Irwin Weather Forecast

    • 66
    • 83

    Chance Rain Showers

    • 62
    • 81

    Chance Rain Showers

    • 63
    • 85

    Mostly Sunny

    • 65
    • 88

    Chance Rain Showers

    • 58
    • 82

    Chance Thunderstorms

    • 52
    • 75

    Slight Chance Thunderstorms

    • 50
    • 71

    Partly Sunny

Today 20 Aug Westmoreland

Partly sunny with scattered Showers and Thunderstorms. Near steady temperature around 80. Northwest Winds around 5 Mph. Chance of rain 50 percent.

Tonight 20 Aug Westmoreland

Isolated Thunderstorms in the evening. Mostly cloudy with isolated Showers. Humid with Lows in the mid 60s. North Winds around 5 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Irwin Temperature Statistics

August Temperature

Pittsburgh - Allegheny County Airport (11.2 miles)

  • Lowest 3 August, 2025

    56.6 °F

  • Average August

    74.1 °F

  • Highest 12 August, 2025

    91.7 °F

Climate (2020–Present)

Pittsburgh - Allegheny County Airport (11.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    54.7 °F

  • Average High 2020–2025

    63.4 °F
Get WillyWeather+ to remove ads