Summit Weather Forecast
- 68
- 83
Rain Showers
- 66
- 73
Rain Showers
- 63
- 74
Partly Sunny
- 64
- 78
Mostly Sunny
- 67
- 82
Partly Sunny
- 68
- 84
Slight Chance Thunderstorms
Today 31 Jul Central Cook
Mostly cloudy. A chance of Showers early in the afternoon. Showers likely and a slight chance of Thunderstorms late. Highs in the lower 80s. Temperature falling into the mid 70s in the afternoon. South Winds 5 to 10 Mph, increasing to 10 to 15 Mph in the afternoon. Chance of precipitation 70 percent.
Tonight 31 Jul Central Cook
Showers with a chance of Thunderstorms. Lows in the upper 60s. East Winds 10 to 15 Mph. Gusts up to 25 Mph after midnight. Chance of precipitation near 100 percent.
Summit Temperature Statistics
July Temperature
Chicago, Chicago Midway Airport (2.5 miles)
Lowest 23 July, 2026
59 °FAverage July
77.7 °FHighest 14 July, 2026
95 °F
Climate (2021–2026)
Chicago, Chicago Midway Airport (2.5 miles)
Average Low 2021–2026
46.7 °FAverage 2021–2026
54.3 °FAverage High 2021–2026
62 °F