Cook County Forest Preserve Weather Forecast
- 75
- 93
Chance Thunderstorms
- 75
- 97
Slight Chance Thunderstorms
- 68
- 88
Chance Thunderstorms
- 67
- 84
Mostly Sunny
- 69
- 87
Mostly Cloudy
- 67
- 85
Chance Rain Showers
Today 4 Jul Northern Cook
Mostly cloudy through mid Afternoon, then becoming partly cloudy. A chance of Showers in the morning. A slight chance of Thunderstorms through mid afternoon. A slight chance of Showers early to mid afternoon. Highs in the lower 90s Inland, but only in the upper 80s near the lake. Southwest Winds 5 to 10 Mph. Chance of precipitation 50 percent.
Tonight 4 Jul Northern Cook
Mostly clear. Lows in the mid 70s. South Winds 5 to 10 Mph.
Cook County Forest Preserve Temperature Statistics
July Temperature
Chicago, Chicago-O'Hare International Airport (2.5 miles)
Lowest 1 July, 2025
71.1 °FAverage July
79.4 °FHighest 1 July, 2025
87.1 °F
Climate (2020–Present)
Chicago, Chicago-O'Hare International Airport (2.5 miles)
Average Low 2020–2025
45.4 °FAverage 2020–2025
53.5 °FAverage High 2020–2025
61.7 °F