Summit Weather Forecast

    • 40
    • 52

    Chance Rain Showers

    • 40
    • 64

    Mostly Cloudy

    • 45
    • 66

    Partly Sunny

    • 32
    • 59

    Mostly Cloudy

    • 31
    • 42

    Partly Sunny

    • 37
    • 51

    Mostly Cloudy

Today 19 Mar Central Cook

Mostly cloudy in the Morning, then becoming partly cloudy. A slight chance of rain Showers in the morning. Highs in the lower 50s Inland, but only in the mid 40s near the lake. East Winds around 5 Mph. Chance of precipitation 20 percent.

Tonight 19 Mar Central Cook

Mostly cloudy. Lows in the upper 30s. East Winds 5 to 10 Mph, becoming south after midnight.

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Summit Temperature Statistics

March Temperature

Chicago, Chicago Midway Airport (2.5 miles)

  • Lowest 16 March, 2026

    21 °F

  • Average March

    41.9 °F

  • Highest 6 March, 2026

    73 °F

Climate (2021–Present)

Chicago, Chicago Midway Airport (2.5 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    61.9 °F
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