Arlington Heights Weather Forecast

    • 26
    • 42

    Mostly Cloudy

    • 29
    • 51

    Rain

    • 23
    • 37

    Chance Snow

    • 30
    • 44

    Mostly Cloudy

    • 24
    • 40

    Mostly Cloudy

    • 28
    • 38

    Chance Rain Showers

Today 17 Dec Allegheny

Mostly cloudy in the Morning, then becoming partly sunny. Highs in the lower 40s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 17 Dec Allegheny

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the mid 20s. South Winds around 5 Mph.

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Arlington Heights Temperature Statistics

December Temperature

Pittsburgh - Allegheny County Airport (4.3 miles)

  • Lowest 14 December, 2025

    10 °F

  • Average December

    26.6 °F

  • Highest 10 December, 2025

    43 °F

Climate (2020–Present)

Pittsburgh - Allegheny County Airport (4.3 miles)

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  • Average Low 2020–2025

    46.1 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    63.2 °F
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