Lake Arlington Weather Forecast

    • 64
    • 80

    Increasing Clouds

    • 60
    • 85

    Partly Sunny

    • 59
    • 76

    Chance Thunderstorms

    • 67
    • 78

    Chance Rain Showers

    • 60
    • 80

    Rain Showers Likely

    • 61
    • 74

    Chance Rain Showers

Today 11 Sep Northern Cook

Sunny. Highs around 80 Inland, but only in the mid 70s near the lake. Southeast Winds 5 to 10 Mph.

Tonight 11 Sep Northern Cook

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 60s. South Winds around 5 Mph.

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Lake Arlington Temperature Statistics

September Temperature

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

  • Lowest 7 September, 2026

    59.6 °F

  • Average September

    77.7 °F

  • Highest 2 September, 2026

    96.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    61.6 °F
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