Winnetka Weather Forecast

    • 64
    • 71

    Chance Thunderstorms

    • 64
    • 74

    Chance Thunderstorms

    • 64
    • 72

    Rain Showers Likely

    • 65
    • 80

    Rain Showers Likely

    • 61
    • 74

    Chance Rain Showers

    • 60
    • 71

    Slight Chance Rain Showers

Today 16 Sep Northern Cook

Mostly cloudy. A slight chance of Showers and Thunderstorms in the Morning, then a chance of Showers and Thunderstorms early in the afternoon. A slight chance of Showers and Thunderstorms late. Highs in the lower 70s. Northeast Winds 5 to 10 Mph. Chance of precipitation 30 percent.

Tonight 16 Sep Northern Cook

Mostly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers and Thunderstorms after midnight. Near steady temperature in the mid 60s. Northeast Winds around 5 Mph. Chance of precipitation 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Winnetka Temperature Statistics

September Temperature

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

  • Lowest 13 September, 2026

    54 °F

  • Average September

    75 °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

    61.6 °F
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