Arlington Heights Weather Forecast

    • 50
    • 73

    Rain Showers

    • 42
    • 57

    Rain Showers Likely

    • 46
    • 66

    Chance Rain Showers

    • 40
    • 54

    Slight Chance Rain Showers

    • 42
    • 57

    Partly Sunny

    • 42
    • 61

    Slight Chance Rain Showers

Today 18 Oct Northern Cook

Mostly cloudy. Showers likely with a chance of Thunderstorms early in the Morning, then a chance of Showers with a slight chance of Thunderstorms in the late morning and afternoon. Highs in the lower 70s. Southwest Winds 10 to 15 Mph. Chance of precipitation 60 percent.

Tonight 18 Oct Northern Cook

A chance of Showers and Thunderstorms early in the Evening, then a slight chance of Thunderstorms in the late evening and early morning. Showers in the late evening and overnight. Breezy with Lows around 50. Southwest Winds 5 to 10 Mph, increasing to west 15 to 20 Mph with Gusts up to 30 Mph after midnight. Chance of precipitation 90 percent.

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Arlington Heights Temperature Statistics

October Temperature

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

  • Lowest 9 October, 2025

    43 °F

  • Average October

    63.4 °F

  • Highest 3 October, 2025

    89.1 °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

    61.6 °F
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