Lake Arlington Weather Forecast

    • 59
    • 83

    Mostly Sunny

    • 60
    • 84

    Mostly Sunny

    • 63
    • 84

    Partly Sunny

    • 64
    • 82

    Chance Rain Showers

    • 64
    • 80

    Chance Rain Showers

    • 65
    • 81

    Chance Rain Showers

    • 62
    • 79

    Chance Rain Showers

Today 16 Sep Northern Cook

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

Tonight 16 Sep Northern Cook

Mostly clear. Patchy fog late. Lows around 60. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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Lake Arlington Temperature Statistics

September Temperature

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

  • Lowest 7 September, 2025

    46.9 °F

  • Average September

    65 °F

  • Highest 12 September, 2025

    84.9 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    44.1 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    61.5 °F
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