Grand Crossing Weather Forecast

    • 64
    • 78

    Mostly Sunny

    • 66
    • 79

    Mostly Sunny

    • 66
    • 78

    Slight Chance Thunderstorms

    • 66
    • 79

    Slight Chance Thunderstorms

    • 68
    • 81

    Chance Rain Showers

    • 65
    • 79

    Chance Rain Showers

Today 17 Sep Central Cook

Mostly sunny. Highs in the mid 80s Inland, but only in the upper 70s near the lake. Northeast Winds around 5 Mph.

Tonight 17 Sep Central Cook

Mostly clear. Lows in the lower 60s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Grand Crossing Temperature Statistics

September Temperature

Chicago, Chicago Midway Airport (8.1 miles)

  • Lowest 7 September, 2025

    48.9 °F

  • Average September

    67.6 °F

  • Highest 12 September, 2025

    84.9 °F

Climate (2020–Present)

Chicago, Chicago Midway Airport (8.1 miles)

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  • Average Low 2020–2025

    46.6 °F

  • Average 2020–2025

    54.2 °F

  • Average High 2020–2025

    61.8 °F
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