Irwin Weather Forecast

    • 72
    • 91

    Chance Thunderstorms

    • 73
    • 92

    Chance Rain Showers

    • 69
    • 90

    Rain Showers Likely

    • 63
    • 84

    Rain Showers Likely

    • 59
    • 80

    Mostly Sunny

    • 57
    • 78

    Mostly Sunny

Today 1 Sep Westmoreland

Partly cloudy with a slight chance of Showers and Thunderstorms. Hot with Highs around 90. Southwest Winds 10 to 15 Mph. Chance of rain 20 percent. Heat index Values in the upper 90s in the afternoon.

Tonight 1 Sep Westmoreland

Mostly cloudy in the Evening, then becoming partly cloudy. A chance of Thunderstorms in the evening. A chance of Showers. Warm with Lows in the lower 70s. Southwest Winds 5 to 10 Mph, becoming south after midnight. Chance of rain 50 percent.

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Irwin Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (11.2 miles)

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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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