Rock Run County Forest Preserve Weather Forecast

    • 45
    • 45

    Rain Showers

    • 18
    • 60

    Rain Showers

    • 13
    • 24

    Chance Snow Showers

    • 22
    • 28

    Mostly Cloudy

    • 12
    • 32

    Slight Chance Snow

    • 6
    • 19

    Mostly Sunny

Today 27 Dec Northern Will

Cloudy. Areas of fog early in the Morning, then patchy fog late in the morning. Highs in the upper 40s. Southeast Winds 5 to 10 Mph.

Tonight 27 Dec Northern Will

Cloudy. A slight chance of rain in the Evening, then a chance of rain after midnight. Lows in the mid 40s. Southeast Winds 10 to 15 Mph, becoming south 5 to 10 Mph after midnight. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Run County Forest Preserve Temperature Statistics

December Temperature

Joliet Regional Airport (1.2 miles)

  • Lowest 5 December, 2025

    -1.1 °F

  • Average December

    27.5 °F

  • Highest 18 December, 2025

    51.8 °F

Climate (2020–Present)

Joliet Regional Airport (1.2 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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