Irwin Weather Forecast

    • 52
    • 62

    Chance Rain Showers

    • 49
    • 63

    Mostly Cloudy

    • 44
    • 66

    Partly Sunny

    • 47
    • 68

    Mostly Sunny

    • 48
    • 68

    Mostly Sunny

    • 50
    • 70

    Partly Sunny

Today 22 Sep Westmoreland

Showers likely. Patchy fog. Near steady temperature around 60. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Tonight 22 Sep Westmoreland

Cloudy with a 50 percent chance of Showers. Patchy fog. Lows in the lower 50s. East Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Irwin Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (11.2 miles)

  • Lowest 15 September, 2026

    53.1 °F

  • Average September

    71.5 °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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