Monongahela Weather Forecast

    • 63
    • 83

    Thunderstorms

    • 60
    • 82

    Partly Sunny

    • 61
    • 83

    Mostly Sunny

    • 66
    • 86

    Partly Sunny

    • 69
    • 87

    Partly Sunny

    • 70
    • 90

    Slight Chance Thunderstorms

Today 27 Aug Washington

Partly cloudy with isolated Showers. Isolated Thunderstorms in the afternoon. Humid with Highs in the lower 80s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 27 Aug Washington

Partly cloudy. Isolated Showers and Thunderstorms in the evening. Areas of fog after midnight. Humid with Lows in the lower 60s. Northwest Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.

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Monongahela Temperature Statistics

August Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 24 August, 2026

    55.9 °F

  • Average August

    71.6 °F

  • Highest 4 August, 2026

    86 °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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