Rosslyn Farms Weather Forecast

    • 67
    • 85

    Rain Showers

    • 58
    • 82

    Chance Thunderstorms

    • 54
    • 72

    Partly Sunny

    • 63
    • 81

    Partly Sunny

    • 67
    • 84

    Slight Chance Rain Showers

    • 64
    • 83

    Chance Rain Showers

Today 12 Sep Allegheny

Mostly cloudy with a chance of Showers and Thunderstorms. Some Thunderstorms may produce heavy rainfall. Warm. Near steady temperature in the lower 80s. South Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 12 Sep Allegheny

Showers with Thunderstorms likely in the Evening, then a chance of Showers after midnight. Patchy fog. Some Thunderstorms may produce heavy rainfall in the evening. Warm with Lows in the mid 60s. South Winds around 5 Mph. Chance of rain near 100 percent.

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Rosslyn Farms Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 6 September, 2026

    57.9 °F

  • Average September

    73.5 °F

  • Highest 2 September, 2026

    91 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (9.9 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    63.3 °F
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