Irwin Weather Forecast

    • 56
    • 79

    Mostly Sunny

    • 62
    • 84

    Partly Sunny

    • 68
    • 85

    Rain Showers

    • 58
    • 78

    Rain Showers

    • 58
    • 76

    Partly Sunny

    • 63
    • 82

    Slight Chance Rain Showers

Today 7 Sep Westmoreland

Mostly sunny. Highs in the upper 70s. Northeast Winds around 5 Mph.

Tonight 7 Sep Westmoreland

Mainly clear. Lows in the mid 50s. East Winds around 5 Mph.

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Irwin Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (11.2 miles)

  • Lowest 3 September, 2026

    66 °F

  • Average September

    76 °F

  • Highest 2 September, 2026

    91 °F

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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