Lake Arlington Weather Forecast

    • 65
    • 79

    Thunderstorms Likely

    • 60
    • 79

    Slight Chance Thunderstorms

    • 58
    • 76

    Mostly Sunny

    • 60
    • 77

    Partly Sunny

    • 65
    • 80

    Mostly Cloudy

    • 64
    • 81

    Slight Chance Thunderstorms

Today 21 Aug Northern Cook

Mostly cloudy. A slight chance of Showers and Thunderstorms early in the afternoon. A chance of Showers and Thunderstorms late. Highs around 80. Southwest Winds 5 to 10 Mph. Chance of precipitation 50 percent.

Tonight 21 Aug Northern Cook

Partly cloudy. Near steady temperature in the lower 60s. West Winds around 5 Mph.

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Lake Arlington Temperature Statistics

August Temperature

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

  • Lowest 3 August, 2026

    61.6 °F

  • Average August

    74.3 °F

  • Highest 7 August, 2026

    87.7 °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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