West Mifflin Weather Forecast

    • 19
    • 42

    Rain Likely

    • 30
    • 45

    Mostly Cloudy

    • 18
    • 35

    Partly Sunny

    • 28
    • 36

    Chance Rain/Snow

    • 34
    • 44

    Chance Rain

    • 37
    • 45

    Chance Rain

Today 19 Dec Allegheny

Considerable cloudiness. Rain Showers with a chance of snow Showers in the Morning, then a slight chance of snow Showers in the afternoon. Breezy with Highs in the lower 40s. Temperatures falling into the mid 20s in the afternoon. West Winds 15 to 25 Mph with Gusts up to 40 Mph. Chance of precipitation 90 percent.

Tonight 19 Dec Allegheny

Considerable cloudiness in the Evening, then becoming partly cloudy. Much Colder with Lows around 19. West Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming southwest 5 to 10 Mph with Gusts up to 20 Mph after midnight.

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West Mifflin Temperature Statistics

December Temperature

Pittsburgh - Allegheny County Airport (2.5 miles)

  • Lowest 15 December, 2025

    7 °F

  • Average December

    25.7 °F

  • Highest 10 December, 2025

    43 °F

Climate (2020–Present)

Pittsburgh - Allegheny County Airport (2.5 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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