Irwin Weather Forecast

    • 71
    • 83

    Isolated Thunderstorms

    • 72
    • 91

    Rain Showers

    • 73
    • 92

    Chance Thunderstorms

    • 67
    • 90

    Rain Showers Likely

    • 62
    • 83

    Chance Rain Showers

    • 60
    • 80

    Partly Sunny

Today 31 Aug Westmoreland

Considerable cloudiness with scattered Showers. Isolated Thunderstorms. Highs in the mid 80s. Southwest Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 31 Aug Westmoreland

Mostly cloudy. Humid with Lows in the lower 70s. Southwest Winds 5 to 10 Mph.

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Irwin Temperature Statistics

August Temperature

Pittsburgh - Allegheny County Airport (11.2 miles)

  • Lowest 24 August, 2026

    55.9 °F

  • Average August

    71.2 °F

  • Highest 4 August, 2026

    86 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (11.2 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.3 °F
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