Prospect Heights Weather Forecast

    • 66
    • 82

    Decreasing Clouds

    • 64
    • 77

    Mostly Sunny

    • 65
    • 80

    Partly Sunny

    • 72
    • 87

    Mostly Cloudy

    • 67
    • 90

    Slight Chance Thunderstorms

    • 62
    • 81

    Slight Chance Rain Showers

Today 5 Sep Northern Cook

Mostly cloudy in the Morning, then becoming partly cloudy. Patchy fog early in the morning. Humid with Highs in the mid 80s Inland, but only around 80 near the lake. Northeast Winds 5 to 10 Mph.

Tonight 5 Sep Northern Cook

Partly cloudy. A slight chance of Showers and Thunderstorms. Patchy fog late. Lows in the lower 70s. North Winds around 5 Mph. Chance of precipitation 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Prospect Heights Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (2.5 miles)

  • Lowest 1 September, 2026

    72.6 °F

  • Average September

    85.1 °F

  • Highest 1 September, 2026

    95.6 °F

Climate (2021–2026)

Chicago / Wheeling, Pal-Waukee Airport (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.6 °F
Get WillyWeather+ to remove ads