Mount Prospect Weather Forecast

    • 65
    • 80

    Mostly Sunny

    • 62
    • 86

    Partly Sunny

    • 59
    • 76

    Chance Thunderstorms

    • 68
    • 78

    Chance Rain Showers

    • 61
    • 81

    Rain Showers Likely

    • 62
    • 74

    Chance Rain Showers

Today 11 Sep Northern Cook

Mostly sunny. Near steady temperature in the upper 70s. Southeast Winds 5 to 10 Mph.

Tonight 11 Sep Northern Cook

Partly cloudy. Lows in the mid 60s. Southeast Winds 5 to 10 Mph, becoming south after midnight.

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Mount Prospect Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (3.7 miles)

  • Lowest 7 September, 2026

    59.6 °F

  • Average September

    77.7 °F

  • Highest 2 September, 2026

    96.7 °F

Climate (2021–2026)

Chicago / Wheeling, Pal-Waukee Airport (3.7 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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