Winnetka Weather Forecast

    • 61
    • 75

    Mostly Cloudy

    • 64
    • 77

    Partly Sunny

    • 64
    • 77

    Mostly Sunny

    • 68
    • 80

    Partly Sunny

    • 67
    • 85

    Slight Chance Rain Showers

    • 63
    • 78

    Partly Sunny

Today 9 Sep Northern Cook

Partly cloudy in the Morning, then becoming mostly cloudy. Highs in the mid 70s. South Winds 5 to 10 Mph.

Tonight 9 Sep Northern Cook

Decreasing cloudiness. Lows in the upper 50s. South Winds around 5 Mph.

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Winnetka Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (8.7 miles)

  • Lowest 4 September, 2025

    48 °F

  • Average September

    63 °F

  • Highest 2 September, 2025

    78.1 °F

Climate (2020–Present)

Chicago / Wheeling, Pal-Waukee Airport (8.7 miles)

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  • Average Low 2020–2025

    44.1 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    61.4 °F
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