Summit Weather Forecast

    • 35
    • 40

    Mostly Cloudy

    • 33
    • 42

    Slight Chance Rain

    • 38
    • 47

    Partly Sunny

    • 37
    • 50

    Chance Rain

    • 30
    • 44

    Chance Rain

    • 21
    • 36

    Slight Chance Snow

Today 5 Jan Central Cook

Mostly cloudy. Highs in the lower 40s. Southwest Winds 5 to 10 Mph.

Tonight 5 Jan Central Cook

Mostly cloudy. Patchy fog. A chance of snow with a slight chance of drizzle late. Near steady temperature in the upper 30s. South Winds around 5 Mph. Chance of precipitation 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summit Temperature Statistics

January Temperature

Chicago, Chicago Midway Airport (2.5 miles)

  • Lowest 1 January, 2026

    12 °F

  • Average January

    21 °F

  • Highest 3 January, 2026

    28 °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

    61.8 °F
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