Arlington Heights Weather Forecast

    • 42
    • 62

    Sunny

    • 45
    • 67

    Increasing Clouds

    • 48
    • 67

    Mostly Sunny

    • 50
    • 69

    Mostly Sunny

    • 52
    • 70

    Mostly Sunny

    • 51
    • 68

    Partly Sunny

    • 53
    • 68

    Mostly Cloudy

Today 18 Oct Northern Cook

Mostly cloudy. Highs around 70.

Tonight 18 Oct Northern Cook

Clear. Lows in the lower 40s. Southwest Winds 5 to 10 Mph.

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Arlington Heights Temperature Statistics

October Temperature

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

  • Lowest 16 October, 2026

    43 °F

  • Average October

    62.8 °F

  • Highest 12 October, 2026

    88.6 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.5 °F
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