Irwin Weather Forecast

    • 34
    • 63

    Increasing Clouds

    • 52
    • 67

    Rain Showers Likely

    • 45
    • 68

    Rain Showers

    • 43
    • 59

    Slight Chance Rain Showers

    • 51
    • 70

    Chance Rain Showers

    • 57
    • 79

    Chance Thunderstorms

Today 11 May Westmoreland

Mostly sunny. Highs in the lower 60s. Northwest Winds 5 to 10 Mph.

Tonight 11 May Westmoreland

Mainly clear. Areas of frost after midnight. Unseasonably cold with Lows in the mid 30s. North Winds 5 to 10 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

    52.1 °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

    54.6 °F

  • Average High 2021–2026

    63.4 °F
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