Monongahela Weather Forecast

    • 50
    • 64

    Partly Sunny

    • 43
    • 67

    Mostly Sunny

    • 46
    • 71

    Mostly Sunny

    • 48
    • 72

    Mostly Sunny

    • 49
    • 70

    Partly Sunny

    • 50
    • 72

    Mostly Sunny

Today 23 Sep Washington

Partly cloudy with a 30 percent chance of Showers. Near steady temperature in the lower 60s. East Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 23 Sep Washington

Partly cloudy. Lows around 50. East Winds 10 to 15 Mph with Gusts up to 25 Mph.

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Monongahela Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 15 September, 2026

    53.1 °F

  • Average September

    70.9 °F

  • Highest 2 September, 2026

    91 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (9.9 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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