Monongahela Weather Forecast

    • 56
    • 78

    Chance Thunderstorms

    • 49
    • 76

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 49
    • 75

    Mostly Sunny

    • 52
    • 76

    Mostly Sunny

    • 52
    • 76

    Mostly Sunny

Today 27 May Washington

Partly sunny with a chance of Showers and Thunderstorms. Some Thunderstorms may produce heavy rainfall. Near steady temperature in the mid 70s. Northwest Winds around 5 Mph. Chance of rain 50 percent.

Tonight 27 May Washington

Mostly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mainly clear after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Lows in the mid 50s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Monongahela Temperature Statistics

May Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 2 May, 2026

    34 °F

  • Average May

    57.8 °F

  • Highest 18 May, 2026

    87.1 °F

Climate (2021–Present)

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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