Parnassus Weather Forecast

    • 52
    • 63

    Rain Showers Likely

    • 49
    • 66

    Mostly Cloudy

    • 44
    • 67

    Partly Sunny

    • 47
    • 71

    Mostly Sunny

    • 49
    • 70

    Mostly Sunny

    • 49
    • 71

    Partly Sunny

    • 51
    • 73

    Partly Sunny

Today 22 Sep Westmoreland

Partly cloudy. Highs in the mid 70s.

Tonight 22 Sep Westmoreland

Considerable cloudiness. Patchy fog this evening. A chance of Showers, mainly this evening. Lows in the lower 50s. East Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Parnassus Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (16.2 miles)

  • Lowest 15 September, 2026

    53.1 °F

  • Average September

    71.5 °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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