Winnetka Weather Forecast

    • 75
    • 92

    Partly Sunny

    • 73
    • 89

    Chance Thunderstorms

    • 71
    • 83

    Chance Thunderstorms

    • 70
    • 83

    Chance Rain Showers

    • 67
    • 82

    Slight Chance Rain Showers

    • 65
    • 79

    Mostly Cloudy

Today 2 Sep Northern Cook

Partly cloudy. Hot, humid with Highs in the lower 90s. Southwest Winds 5 to 10 Mph, increasing to 10 to 15 Mph with Gusts up to 25 Mph in the afternoon.

Tonight 2 Sep Northern Cook

Partly cloudy. A slight chance of Showers late. Humid with Lows in the mid 70s. Southwest Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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Winnetka Temperature Statistics

September Temperature

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

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  • Average September

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Climate (2021–2026)

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

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.5 °F
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