Old Mill Creek Weather Forecast

    • 12
    • 40

    Becoming Sunny

    • 18
    • 27

    Partly Sunny

    • 35
    • 40

    Cloudy

    • 30
    • 44

    Mostly Cloudy

    • 41
    • 41

    Chance Rain

    • 36
    • 51

    Mostly Cloudy

    • 32
    • 44

    Mostly Cloudy

Today 20 Dec Lake

Mostly cloudy. A slight chance of snow in the late morning and early afternoon. Blustery. Highs in the upper 30s. Southwest Winds 15 to 20 Mph, becoming west 10 to 15 Mph in the afternoon. Gusts up to 30 Mph. Chance of precipitation 20 percent.

Tonight 20 Dec Lake

Mostly Clear, Blustery. Lows around 13. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

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Old Mill Creek Temperature Statistics

December Temperature

Chicago/Waukegan Regional Airport (5.6 miles)

  • Lowest 14 December, 2025

    -4 °F

  • Average December

    22 °F

  • Highest 18 December, 2025

    50 °F

Climate (2020–Present)

Chicago/Waukegan Regional Airport (5.6 miles)

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  • Average Low 2020–2025

    42.3 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    59.6 °F
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