Cook County Forest Preserve Weather Forecast
- 76
- 82
Slight Chance Thunderstorms
- 79
- 94
Partly Sunny
- 79
- 96
Mostly Sunny
- 79
- 97
Hot
- 77
- 96
Slight Chance Thunderstorms
- 73
- 93
Chance Thunderstorms
Today 28 Jun Northern Cook
Partly cloudy in the Morning, then becoming mostly cloudy. A slight chance of Showers and Thunderstorms in the afternoon. Highs in the lower 80s Inland, but only in the mid 70s near the lake. Southeast Winds 5 to 10 Mph, increasing to 10 to 15 Mph with Gusts up to 25 Mph in the afternoon. Chance of precipitation 20 percent.
Tonight 28 Jun Northern Cook
Partly cloudy. Humid with Lows in the mid 70s. Southeast Winds 10 to 15 Mph.
Cook County Forest Preserve Temperature Statistics
June Temperature
Chicago, Chicago-O'Hare International Airport (2.5 miles)
Lowest 2 June, 2026
50.6 °FAverage June
70.2 °FHighest 10 June, 2026
91.7 °F
Climate (2021–2026)
Chicago, Chicago-O'Hare International Airport (2.5 miles)
Average Low 2021–2026
45.3 °FAverage 2021–2026
53.5 °FAverage High 2021–2026
61.9 °F