Summit Weather Forecast

    • 64
    • 81

    Gradual Clearing

    • 72
    • 82

    Mostly Cloudy

    • 76
    • 91

    Chance Thunderstorms

    • 74
    • 94

    Slight Chance Thunderstorms

    • 69
    • 88

    Mostly Sunny

    • 69
    • 84

    Slight Chance Thunderstorms

Today 24 Jul Central Cook

Mostly cloudy in the Morning, then becoming partly cloudy. Highs in the lower 80s Inland, but only in the upper 70s near the lake. South Winds 5 to 10 Mph.

Tonight 24 Jul Central Cook

Mostly clear. Lows in the mid 60s. South Winds 5 to 10 Mph.

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Summit Temperature Statistics

July Temperature

Chicago, Chicago Midway Airport (2.5 miles)

  • Lowest 5 July, 2026

    66.9 °F

  • Average July

    79.2 °F

  • Highest 14 July, 2026

    95 °F

Climate (2021–2026)

Chicago, Chicago Midway Airport (2.5 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    54.4 °F

  • Average High 2021–2026

    62 °F
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