Pittsburgh Weather Forecast

    • 58
    • 83

    Decreasing Clouds

    • 57
    • 81

    Partly Sunny

    • 58
    • 86

    Sunny

    • 59
    • 86

    Mostly Sunny

    • 65
    • 86

    Partly Sunny

    • 64
    • 84

    Chance Rain Showers

Today 16 Sep Allegheny

Partly cloudy. Highs in the lower 80s. East Winds 5 to 10 Mph.

Tonight 16 Sep Allegheny

Mainly clear. Lows in the mid 50s. East Winds around 5 Mph.

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Pittsburgh Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (6.8 miles)

  • Lowest 8 September, 2025

    45 °F

  • Average September

    64.4 °F

  • Highest 3 September, 2025

    82 °F

Climate (2020–Present)

Pittsburgh - Allegheny County Airport (6.8 miles)

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  • Average Low 2020–2025

    46.1 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    63.3 °F
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