Winnetka Weather Forecast

    • 65
    • 67

    Rain Showers

    • 58
    • 70

    Rain Showers

    • 52
    • 62

    Partly Sunny

    • 51
    • 61

    Partly Sunny

    • 50
    • 64

    Mostly Sunny

    • 48
    • 59

    Mostly Sunny

Today 30 Sep Northern Cook

Showers with a slight chance of Thunderstorms. Near steady temperature in the mid 60s. Southwest Winds 10 to 15 Mph. Chance of precipitation near 100 percent.

Tonight 30 Sep Northern Cook

Showers. A slight chance of Thunderstorms in the late evening and overnight. Near steady temperature in the mid 60s. Southwest Winds 5 to 10 Mph. Chance of precipitation 90 percent.

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Winnetka Temperature Statistics

September Temperature

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

  • Lowest 26 September, 2026

    47.6 °F

  • Average September

    69.6 °F

  • Highest 2 September, 2026

    96.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.5 °F
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