Irwin Weather Forecast

    • 56
    • 77

    Rain Showers Likely

    • 49
    • 75

    Mostly Sunny

    • 53
    • 77

    Mostly Sunny

    • 49
    • 75

    Mostly Sunny

    • 51
    • 74

    Mostly Sunny

    • 51
    • 74

    Partly Sunny

Today 27 May Westmoreland

Patchy fog in the morning. Considerable cloudiness with a slight chance of Thunderstorms. A chance of Showers, mainly in the morning. Humid with Highs in the upper 70s. West Winds around 5 Mph. Chance of rain 50 percent.

Tonight 27 May Westmoreland

Mostly cloudy in the Evening, then becoming mainly clear. Patchy fog after midnight. Lows in the mid 50s. West Winds around 5 Mph.

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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

    57.4 °F

  • Highest 18 May, 2026

    87.1 °F

Climate (2021–Present)

Pittsburgh - Allegheny County Airport (11.2 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.3 °F
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