Sewickley Hills Weather Forecast

    • 57
    • 82

    Chance Thunderstorms

    • 52
    • 72

    Mostly Sunny

    • 62
    • 80

    Partly Sunny

    • 66
    • 84

    Chance Rain Showers

    • 65
    • 84

    Chance Rain Showers

    • 59
    • 79

    Chance Rain Showers

Today 13 Sep Allegheny

Mostly cloudy in the Morning, then becoming partly cloudy. Patchy fog in the morning. Humid with Highs in the lower 80s. West Winds 5 to 10 Mph.

Tonight 13 Sep Allegheny

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy with a slight chance of Showers after midnight. Humid with Lows in the upper 50s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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Sewickley Hills Temperature Statistics

September Temperature

Pittsburgh, Pittsburgh International Airport (8.1 miles)

  • Lowest 7 September, 2026

    58.6 °F

  • Average September

    75 °F

  • Highest 2 September, 2026

    92.6 °F

Climate (2021–2026)

Pittsburgh, Pittsburgh International Airport (8.1 miles)

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  • Average Low 2021–2026

    45 °F

  • Average 2021–2026

    54.2 °F

  • Average High 2021–2026

    63.5 °F
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