Monongahela Weather Forecast

    • 44
    • 69

    Rain Showers

    • 42
    • 58

    Chance Rain Showers

    • 52
    • 71

    Partly Sunny

    • 60
    • 83

    Chance Rain Showers

    • 63
    • 88

    Slight Chance Thunderstorms

    • 69
    • 94

    Partly Sunny

Today 13 May Washington

Showers. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Highs in the upper 60s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

Tonight 13 May Washington

A chance of Thunderstorms in the evening. Mostly cloudy with a slight chance of Showers. Lows in the mid 40s. Northwest Winds 10 to 15 Mph. Chance of rain 50 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

    52.8 °F

  • Highest 5 May, 2026

    73.9 °F

Climate (2021–Present)

Pittsburgh - Allegheny County Airport (9.9 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    63.4 °F
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