Summit Weather Forecast

    • 18
    • 30

    Snow

    • 18
    • 26

    Mostly Cloudy

    • 6
    • 33

    Chance Snow

    • 2
    • 17

    Partly Sunny

    • 18
    • 24

    Chance Snow

    • 21
    • 30

    Slight Chance Snow

Today 1 Dec Central Cook

Intermittent Flurries early in the afternoon. Snow late. Snow accumulation around an inch. Highs around 30. South Winds around 5 Mph. Chance of precipitation near 100 percent.

Tonight 1 Dec Central Cook

Snow, mainly in the evening. Total snow accumulation of 2 to 4 Inches. Lows around 19. South Winds around 5 Mph, becoming west after midnight. Chance of precipitation near 100 percent.

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Summit Temperature Statistics

December Temperature

Chicago, Chicago Midway Airport (2.5 miles)

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Climate (2020–Present)

Chicago, Chicago Midway Airport (2.5 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    54.4 °F

  • Average High 2020–2025

    61.9 °F
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