The Gap Weather Forecast

    • 66
    • 75

    Mostly Sunny

    • 65
    • 77

    Mostly Sunny

    • 67
    • 78

    Mostly Sunny

    • 68
    • 81

    Partly Sunny

    • 66
    • 82

    Chance Thunderstorms

    • 61
    • 75

    Chance Thunderstorms

Today 14 Sep Central Cook

Mostly sunny. Highs in the lower 80s Inland, but only in the mid 70s near the lake. East Winds 5 to 10 Mph.

Tonight 14 Sep Central Cook

Clear. Lows in the mid 60s. East Winds 5 to 10 Mph.

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The Gap Temperature Statistics

September Temperature

Chicago, Chicago Midway Airport (7.5 miles)

  • Lowest 7 September, 2025

    48.9 °F

  • Average September

    65.9 °F

  • Highest 10 September, 2025

    82 °F

Climate (2020–Present)

Chicago, Chicago Midway Airport (7.5 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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