Parnassus Weather Forecast

    • 48
    • 71

    Mostly Sunny

    • 54
    • 73

    Partly Sunny

    • 56
    • 69

    Mostly Cloudy

    • 57
    • 68

    Mostly Cloudy

    • 55
    • 72

    Mostly Cloudy

    • 59
    • 75

    Mostly Cloudy

    • 60
    • 76

    Chance Rain Showers

Today 25 Sep Westmoreland

Mostly cloudy in the Morning, then becoming partly sunny. A 40 percent chance of Showers. Highs in the mid 70s.

Tonight 25 Sep Westmoreland

Mainly clear. Lows in the upper 40s. North Winds 5 to 10 Mph.

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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

    69.8 °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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