Monongahela Weather Forecast

    • 64
    • 83

    Rain Showers

    • 52
    • 77

    Partly Sunny

    • 55
    • 78

    Mostly Sunny

    • 62
    • 83

    Mostly Cloudy

    • 64
    • 84

    Partly Sunny

    • 66
    • 85

    Rain Showers Likely

Today 21 Jul Washington

Showers and Thunderstorms likely. Some Thunderstorms may produce heavy rainfall. Near steady temperature in the upper 70s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Tonight 21 Jul Washington

Mostly cloudy. Showers and Thunderstorms likely in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Humid with Lows in the mid 60s. West Winds 10 to 15 Mph. Chance of rain 70 percent.

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Monongahela Temperature Statistics

July Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 19 July, 2026

    64.9 °F

  • Average July

    77.2 °F

  • Highest 2 July, 2026

    93 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (9.9 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    63.4 °F
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