Arlington Heights Weather Forecast

    • 56
    • 75

    Mostly Sunny

    • 58
    • 78

    Mostly Sunny

    • 59
    • 80

    Mostly Sunny

    • 49
    • 77

    Rain Showers Likely

    • 48
    • 62

    Mostly Cloudy

    • 49
    • 66

    Slight Chance Rain Showers

Today 31 Aug Northern Cook

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

Tonight 31 Aug Northern Cook

Mostly clear. Lows in the mid 50s. Northeast Winds 5 to 10 Mph.

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Arlington Heights Temperature Statistics

August Temperature

Chicago / Wheeling, Pal-Waukee Airport (4.3 miles)

  • Lowest 2 August, 2025

    58.6 °F
  • Average August

    76.5 °F
  • Highest 9 August, 2025

    96.7 °F

Climate (2020–Present)

Chicago / Wheeling, Pal-Waukee Airport (4.3 miles)

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  • Average Low 2020–2025

    44.2 °F
  • Average 2020–2025

    53 °F
  • Average High 2020–2025

    61.5 °F
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