Pittsburgh International Airport Weather Forecast

    • 66
    • 81

    Rain Showers

    • 58
    • 76

    Mostly Cloudy

    • 65
    • 76

    Rain Showers

    • 59
    • 75

    Rain Showers Likely

    • 59
    • 68

    Chance Rain Showers

    • 54
    • 65

    Chance Rain Showers

    • 54
    • 66

    Chance Rain Showers

Today 17 Sep Allegheny

Partly sunny with a 40 percent chance of Showers. Highs around 70.

Tonight 17 Sep Allegheny

Mostly cloudy. A chance of Showers and Thunderstorms this Evening, then a slight chance of Showers after midnight. Patchy fog after midnight. Warm with Lows in the upper 60s. Northwest Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Pittsburgh International Airport Temperature Statistics

September Temperature

Pittsburgh, Pittsburgh International Airport (1.9 miles)

  • Lowest 15 September, 2026

    53.1 °F

  • Average September

    73.8 °F

  • Highest 2 September, 2026

    92.6 °F

Climate (2021–2026)

Pittsburgh, Pittsburgh International Airport (1.9 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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