Prospect Heights Weather Forecast

    • 57
    • 81

    Mostly Cloudy

    • 54
    • 70

    Mostly Cloudy

    • 56
    • 72

    Mostly Cloudy

    • 57
    • 78

    Partly Sunny

    • 58
    • 77

    Mostly Sunny

    • 62
    • 81

    Partly Sunny

Today 29 May Northern Cook

Mostly sunny. Highs in the mid 80s Inland, but only in the upper 60s near the lake. Southeast Winds 5 to 10 Mph.

Tonight 29 May Northern Cook

Partly cloudy. Lows in the mid 50s. Northeast Winds 5 to 10 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

    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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