Parnassus Weather Forecast

    • 62
    • 83

    Chance Rain Showers

    • 62
    • 82

    Partly Sunny

    • 67
    • 83

    Rain Showers Likely

    • 61
    • 84

    Slight Chance Thunderstorms

    • 64
    • 82

    Partly Sunny

    • 64
    • 87

    Chance Thunderstorms

Today 10 Sep Westmoreland

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Near steady temperature around 80. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 10 Sep Westmoreland

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the Evening, then a slight chance of Showers after midnight. Patchy fog. Humid with Lows in the lower 60s. West Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 40 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Parnassus Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (16.2 miles)

  • Lowest 6 September, 2026

    57.9 °F

  • Average September

    73.2 °F

  • Highest 2 September, 2026

    91 °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 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.3 °F
Get WillyWeather+ to remove ads