Irwin Weather Forecast

    • 52
    • 66

    Rain Showers Likely

    • 48
    • 68

    Rain Showers Likely

    • 53
    • 77

    Partly Sunny

    • 56
    • 78

    Rain Showers Likely

    • 49
    • 69

    Rain Showers

    • 46
    • 67

    Slight Chance Rain Showers

Today 21 Apr Westmoreland

Widespread frost this morning. Mostly sunny. Highs in the mid 60s. South Winds 5 to 10 Mph.

Tonight 21 Apr Westmoreland

Mostly cloudy. A slight chance of Showers in the Evening, then Showers likely with a slight chance of Thunderstorms after midnight. Mild. Lows in the lower 50s. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Irwin Temperature Statistics

April Temperature

Pittsburgh - Allegheny County Airport (11.2 miles)

  • Lowest 8 April, 2026

    26.1 °F

  • Average April

    58.8 °F

  • Highest 15 April, 2026

    82.9 °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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