Lake Arlington Weather Forecast

    • 49
    • 72

    Becoming Sunny

    • 47
    • 70

    Mostly Sunny

    • 51
    • 70

    Partly Sunny

    • 54
    • 69

    Mostly Cloudy

    • 52
    • 71

    Mostly Cloudy

    • 47
    • 64

    Mostly Cloudy

Today 21 Oct Northern Cook

Mostly sunny. Areas of dense fog early in the morning. Highs in the lower 70s. Southwest Winds around 5 Mph.

Tonight 21 Oct Northern Cook

Clear. Lows in the upper 40s. South Winds around 5 Mph in the Evening, becoming light and variable.

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Lake Arlington Temperature Statistics

October Temperature

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

  • Lowest 17 October, 2026

    37.9 °F

  • Average October

    61.4 °F

  • Highest 12 October, 2026

    88.6 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.5 °F
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