Parnassus Weather Forecast

    • 61
    • 82

    Chance Thunderstorms

    • 61
    • 82

    Mostly Sunny

    • 62
    • 82

    Rain Showers Likely

    • 58
    • 80

    Slight Chance Thunderstorms

    • 60
    • 80

    Partly Sunny

    • 61
    • 81

    Chance Rain Showers

Today 17 Aug Westmoreland

Mostly cloudy with scattered Showers. Isolated Thunderstorms this Morning, then scattered Thunderstorms this afternoon. Highs around 80. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 17 Aug Westmoreland

Mostly cloudy with numerous Showers and scattered Thunderstorms in the Evening, then partly cloudy after midnight. Patchy fog in the evening. Areas of fog after midnight. Humid with Lows in the lower 60s. Northwest Winds around 5 Mph. Chance of rain 70 percent.

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  • 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

    72.9 °F

  • Highest 4 August, 2026

    86 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (16.2 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.3 °F
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