Wilmette Weather Forecast

    • 65
    • 80

    Mostly Sunny

    • 65
    • 78

    Chance Rain Showers

    • 66
    • 76

    Chance Rain Showers

    • 65
    • 77

    Rain Showers Likely

    • 64
    • 77

    Chance Rain Showers

    • 61
    • 76

    Chance Rain Showers

Today 18 Sep Northern Cook

Mostly sunny. Highs in the mid 80s Inland, but only around 80 near the lake. Southeast Winds around 5 Mph, becoming east in the afternoon.

Tonight 18 Sep Northern Cook

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 60s. Northeast Winds around 5 Mph.

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Wilmette Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (9.9 miles)

  • Lowest 7 September, 2025

    46.9 °F

  • Average September

    65.7 °F

  • Highest 12 September, 2025

    84.9 °F

Climate (2020–Present)

Chicago / Wheeling, Pal-Waukee Airport (9.9 miles)

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  • Average Low 2020–2025

    44.1 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    61.5 °F
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