Mount Lebanon Weather Forecast

    • 69
    • 90

    Chance Thunderstorms

    • 67
    • 86

    Rain Showers

    • 59
    • 80

    Slight Chance Rain Showers

    • 60
    • 78

    Mostly Sunny

    • 62
    • 80

    Partly Sunny

    • 65
    • 82

    Partly Sunny

Today 3 Sep Allegheny

Partly sunny with a chance of Showers and Thunderstorms. Unseasonably warm. Humid with Highs in the upper 80s. West Winds 5 to 10 Mph. Chance of rain 50 percent. Heat index Values up to 100 in the afternoon.

Tonight 3 Sep Allegheny

Mostly cloudy with a chance of Showers. A chance of Thunderstorms, mainly in the evening. Warm with Lows around 70. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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Mount Lebanon Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (6.2 miles)

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Climate (2021–2026)

Pittsburgh - Allegheny County Airport (6.2 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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