Arlington Heights Weather Forecast

    • 60
    • 84

    Mostly Sunny

    • 62
    • 84

    Mostly Sunny

    • 64
    • 86

    Partly Sunny

    • 63
    • 81

    Chance Rain Showers

    • 62
    • 78

    Chance Rain Showers

    • 61
    • 78

    Chance Rain Showers

Today 16 Sep Northern Cook

Mostly sunny. Highs in the mid 80s Inland, but only in the upper 70s near the lake. East Winds 5 to 10 Mph.

Tonight 16 Sep Northern Cook

Partly cloudy early in the Evening, then becoming mostly clear. Lows around 60. Northeast Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Arlington Heights Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (4.3 miles)

  • Lowest 7 September, 2025

    46.9 °F

  • Average September

    64.5 °F

  • Highest 12 September, 2025

    84.9 °F

Climate (2020–Present)

Chicago / Wheeling, Pal-Waukee Airport (4.3 miles)

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

  • Average Low 2020–2025

    44.1 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    61.5 °F
Get WillyWeather+ to remove ads