Prospect Heights Weather Forecast

    • 49
    • 79

    Chance Thunderstorms

    • 44
    • 56

    Partly Sunny

    • 48
    • 60

    Mostly Cloudy

    • 50
    • 63

    Rain Showers Likely

    • 53
    • 70

    Mostly Cloudy

    • 57
    • 74

    Partly Sunny

Today 19 May Northern Cook

Mostly cloudy. A slight chance of Showers in the late morning and early afternoon. Breezy. Highs in the upper 70s. West Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of precipitation 20 percent.

Tonight 19 May Northern Cook

Partly cloudy. Lows in the upper 40s. Northwest Winds 10 to 15 Mph.

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Prospect Heights Temperature Statistics

May Temperature

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

  • Lowest 2 May, 2026

    30.7 °F

  • Average May

    54.8 °F

  • Highest 17 May, 2026

    84.9 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    44.1 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    61.6 °F
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