Mount Prospect Weather Forecast

    • 67
    • 72

    Rain Showers Likely

    • 65
    • 80

    Rain Showers

    • 65
    • 71

    Rain Showers Likely

    • 64
    • 78

    Chance Rain Showers

    • 65
    • 78

    Rain Showers Likely

    • 62
    • 76

    Rain Showers Likely

Today 14 Sep Northern Cook

Mostly cloudy. A slight chance of Showers. Near steady temperature in the lower 70s. Southeast Winds 10 to 15 Mph. Chance of precipitation 20 percent.

Tonight 14 Sep Northern Cook

Mostly cloudy. A slight chance of Showers and Thunderstorms after midnight. Showers likely with a chance of Thunderstorms late. Near steady temperature in the upper 60s. South Winds 15 to 20 Mph with Gusts up to 25 Mph. Chance of precipitation 70 percent.

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  • Temperature Real-Time

Mount Prospect Temperature Statistics

September Temperature

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

  • Lowest 11 September, 2026

    56.6 °F

  • Average September

    75.9 °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

    61.6 °F
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