Summit Weather Forecast

    • 2
    • 19

    Snow

    • 5
    • 8

    Cold

    • 15
    • 21

    Chance Snow

    • 11
    • 30

    Slight Chance Snow

    • 8
    • 18

    Mostly Cloudy

    • 4
    • 20

    Chance Snow

    • -2
    • 13

    Chance Snow

Today 18 Jan Central Cook

Snow likely toward Sunset. Temperatures around 19. Southwest Winds around 10 Mph. Chance of precipitation 70 percent.

Tonight 18 Jan Central Cook

Snow in the Evening, then scattered snow Showers after midnight. Isolated snow Showers late. Total snow accumulation around an inch. Windy. Lows around 2 above. Southwest Winds 10 to 15 Mph, increasing to northwest 15 to 25 Mph with Gusts up to 40 Mph after midnight. Chance of precipitation near 100 percent. Wind chill Values as low as 18 below after midnight.

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Summit Temperature Statistics

January Temperature

Chicago, Chicago Midway Airport (2.5 miles)

  • Lowest 1 January, 2026

    12 °F

  • Average January

    32.7 °F

  • Highest 8 January, 2026

    60.1 °F

Climate (2021–Present)

Chicago, Chicago Midway Airport (2.5 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    61.9 °F
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