Parnassus Weather Forecast

    • 68
    • 91

    Slight Chance Thunderstorms

    • 67
    • 90

    Rain Showers

    • 48
    • 78

    Chance Rain Showers

    • 52
    • 69

    Chance Rain Showers

    • 57
    • 72

    Rain Showers Likely

    • 61
    • 76

    Rain Showers Likely

Today 18 May Westmoreland

Sunny. Unseasonably warm with Highs in the upper 80s. Southwest Winds 5 to 10 Mph.

Tonight 18 May Westmoreland

Mainly clear. Warm with Lows in the upper 60s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Parnassus Temperature Statistics

May Temperature

Pittsburgh - Allegheny County Airport (16.2 miles)

  • Lowest 2 May, 2026

    34 °F

  • Average May

    53.1 °F

  • Highest 5 May, 2026

    73.9 °F

Climate (2021–Present)

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

    63.4 °F
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