Irwin Weather Forecast

    • 42
    • 55

    Rain Showers Likely

    • 49
    • 69

    Partly Sunny

    • 62
    • 80

    Rain Showers

    • 62
    • 85

    Chance Thunderstorms

    • 67
    • 94

    Mostly Sunny

    • 67
    • 94

    Chance Rain Showers

Today 14 May Westmoreland

Considerable cloudiness with a 50 percent chance of Showers. Cold with Highs in the mid 50s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 14 May Westmoreland

Mostly cloudy with a slight chance of Showers in the Evening, then mainly clear after midnight. Lows in the lower 40s. Northwest Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Irwin Temperature Statistics

May Temperature

Pittsburgh - Allegheny County Airport (11.2 miles)

  • Lowest 2 May, 2026

    34 °F

  • Average May

    52.8 °F

  • Highest 5 May, 2026

    73.9 °F

Climate (2021–Present)

Pittsburgh - Allegheny County Airport (11.2 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    63.4 °F
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