Irwin Weather Forecast

    • 20
    • 27

    Snow Likely

    • 15
    • 31

    Snow

    • 13
    • 23

    Mostly Cloudy

    • 15
    • 33

    Mostly Cloudy

    • 15
    • 29

    Mostly Cloudy

    • 20
    • 32

    Mostly Cloudy

    • 25
    • 38

    Chance Rain

Today 30 Dec Westmoreland

Considerable cloudiness. Patchy blowing snow. Near steady temperature in the mid 20s. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 30 Dec Westmoreland

Considerable cloudiness. Snow likely after midnight. Snow accumulation less than an inch. Lows around 19. West Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of snow 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Irwin Temperature Statistics

December Temperature

Pittsburgh - Allegheny County Airport (11.2 miles)

  • Lowest 15 December, 2025

    7 °F

  • Average December

    31.1 °F

  • Highest 28 December, 2025

    64 °F

Climate (2020–Present)

Pittsburgh - Allegheny County Airport (11.2 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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