Rosslyn Farms Weather Forecast

    • 69
    • 90

    Thunderstorms

    • 67
    • 86

    Rain Showers

    • 59
    • 80

    Partly Sunny

    • 60
    • 78

    Mostly Sunny

    • 62
    • 80

    Partly Sunny

    • 65
    • 82

    Mostly Cloudy

Today 3 Sep Allegheny

Partly sunny with numerous Showers and Thunderstorms this Morning, then partly cloudy with scattered Showers and Thunderstorms this afternoon. Hot with Highs around 90. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent. Heat index Values in the upper 90s this afternoon.

Tonight 3 Sep Allegheny

Mostly cloudy. Numerous Showers and Thunderstorms in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Warm with Lows in the upper 60s. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent.

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Rosslyn Farms Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 1 September, 2026

    71.1 °F

  • Average September

    78.6 °F

  • Highest 1 September, 2026

    88 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (9.9 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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