Prospect Heights Weather Forecast

    • 55
    • 67

    Chance Rain Showers

    • 58
    • 74

    Chance Rain Showers

    • 62
    • 84

    Mostly Sunny

    • 63
    • 86

    Partly Sunny

    • 60
    • 80

    Partly Sunny

    • 59
    • 77

    Partly Sunny

Today 23 May Northern Cook

Mostly cloudy. A slight chance of Showers early in the morning. Highs in the upper 60s Inland, but only around 60 near the lake. Northeast Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 23 May Northern Cook

Mostly cloudy. A slight chance of Showers late in the evening. A slight chance of Thunderstorms in the late evening and overnight. A chance of Showers after midnight. Lows in the mid 50s. East Winds 5 to 10 Mph, becoming southeast after midnight. Chance of precipitation 30 percent.

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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

    56.4 °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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