Parnassus Weather Forecast

    • 60
    • 77

    Rain Showers

    • 63
    • 81

    Chance Rain Showers

    • 61
    • 83

    Chance Thunderstorms

    • 56
    • 78

    Chance Rain Showers

    • 55
    • 77

    Partly Sunny

    • 58
    • 80

    Partly Sunny

Today 20 Aug Westmoreland

Patchy fog this morning. A slight chance of Thunderstorms. Showers. Highs in the mid 70s. East Winds around 5 Mph, becoming north this afternoon. Chance of rain near 100 percent.

Tonight 20 Aug Westmoreland

Mainly clear. A slight chance of Showers in the evening. Patchy fog after midnight. Humid with Lows around 60. Northeast Winds around 5 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Parnassus Temperature Statistics

August Temperature

Pittsburgh - Allegheny County Airport (16.2 miles)

  • Lowest 4 August, 2026

    60.1 °F

  • Average August

    73 °F

  • Highest 4 August, 2026

    86 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (16.2 miles)

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

  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.3 °F
Get WillyWeather+ to remove ads