partly Sunny

    • 72
    • 89

    Partly Sunny

    • 67
    • 91

    Chance Rain Showers

    • 61
    • 83

    Slight Chance Rain Showers

Today 5 Sep Northern Will

Partly cloudy. Patchy fog early in the morning. Humid with Highs in the mid 80s. Northeast Winds 5 to 10 Mph.

Tonight 5 Sep Northern Will

Partly cloudy. A slight chance of Showers and Thunderstorms. Patchy fog late. Lows in the lower 70s. East Winds around 5 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Run County Forest Preserve Temperature Statistics

September Temperature

Joliet Regional Airport (1.2 miles)

  • Lowest 2 September, 2026

    72.9 °F

  • Average September

    83.7 °F

  • Highest 2 September, 2026

    95.9 °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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