Mount Prospect Weather Forecast

    • 51
    • 70

    Partly Sunny

    • 55
    • 72

    Mostly Sunny

    • 62
    • 74

    Rain Showers Likely

    • 63
    • 72

    Rain Showers Likely

    • 59
    • 71

    Chance Rain Showers

    • 57
    • 67

    Chance Rain Showers

Today 27 Sep Northern Cook

Partly cloudy. Highs around 70 Inland, but only in the mid 60s near the lake. Northeast Winds 5 to 10 Mph.

Tonight 27 Sep Northern Cook

Partly cloudy. Lows in the lower 50s. North Winds around 5 Mph.

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Mount Prospect Temperature Statistics

September Temperature

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

  • Lowest 14 September, 2026

    50.6 °F

  • Average September

    71 °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

    52.8 °F

  • Average High 2021–2026

    61.5 °F
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