Cook County Forest Preserve Weather Forecast

    • 31
    • 32

    Decreasing Clouds

    • 35
    • 39

    Mostly Cloudy

    • 33
    • 42

    Chance Drizzle

    • 38
    • 47

    Partly Sunny

    • 36
    • 50

    Chance Rain

    • 30
    • 43

    Chance Rain

    • 20
    • 35

    Chance Snow

Today 4 Jan Northern Cook

Partly cloudy in the Morning, then becoming mostly cloudy. Highs in the lower 30s. West Winds around 5 Mph, becoming south in the afternoon.

Tonight 4 Jan Northern Cook

Cloudy in the Evening, then becoming partly cloudy. Near steady temperature in the lower 30s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cook County Forest Preserve Temperature Statistics

January Temperature

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

  • Lowest 1 January, 2026

    10.9 °F

  • Average January

    17.9 °F

  • Highest 2 January, 2026

    24.1 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    45.4 °F

  • Average 2021–2026

    53.4 °F

  • Average High 2021–2026

    61.6 °F
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