Parnassus Weather Forecast

    • 66
    • 85

    Rain Showers Likely

    • 58
    • 82

    Chance Thunderstorms

    • 56
    • 80

    Mostly Sunny

    • 58
    • 81

    Partly Sunny

    • 63
    • 83

    Mostly Cloudy

    • 68
    • 85

    Chance Rain Showers

Today 4 Sep Westmoreland

Mostly cloudy. Showers with a chance of Thunderstorms this afternoon. Warm with Highs in the mid 80s. West Winds 5 to 10 Mph. Chance of rain 80 percent.

Tonight 4 Sep Westmoreland

Mostly cloudy with a chance of Thunderstorms. A chance of Showers in the Evening, then Showers likely after midnight. Patchy fog. Warm with Lows in the mid 60s. West Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Parnassus Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (16.2 miles)

  • Lowest 1 September, 2026

    71.1 °F

  • Average September

    79.4 °F

  • Highest 2 September, 2026

    91 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (16.2 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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