Summit Weather Forecast
- 41
- 56
Rain Showers
- 37
- 50
Mostly Cloudy
- 41
- 53
Partly Sunny
- 49
- 64
Chance Rain Showers
- 51
- 73
Chance Rain Showers
- 45
- 64
Chance Rain Showers
- 43
- 59
Chance Rain Showers
Today 30 Apr Central Cook
Mostly cloudy. A slight chance of Showers early in the afternoon. A chance of Showers late. Highs in the mid 50s Inland, but only in the lower 50s near the lake. Temperature falling into the mid 40s in the afternoon. Northwest Winds around 5 Mph, becoming northeast in the afternoon. Chance of precipitation 50 percent.
Tonight 30 Apr Central Cook
Mostly cloudy. Scattered Showers in the evening. Isolated Showers after midnight. Near steady temperature in the lower 40s. Northeast Winds 5 to 10 Mph, becoming north after midnight. Chance of precipitation 60 percent.
Summit Temperature Statistics
April Temperature
Chicago, Chicago Midway Airport (2.5 miles)
Lowest 7 April, 2026
30 °FAverage April
52.9 °FHighest 17 April, 2026
81 °F
Climate (2021–Present)
Chicago, Chicago Midway Airport (2.5 miles)
Average Low 2021–2026
46.7 °FAverage 2021–2026
54.4 °FAverage High 2021–2026
62 °F