Prospect Heights Weather Forecast

    • 60
    • 80

    Slight Chance Thunderstorms

    • 58
    • 76

    Mostly Sunny

    • 61
    • 77

    Partly Sunny

    • 65
    • 80

    Mostly Cloudy

    • 65
    • 83

    Slight Chance Thunderstorms

    • 65
    • 82

    Slight Chance Thunderstorms

Today 22 Aug Northern Cook

Mostly sunny in the Morning, then becoming partly cloudy. A slight chance of Thunderstorms with isolated Showers 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. Lows in the upper 50s. Northwest Winds 5 to 10 Mph.

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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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