Prospect Heights Weather Forecast

    • 73
    • 81

    Rain Showers

    • 66
    • 85

    Chance Thunderstorms

    • 64
    • 80

    Partly Sunny

    • 67
    • 83

    Chance Thunderstorms

    • 63
    • 80

    Slight Chance Thunderstorms

    • 61
    • 75

    Slight Chance Thunderstorms

Today 15 Aug Northern Cook

Mostly cloudy. Showers with a chance of Thunderstorms in the Morning, then a chance of Showers with a slight chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall early in the morning. Humid with Highs around 80. Southeast Winds 5 to 10 Mph, becoming southwest in the afternoon. Chance of precipitation 90 percent.

Tonight 15 Aug Northern Cook

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers and Thunderstorms after midnight. Humid with Lows in the lower 70s. Southwest Winds around 5 Mph. Chance of precipitation 40 percent.

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Prospect Heights Temperature Statistics

August Temperature

Chicago / Wheeling, Pal-Waukee Airport (2.5 miles)

  • Lowest 3 August, 2026

    61.6 °F

  • Average August

    74.2 °F

  • Highest 7 August, 2026

    87.7 °F

Climate (2021–2026)

Chicago / Wheeling, Pal-Waukee Airport (2.5 miles)

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.6 °F
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