Summit Weather Forecast

    • 40
    • 49

    Chance Rain

    • 43
    • 45

    Cloudy

    • 21
    • 58

    Rain Showers

    • 16
    • 27

    Blustery

    • 22
    • 30

    Mostly Cloudy

    • 13
    • 29

    Mostly Cloudy

Today 26 Dec Central Cook

Cloudy. Areas of dense fog in the morning. Intermittent rain early in the morning. Highs in the upper 40s. Southwest Winds 5 to 10 Mph, becoming northwest in the afternoon. Chance of precipitation 70 percent.

Tonight 26 Dec Central Cook

Cloudy. Lows around 40. North Winds around 5 Mph, becoming northeast after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Summit Temperature Statistics

December Temperature

Chicago, Chicago Midway Airport (2.5 miles)

  • Lowest 14 December, 2025

    -0.9 °F

  • Average December

    26.8 °F

  • Highest 23 December, 2025

    54 °F

Climate (2020–Present)

Chicago, Chicago Midway Airport (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    46.7 °F

  • Average 2020–2025

    54.3 °F

  • Average High 2020–2025

    61.8 °F
Get WillyWeather+ to remove ads