Cook County Forest Preserve Weather Forecast

    • 43
    • 43

    Rain Likely

    • 17
    • 56

    Blizzard

    • 13
    • 25

    Blizzard

    • 23
    • 28

    Mostly Cloudy

    • 15
    • 32

    Chance Snow

    • 11
    • 22

    Mostly Sunny

    • 18
    • 26

    Mostly Sunny

Today 27 Dec Northern Cook

Cloudy. Near steady temperature in the lower 40s. Southeast Winds 5 to 10 Mph.

Tonight 27 Dec Northern Cook

Cloudy. Patchy fog. A slight chance of Showers late in the evening. A chance of Showers after Midnight, then Showers likely late. Lows in the lower 40s. Southeast Winds 5 to 10 Mph. Chance of precipitation 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cook County Forest Preserve Temperature Statistics

December Temperature

Chicago, Chicago-O'Hare International Airport (2.5 miles)

  • Lowest 14 December, 2025

    -2 °F

  • Average December

    26.6 °F

  • Highest 23 December, 2025

    53.1 °F

Climate (2020–Present)

Chicago, Chicago-O'Hare International Airport (2.5 miles)

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  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    53.4 °F

  • Average High 2020–2025

    61.7 °F
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