Summit Weather Forecast
- 16
- 23
Chance Flurries
- 25
- 29
Mostly Cloudy
- 12
- 32
Chance Snow
- 13
- 20
Partly Sunny
- 16
- 26
Mostly Cloudy
- 18
- 27
Mostly Cloudy
Today 29 Dec Central Cook
Snow early in the Morning, then a chance of snow late in the morning. A chance of Flurries in the afternoon. Little or no snow accumulation. Windy. Near steady temperature in the lower 20s. West Winds 20 to 30 Mph with Gusts up to 45 Mph, becoming northwest 15 to 25 Mph with Gusts up to 35 Mph in the afternoon. Chance of precipitation near 100 percent.
Tonight 29 Dec Central Cook
Cloudy, Blustery. Near steady temperature around 18. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph, Diminishing to 10 to 15 Mph after midnight.
Summit Temperature Statistics
December Temperature
Chicago, Chicago Midway Airport (2.5 miles)
Lowest 14 December, 2025
-0.9 °FAverage December
28.5 °FHighest 23 December, 2025
54 °F
Climate (2020–Present)
Chicago, Chicago Midway Airport (2.5 miles)
Average Low 2020–2025
46.8 °FAverage 2020–2025
54.3 °FAverage High 2020–2025
61.8 °F