Lake Arlington Weather Forecast

    • 57
    • 66

    Drizzle

    • 54
    • 63

    Cloudy

    • 53
    • 63

    Mostly Cloudy

    • 53
    • 64

    Mostly Cloudy

    • 53
    • 66

    Mostly Cloudy

    • 53
    • 68

    Partly Sunny

    • 55
    • 71

    Partly Sunny

Today 20 Sep Northern Cook

Mostly cloudy. Highs in the mid 70s Inland, but only around 70 near the lake.

Tonight 20 Sep Northern Cook

Cloudy. Areas of drizzle and Showers likely in the evening. A chance of Showers after midnight. Breezy. Lows in the upper 50s. Northeast Winds 15 to 20 Mph, Diminishing to 10 to 15 Mph after midnight. Gusts up to 30 Mph. Chance of precipitation 60 percent.

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Lake Arlington Temperature Statistics

September Temperature

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

  • Lowest 14 September, 2026

    50.6 °F

  • Average September

    73.3 °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

    52.8 °F

  • Average High 2021–2026

    61.5 °F
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