Pittsburgh Weather Forecast

    • 57
    • 79

    Rain Showers

    • 56
    • 70

    Rain Showers Likely

    • 54
    • 67

    Rain Showers Likely

    • 53
    • 65

    Rain Showers Likely

    • 52
    • 66

    Slight Chance Rain Showers

    • 51
    • 70

    Partly Sunny

Today 20 Sep Allegheny

Showers with a slight chance of Thunderstorms in the Morning, then Showers likely with a chance of Thunderstorms in the afternoon. Humid with Highs in the upper 70s. Southwest Winds 5 to 10 Mph. Chance of rain near 100 percent.

Tonight 20 Sep Allegheny

A chance of Thunderstorms in the evening. Mostly cloudy with a chance of Showers. Lows in the mid 50s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Pittsburgh Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (6.8 miles)

  • Lowest 15 September, 2026

    53.1 °F

  • Average September

    72.2 °F

  • Highest 2 September, 2026

    91 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (6.8 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.3 °F
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