Monongahela Weather Forecast

    • 21
    • 48

    Snow Showers

    • 20
    • 30

    Chance Snow

    • 15
    • 34

    Snow

    • 13
    • 26

    Slight Chance Snow

    • 15
    • 29

    Mostly Cloudy

    • 16
    • 33

    Mostly Cloudy

Today 29 Dec Washington

Snow likely. Little or no snow accumulation. Windy. Near steady temperature in the upper 20s. Temperatures falling into the upper 20s late. West Winds 20 to 30 Mph with Gusts up to 45 Mph. Chance of snow 70 percent.

Tonight 29 Dec Washington

Considerable cloudiness. Snow Likely, mainly in the evening. Patchy blowing snow. Snow accumulation less than an inch. Blustery with Lows in the lower 20s. West Winds 20 to 25 Mph with Gusts up to 45 Mph. Chance of snow 70 percent.

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Monongahela Temperature Statistics

December Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 15 December, 2025

    7 °F

  • Average December

    30.5 °F

  • Highest 18 December, 2025

    57.9 °F

Climate (2020–Present)

Pittsburgh - Allegheny County Airport (9.9 miles)

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  • Average Low 2020–2025

    46.1 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    63.3 °F
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