Arlington Heights Weather Forecast

    • 50
    • 75

    Increasing Clouds

    • 49
    • 70

    Partly Sunny

    • 51
    • 74

    Mostly Sunny

    • 54
    • 71

    Rain

    • 50
    • 68

    Slight Chance Rain

    • 51
    • 72

    Slight Chance Rain

Today 17 Sep Foothills and Valleys of the North Cascades

Sunny. Highs in the 70s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 17 Sep Foothills and Valleys of the North Cascades

Partly cloudy. Lows in the upper 40s to mid 50s. Northwest wind to 10 Mph in the evening becoming light.

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Arlington Heights Temperature Statistics

September Temperature

Arlington Municipal Airport (5 miles)

  • Lowest 9 September, 2025

    51.8 °F

  • Average September

    62.8 °F

  • Highest 3 September, 2025

    81 °F

Climate (2020–Present)

Arlington Municipal Airport (5 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    59.7 °F
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