Prospect Heights Weather Forecast

    • 60
    • 79

    Slight Chance Thunderstorms

    • 57
    • 76

    Mostly Sunny

    • 60
    • 77

    Partly Sunny

    • 64
    • 80

    Partly Sunny

    • 64
    • 83

    Chance Thunderstorms

    • 64
    • 81

    Partly Sunny

Today 22 Aug Northern Cook

Mostly sunny late in the Morning, then becoming partly cloudy. A slight chance of Showers and Thunderstorms in the afternoon. Highs in the upper 70s. Northwest Winds 10 to 15 Mph. Gusts up to 25 Mph in the afternoon. Chance of precipitation 20 percent.

Tonight 22 Aug Northern Cook

Mostly clear. A slight chance of Showers and Thunderstorms early in the evening. Lows around 60. Northwest Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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Prospect Heights Temperature Statistics

August Temperature

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

  • Lowest 20 August, 2026

    61 °F

  • Average August

    74 °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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