Prospect Heights Weather Forecast

    • 54
    • 70

    Mostly Cloudy

    • 56
    • 72

    Mostly Cloudy

    • 56
    • 78

    Partly Sunny

    • 57
    • 77

    Mostly Sunny

    • 63
    • 82

    Mostly Sunny

    • 69
    • 88

    Mostly Cloudy

Today 30 May Northern Cook

Mostly cloudy. Highs in the lower 70s Inland, but only in the mid 60s near the lake. East Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 30 May Northern Cook

Mostly cloudy. Lows in the mid 50s. East Winds 10 to 15 Mph, becoming southeast 5 to 10 Mph after midnight.

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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

    58.2 °F

  • Highest 17 May, 2026

    85.6 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    61.6 °F
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