Irwin Weather Forecast

    • 14
    • 32

    Snow

    • 15
    • 23

    Mostly Cloudy

    • 13
    • 30

    Mostly Cloudy

    • 15
    • 31

    Mostly Cloudy

    • 15
    • 30

    Mostly Cloudy

    • 27
    • 37

    Mostly Cloudy

    • 33
    • 43

    Chance Rain

Today 31 Dec Westmoreland

Snow. Snow accumulation around an inch. Near steady temperature around 30. Southwest Winds around 15 Mph with Gusts up to 30 Mph. Chance of snow 90 percent.

Tonight 31 Dec Westmoreland

Snow. Snow accumulation 2 to 4 Inches. Cold with Lows around 14. Southwest Winds 15 to 20 Mph, becoming west after midnight. Chance of snow near 100 percent.

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Irwin Temperature Statistics

December Temperature

Pittsburgh - Allegheny County Airport (11.2 miles)

  • Lowest 15 December, 2025

    7 °F

  • Average December

    31.2 °F

  • Highest 28 December, 2025

    64 °F

Climate (2021–Present)

Pittsburgh - Allegheny County Airport (11.2 miles)

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  • Average Low 2021–2025

    46.1 °F

  • Average 2021–2025

    54.6 °F

  • Average High 2021–2025

    63.3 °F
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