Monongahela Weather Forecast

    • 64
    • 85

    Increasing Clouds

    • 68
    • 86

    Rain Showers

    • 59
    • 78

    Rain Showers

    • 59
    • 79

    Partly Sunny

    • 65
    • 83

    Chance Thunderstorms

    • 63
    • 83

    Chance Rain Showers

Today 8 Sep Washington

Partly cloudy. Highs in the lower 80s. Southwest Winds around 5 Mph.

Tonight 8 Sep Washington

Partly cloudy. Warm with Lows in the mid 60s. South Winds 5 to 10 Mph.

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Monongahela Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 3 September, 2026

    66 °F

  • Average September

    76 °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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