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.

Graph Plots Open in Graphs
  • Temperature Forecast NOAA

  • Temperature Real-Time

Cook County Forest Preserve Temperature Statistics

July Temperature

Chicago, Chicago-O'Hare International Airport (2.5 miles)

  • Lowest 1 July, 2025

    71.1 °F
  • Average July

    79.4 °F
  • Highest 1 July, 2025

    87.1 °F

Climate (2020–Present)

Chicago, Chicago-O'Hare International Airport (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More
  • Average Low 2020–2025

    45.4 °F
  • Average 2020–2025

    53.5 °F
  • Average High 2020–2025

    61.7 °F
Get WillyWeather+ to remove ads