Arlington Heights Weather Forecast

    • 33
    • 42

    Mostly Cloudy

    • 34
    • 47

    Mostly Cloudy

    • 35
    • 49

    Mostly Cloudy

    • 37
    • 49

    Mostly Cloudy

    • 40
    • 50

    Rain Likely

    • 38
    • 49

    Rain Likely

    • 37
    • 47

    Chance Rain/Snow

Today 28 Dec Foothills and Valleys of the North Cascades

Partly sunny. Highs in the mid 30s to lower 40s. Light wind.

Tonight 28 Dec Foothills and Valleys of the North Cascades

Mostly cloudy. Lows in the lower to mid 30s. Light wind.

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Arlington Heights Temperature Statistics

December Temperature

Arlington Municipal Airport (5 miles)

  • Lowest 1 December, 2025

    30 °F

  • Average December

    45.6 °F

  • Highest 15 December, 2025

    60.1 °F

Climate (2020–Present)

Arlington Municipal Airport (5 miles)

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    59.8 °F
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