Irwin Weather Forecast

    • 61
    • 77

    Rain Showers

    • 60
    • 79

    Rain Showers

    • 63
    • 82

    Chance Rain Showers

    • 61
    • 81

    Chance Thunderstorms

    • 53
    • 80

    Slight Chance Rain Showers

    • 50
    • 74

    Partly Sunny

Today 24 May Westmoreland

Mostly cloudy. Isolated Showers in the Morning, then scattered Showers and Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the afternoon. Highs in the upper 70s. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 24 May Westmoreland

Showers and scattered Thunderstorms in the Evening, then numerous Showers with isolated Thunderstorms after midnight. Patchy fog after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Warm with Lows in the lower 60s. Southeast Winds 5 to 10 Mph, becoming south after midnight. Chance of rain 80 percent.

Graph Plots Open in Graphs

  • 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

    57.3 °F

  • Highest 18 May, 2026

    87.1 °F

Climate (2021–Present)

Pittsburgh - Allegheny County Airport (11.2 miles)

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

  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.4 °F
Get WillyWeather+ to remove ads