Pittsburgh International Airport Weather Forecast

    • 57
    • 81

    Decreasing Clouds

    • 56
    • 79

    Mostly Sunny

    • 57
    • 84

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

    • 64
    • 84

    Partly Sunny

    • 63
    • 81

    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 International Airport Temperature Statistics

September Temperature

Pittsburgh, Pittsburgh International Airport (1.9 miles)

  • Lowest 8 September, 2025

    42.1 °F

  • Average September

    64.2 °F

  • Highest 3 September, 2025

    82 °F

Climate (2020–Present)

Pittsburgh, Pittsburgh International Airport (1.9 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    63.1 °F
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