Mount Prospect Weather Forecast

    • 57
    • 65

    Mostly Cloudy

    • 57
    • 67

    Partly Sunny

    • 53
    • 66

    Partly Sunny

    • 55
    • 67

    Mostly Cloudy

    • 54
    • 67

    Mostly Cloudy

    • 56
    • 70

    Partly Sunny

    • 61
    • 73

    Rain Showers Likely

Today 23 Sep Northern Cook

Mostly cloudy. Showers Likely, mainly in the morning. Highs in the upper 60s. Chance of precipitation 60 percent.

Tonight 23 Sep Northern Cook

Mostly cloudy. Lows in the upper 50s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Prospect Temperature Statistics

September Temperature

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

  • Lowest 14 September, 2026

    50.6 °F

  • Average September

    72.1 °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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